-
A multi-objective and CFD based optimization of roof-flap geometry and position for simultaneous drag and lift reduction Propuls. Power Res. (IF 5.3) Pub Date : 2024-03-11 Mohammad Rostamzadeh-Renani, Mohammadreza Baghoolizadeh, S. Mohammad Sajadi, Reza Rostamzadeh-Renani, Narjes Khabazian Azarkhavarani, Soheil Salahshour, Davood Toghraie
As the transport sector is responsible for the consumption of a vast proportion of the oil produced, it is mandatory to research feasible solutions to tackle this issue. The application of aerodynamic attachments for passive flow control and reducing resisting aerodynamic forces such as drag and lift is one of the most practicable ways to minimize vehicle energy consumption. The flaps are one of the
-
Local resistance characteristics of elbows for supercritical pressure RP-3 flowing in serpentine micro-tubes Propuls. Power Res. (IF 5.3) Pub Date : 2024-02-29 Yanchen Fu, Yinlong Liu, Juan Wang, Yu Wang, Guoqiang Xu, Jie Wen
Based on the demands of compact heat exchangers and micro cooling channels applied for aviation thermal protection on aero-engines, the elbow local flow resistance characteristics for supercritical pressure aviation fuel RP-3 flowing in adiabatic horizontal serpentine tubes with the inner diameter of 1.8 mm and the mass flux of 1179 kg/(m·s) were experimentally studied. The long-short-tube method was
-
Effect of proton irradiation on the optical properties of thermal control coating based on polystyrene with silica filler Propuls. Power Res. (IF 5.3) Pub Date : 2024-02-29 N.I. Cherkashina, V.I. Pavlenko, M.M. Mikhailov, A.N. Lapin, S.A. Yuriev, R.V. Sidelnikov, D.S. Romanyuk
This paper presents the results of studying the surface properties changes of a thermoregulating coating based on polystyrene and silica filler after proton irradiation with an energy of 50 keV at a fluence of 3 × 10 cm. After proton irradiation, the values of the contact angle of wetting with water increase by 3.5% and 14.9% for polystyrene and the coating, respectively. The free surface energy (energy
-
Thermal optimization of MHD nanofluid over a wedge by using response surface methodology: Sensitivity analysis Propuls. Power Res. (IF 5.3) Pub Date : 2023-12-15 Ahmed Zeeshan, Dilawar Hussain, Zaheer Asghar, Muhammad Mubashir Bhatti, Faisal Z. Duraihem
It is well documented that heat transfer is enhanced with addition of nanosized particles in fluid. But, in a mechanical system there are variety of factors influences the heat transfer. Some factors are significant while others are not. In this paper, authors will discuss sensitivity of different input parameters such as Le, Nt and Nb on output responses Nux and Shx. To achieve this goal, the problem
-
Optimization of operating conditions in the steam turbine blade cascade using the black-box method Propuls. Power Res. (IF 5.3) Pub Date : 2023-12-13 Vahid Sadrian, Esmail Lakzian, Davood Hoseinzade, Behrad Haghighi, M.M. Rashidi, Heuy Dong Kim
Water droplets cause corrosion and erosion, condensation loss, and thermal efficiency reduction in low-pressure steam turbines. In this study, multi-objective optimization was carried out using the black-box method through the automatic linking of a genetic algorithm (GA) and a computational fluid dynamics (CFD) code to find the optimal values of two design variables (inlet stagnation temperature and
-
Influence of temperature dependent heat source/sink on transient MHD free convective flow in an infinite rigid impermeable vertical cylinder with chemical reaction Propuls. Power Res. (IF 5.3) Pub Date : 2023-12-12 Naveen Dwivedi, Ashok Kumar Singh, Nirmal C. Sacheti
It is increasingly apparent that the inclusion of mass transfer aspects, together with certain thermal conditions, in the momentum and energy equations governing MHD flows leads to a numbers of real life applications. Keeping this in view, we have attempted an exact analysis of heat and mass transfer aspects in transient hydromagnetic free convective flow of an incompressible viscous fluid through
-
Auto-updating model-based control for thrust variation mitigation and acceleration performance enhancement of gas turbine aero-engines Propuls. Power Res. (IF 5.3) Pub Date : 2023-11-30 Zhiyuan Wei, Shuguang Zhang
Model-based control shows promising potential for engine performance improvement and future aero-propulsion requirements. In this paper, an auto-updating thrust variation mitigation (AuTVM) control approach using on-board model strategies is proposed for gas turbine aero-engines under in-service degradation effects, which aims at active thrust regulation and acceleration protection in a simultaneous
-
New insights into component matching mechanism in the compression system of double bypass engine Propuls. Power Res. (IF 5.3) Pub Date : 2023-11-30 Ruoyu Wang, Xianjun Yu, Baojie Liu, Guangfeng An
Variable cycle engine (VCE) is one of the most promising technologies for the next-generation aircraft, the matching of different components in the compression system is a key difficulty VCE faced. To investigate the component matching mechanisms in the VCE compression system, an advanced throughflow program is employed to calculate the characteristic lines of each component, and a zero-dimensional
-
Heat transfer optimization and rheological features of Buongiorno nanofluid in a convectively heated inclined annulus with nonlinear thermal radiation Propuls. Power Res. (IF 5.3) Pub Date : 2023-11-30 Puneet Rana
The theoretical analysis of the mixed convective Buongiorno nanofluid flow in an inclined annular microchannel with convectively heated walls subjected to the effects of nonlinear thermal radiation, exponential heat source (EHS), thermal dependent heat source (THS) is carried out. The description of the Buongiorno nanofluid is implemented to analyze the Brownian diffusion and thermo-migration mechanisms
-
N2 and Ar dilution on the premixed biogas jet flame under external acoustic enforcement Propuls. Power Res. (IF 5.3) Pub Date : 2023-11-30 Buğrahan Alabaş, İlker Yılmaz, Yakup Çam
In this study, combustion instabilities and flue gas emission changes under different dilutions of N2 (nitrogen) and Ar (argon) of a promising biogas mixture (70% CH4 - 30% CO2) in the fight against greenhouse gas emissions were investigated. In the experiments, additions were made from 0% to 50% at intervals of 10% for both gases. In order to detect the instability of the flame, external acoustic
-
Numerical study for bio-convection effects on MHD nano-fluid flow past a porous and extending wedge Propuls. Power Res. (IF 5.3) Pub Date : 2023-11-30 Bagh Ali, Muhammad Ilyas, Imran Siddique, Huizhu Yang, Muhammad Kamran Ashraf, Sohaib Abdal
We explored the insinuations of bio-convection and thermal radiation on nanofluid transportation across stretching permeable wedge with magnetic force. Appropriate similarity transformation variables are utilized to achieve ordinary differential equations. In order to tackle the non-linearity of these equations, numerical procedure based on shooting technique and Range Kutta method are harnessed on
-
Analytical analysis of inclined three-layered composite channel with cobalt ferrite nanoparticles and Hall current in Darcy medium Propuls. Power Res. (IF 5.3) Pub Date : 2023-11-25 P.V. Ananth Subray, B.N. Hanumagowda, C.S.K. Raju, S.V.K. Varma, Prakash Jagdish, Se-Jin Yook, Nehad Ali Shah
The present study explores the influence of electromagnetic effects on the flow of a nanofluid in a saturated permeable medium, confined between a clear viscous fluid in an inclined channel. The nanofluid consists of cobalt ferrite nanoparticles dispersed in ethylene glycol. The governing equations are derived considering Darcy's law for the permeable medium and Tiwari's model for fluids containing
-
Static pressure redistribution mechanism of non-axisymmetric endwall based on radial equilibrium Propuls. Power Res. (IF 5.3) Pub Date : 2023-11-22 Hanwen Guo, Donghai Jin, Xiwu Liu, Xingmin Gui
Non-axisymmetric endwall contouring has been proved to be an effective flow control technique in turbomachinery. Several different flow control mechanisms and qualitative design strategies have been proposed. The endwall contouring mechanism based on the flow governing equations is significant for exploring the quantitative design strategies of the non-axisymmetric endwall contouring. In this paper
-
Power and efficiency optimizations for an open cycle two-shaft gas turbine power plant Propuls. Power Res. (IF 5.3) Pub Date : 2023-11-21 Lingen Chen, Huijun Feng, Yanlin Ge, Shuangshuang Shi
In finite-time thermodynamic analyses for various gas turbine cycles, there are two common models: one is closed-cycle model with thermal conductance optimization of heat exchangers, and another is open-cycle model with optimization of pressure drop (PD) distributions. Both of optimization also with searching optimal compressor pressure ratio (PR). This paper focuses on an open-cycle model. A two-shaft
-
Deep learning-based modeling method for probabilistic LCF life prediction of turbine blisk Propuls. Power Res. (IF 5.3) Pub Date : 2023-10-12 Cheng-Wei Fei, Yao-Jia Han, Jiong-Ran Wen, Chen Li, Lei Han, Yat-Sze Choy
Turbine blisk is one of the typical components of gas turbine engines. The fatigue life of turbine blisk directly affects the reliability and safety of both turbine blisk and aeroengine whole-body. To monitor the performance degradation of an aeroengine, an efficient deep learning-based modeling method called convolutional-deep neural network (C-DNN) method is proposed by absorbing the advantages of
-
Thermodynamic performance modeling, optimization and numerical simulation of RBCC ejector mode Propuls. Power Res. (IF 5.3) Pub Date : 2023-09-22 Feiteng Luo, Zhenming Qu, Yaosong Long, Wenjuan Chen, Jinli Hou, Baoxi Wei
Ejector mode is a unique and critical phase of wide-range rocket-based combined cycle (RBCC) engine. In this paper, a quasi-one-dimensional thermodynamic performance modeling method, with more detailed model treatments for the inlet-diffuser system, primary/secondary flow interaction, and pressure feedback matching, was developed for operating characteristics studies and multi-objective optimization
-
First and second laws analysis of viscoelastic fluid with temperature dependent properties for Couette-Poiseuille flow Propuls. Power Res. (IF 5.3) Pub Date : 2023-09-22 Mehdi Moayed Mohseni, Farshid Pajoum Shariati
The entropy analysis of viscoelastic fluid obeying the simplified Phan-Thien-Tanner (SPTT) model with variable thermophysical properties are obtained for laminar, steady state and fully developed Couette-Poiseuille flow. The homotopy perturbation method (HPM) allows us to solve nonlinear momentum and energy differential equations. The Reynold's model is used to describe the temperature dependency of
-
Understanding of tip clearance flow structure in high speed mixed flow compressor Propuls. Power Res. (IF 5.3) Pub Date : 2023-09-19 Hemant Kumar, Chetan S. Mistry
This paper addresses the necessity to make a physical interpretation of a highly complex three-dimensional tip clearance flow field study for high-speed mixed-flow compressor having stage exit static pressure to inlet total pressure ratio of 3.8 with 39,836 rpm rotor speed. The four different tip configurations namely the constant (λ = 0.016 and 0.019) and variable (λ = 0.011 (inlet)-0.019 (exit) and
-
Darcy-Forchheimer mangetized flow based on differential type nanoliquid capturing Ohmic dissipation effects Propuls. Power Res. (IF 5.3) Pub Date : 2023-09-19 M. Waqas, Yunjie Xu, M. Nasir, Md Mottahir Alam, Amjad Ali Pasha, Kashif Irshad, Bandar M. Fadhl, M.S. Kausar
Hydromagnetic nanoliquid establish an extraordinary category of nanoliquids that unveil both liquid and magnetic attributes. The interest in the utilization of hydromagnetic nanoliquids as a heat transporting medium stem from a likelihood of regulating its flow along with heat transportation process subjected to an externally imposed magnetic field. This analysis reports the hydromagnetic nanoliquid
-
Artificial neural network model of non-Darcy MHD Sutterby hybrid nanofluid flow over a curved permeable surface: Solar energy applications Propuls. Power Res. (IF 5.3) Pub Date : 2023-09-19 Shaik Jakeer, Maduru Lakshmi Rupa, Seethi Reddy Reddisekhar Reddy, A.M. Rashad
The conversion of solar radiation to thermal energy has recently much interest as the requirement for renewable heat and power grows. Due to their enhanced ability to promote heat transmission, nanofluids can significantly improve solar-thermal systems' efficiency. This section aims to study the heat transfer behavior of the Sutterby hybrid nanofluid flow of magnetohydrodynamics in the presence of
-
Falkner-Skan aspects of a radiating (50% ethylene glycol + 50% water)-based hybrid nanofluid when Joule heating as well as Darcy-Forchheimer and Lorentz forces affect significantly Propuls. Power Res. (IF 5.3) Pub Date : 2023-09-12 Ghulam Rasool, A. Wakif, Xinhua Wang, Ahmed Alshehri, Abdulkafi Mohammed Saeed
Falkner-Skan aspects are revealed numerically for a non-homogeneous hybrid mixture of 50% ethylene glycol-50% water, silver nanomaterials Ag, and molybdenum disulfide nanoparticles MoS2 during its motion over a static wedge surface in a Darcy-Forchheimer porous medium by employing the modified Buongiorno model. The Brownian and thermophoresis mechanisms are included implicitly along with the thermophysical
-
Numerical study of vortex breaker optimization in a first stage oxygen tank Propuls. Power Res. (IF 5.3) Pub Date : 2023-09-07 Yixiu Shen, Yimeng Li, Zhenggang Du
One of the crucial factors affecting the carrying capacity of the cryogenic liquid launch vehicle is the effective volume of the tank. Theoretical and experimental investigations on vortex breaker mechanisms have proposed promising schemes applied in the oxygen tank of the liquid-propellant launch vehicle to ensure the normal operation of the engine. In this paper, the liquid surface profile functions
-
Review of the development of the probabilistic damage tolerance assessment of life-limited parts in compliance with the airworthiness regulations Propuls. Power Res. (IF 5.3) Pub Date : 2023-08-23 Shuiting Ding, Huimin Zhou, Junbo Liu, Xingyu Zhang, Guo Li
Probabilistic damage tolerance is a critical method to understand and communicate risk and safety. This paper reviews recent research on the probabilistic damage tolerance design for life-limited parts. The vision of the probabilistic damage tolerance assessment is provided. Five core parts of the probabilistic damage tolerance method are introduced separately, including the anomaly distribution, stress
-
Numerical computation of Brownian motion and thermophoresis effects on rotational micropolar nanomaterials with activation energy Propuls. Power Res. (IF 5.3) Pub Date : 2023-07-21 Hassan Waqas, Shan Ali Khan, Bagh Ali, Dong Liu, Taseer Muhammad, Enran Hou
The current article investigates the numerical study of the micropolar nanofluid flow through a 3D rotating surface. This communication may manipulate for the aim such as the delivery of the drug, cooling of electronic chips, nanoscience and the fields of nanotechnology. The impact of heat source/sink is employed. Brownian motion and thermophoresis aspects are discussed. The rotating sheet with the
-
Bioconvective nanofluid flow over an exponential stretched sheet with thermophoretic particle deposition Propuls. Power Res. (IF 5.3) Pub Date : 2023-06-16 B.C. Prasannakumara, J.K. Madhukesh, G.K. Ramesh
The current work is being done to investigate the flow of nanofluids across a porous exponential stretching surface in the presence of a heat source/sink, thermophoretic particle deposition, and bioconvection. The collection of PDEs (partial differential equations) that represent the fluid moment is converted to a system of ODEs (ordinary differential equations) with the use of suitable similarity
-
Explanation of the mechanisms of unsteady gas flow through the turbocharger seal system, including thermal and structural interactions Propuls. Power Res. (IF 5.3) Pub Date : 2023-06-15 P. Novotný, P. Kudláček, J. Vacula
Gas flow in the seal system can be expected during the operation of a turbocharger and is associated with negative effects on the quality of the lubricant or turbocharger efficiency. Gas flow also affects particulate matter production due to lubricant entrainment in the compressor or turbine. The prediction of gas flow rates depends on many design parameters and the operating conditions of the turbocharger
-
A versatile volume-based modeling technique of distributed local quadratic convergence for aeroengines Propuls. Power Res. (IF 5.3) Pub Date : 2023-06-14 Yudong Liu, Min Chen, Hailong Tang
For advanced aero-engine design and research, modeling and simulation in a digital environment is indispensable, especially for engines of complicated configurations, such as variable cycle engines (VCE) and adaptive cycle engines (ACE). Also, in the research of future smart engines, reliable real-time digital twins are paramount. However, the 2 dominant methods that used in solving the simulation
-
Working state map of hydrocarbon fuels for regenerative cooling Propuls. Power Res. (IF 5.3) Pub Date : 2023-06-14 Chen Zhang, Hui Gao, Jiajun Zhao, Guice Yao, Dongsheng Wen
Regenerative cooling by endothermic hydrocarbon fuel (EHF) is one of the most promising techniques for thermal management of supersonic or hypersonic aircraft. How to maintain the fuel working in proper states is an important issue to maximize the cooling potential of EHT. This work proposes a novel working state map, including risking zone (RZ), thermal cracking zone (TCZ), supercritical zone (SupZ)
-
Numerical analysis of a double interlocking padded finger seal performance based on thermo-fluid-structure coupling method Propuls. Power Res. (IF 5.3) Pub Date : 2023-06-07 Hua Su, Yuhui Huang, Chao Wu
Non-contacting finger seals represent an advanced non-contacting and compliant seal in gas turbine sealing technology. This paper proposes a new structure of non-contacting finger seals with double interlocking pads. The numerical analysis model based on the thermo-fluid-structure coupling method for the new type finger seal was established. The influence of working conditions on leakage of the seal
-
Design of hypersonic wavecatcher intake at Mach 12 with rectangular-to-elliptical shape transition Propuls. Power Res. (IF 5.3) Pub Date : 2023-06-07 Feng-Yuan Zuo, Sannu Mölder
Wavecatcher (inward-turning) intake flows, at design Mach 12, are investigated numerically, to display the effect of wall temperature on flow structures and intake performance. Hypersonic experiments on shock wave/boundary layer interaction are used to validate the Spalart-Allmaras turbulence model for reproducing the features of hypersonic flow. Simulations of hypersonic intake flow are performed
-
Dissipative flow features of Carreau nanofluid with thermal radiation inside plane wall channel: Jeffery-Hamel analysis Propuls. Power Res. (IF 5.3) Pub Date : 2023-04-27 Sohail Rehman, , Fuad A.M. Al-Yarimi, Sultan Alqahtani, Mohammed Awad
The current article communicates a numerical investigation on laminar flow of dissipative generalized Newtonian Carreau nanofluid flowing through vertical conduit with converging and diverging plane walls. Thermal and concentration characteristics due to enthalpy change, activation energy, and non-linear thermal radiation have been examined in the presence of buoyancy forces. The channel walls for
-
Regression analysis and features of negative activation energy for MHD nanofluid flow model: A comparative study Propuls. Power Res. (IF 5.3) Pub Date : 2023-04-10 B. Kumar, , Abhinav Singhal, R. Nandkeolyar, Pulkit Kumar, Ali J. Chamkha
This article elucidates the impact of activation energy on magnetohydrodynamic (MHD) stagnation point nanofluid flow over a slippery surface in a porous regime with thermophoretic and Brownian diffusions. Negative activation energy is scarce in practice, but the impact of negative activation energy could not be neglected as it is noticed in chemical processes. The rate of some Arrhenius-compliant reactions
-
Static aeroelasticity of the propulsion system of ion propulsion unmanned aerial vehicles Propuls. Power Res. (IF 5.3) Pub Date : 2023-03-21 Shuai Hao, Tielin Ma, She Chen, Hongzhong Ma, Jinwu Xiang, Fangxiang Ouyang
“Ionic wind” generators are used as the main propulsion system in ion propulsion unmanned aerial vehicles (UAVs). Owing to the large size and poor stiffness of the electrode array in the propulsion system, the electrode array is prone to deformation under the flight load. In this work, the thrust characteristics and static aeroelastic properties of “ionic wind” propulsion systems were analyzed in detail
-
Research on combustion characteristics of scramjet combustor with different flight dynamic pressure conditions Propuls. Power Res. (IF 5.3) Pub Date : 2023-03-15 Junlong Zhang, Guangjun Feng, Haotian Bai, Kangshuai Lv, Wen Bao
Combustion characteristics in a scramjet combustor equipped with a thin strut were observed and discussed in this paper. A series of numerical simulations were carried out under different flight dynamic pressure conditions. The parameters of cold flow field and combustion field were used to analyze the combustion characteristics. Based on the basic data, the mixing efficiency, characteristics of flame
-
Novel concept of tailorable magnetic field and electron pressure distribution in a magnetic nozzle for effective space propulsion Propuls. Power Res. (IF 5.3) Pub Date : 2023-03-14 Lohit Malik
Magnetic nozzle appears to be a practical solution for prolonged space missions. For efficient handling of the spaceship, an in-flight solution to customize the thrust from the magnetic nozzle is essential. Here a new concept of three-thick coils system is proposed for tailoring the magnetic field in-flight in accordance with electron pressure distribution. The role of peak position of the pressure
-
Effects of multiple subcavities with floor subcavity in supersonic cavity flow Propuls. Power Res. (IF 5.3) Pub Date : 2023-03-13 Priyansh Jain, Anbarasan Sekar, Aravind Vaidyanathan
Experimental and computational analysis has been carried out by many researchers on supersonic cavity flow, but detailed analysis based on Rossiter's model still requires some insight. In the current study an open rectangular cavity with a length to depth ratio of 2 (L/D = 2) and Mach number at the inlet as 1.71, was considered as a baseline configuration for experimental analysis. Statistical techniques
-
Numerical and experimental investigation to design a novel morphing airfoil for performance optimization Propuls. Power Res. (IF 5.3) Pub Date : 2023-03-13 Kiumars Khani Aminjan, Maryam Ghodrat, Milad Heidari, Pooyan Rahmanivahid, Shayan Naghdi Khanachah, Mira Chitt, Juan Pablo Escobedo-Diaz
Optimizing flying objects' wing performance has attracted a significant attention in the last few decades. In this article, some of the main mechanisms for changing the geometry of the wing were investigated and a new mechanism is proposed to improve the aerodynamic performance of the airplane wing. The designs have been simulated and analyzed from both aerodynamic and control points of view. In aerodynamic
-
First thrust measurements in ionic multi-propeller rotational engines Propuls. Power Res. (IF 5.3) Pub Date : 2023-03-09 Adrian Ieta, Marius Chirita
Rotary ionic engines (RIEs) with multi-coaxial contra-rotating propellers (12.6 cm diameter) and their axial thrust are investigated in laboratory conditions, in air at atmospheric pressure, for the first time. The goal is to evaluate more advantageous configurations that may be scaled up and further help with development of rotary ionic drones. The propellers are designed with regular pin-emitter
-
Oxidation of norbornadiene: Theoretical investigation on H-atom abstraction and related radical decomposition reactions Propuls. Power Res. (IF 5.3) Pub Date : 2023-03-07 Jintao Chen, Mingxia Liu, Yuxiang Zhu, Kairu Jin, Zhenyu Tian, Lijun Yang, Chong-Wen Zhou
The chemical kinetics of hydrogen atom (H-atom) abstraction reactions from norbornadiene (NBD) by five radicals (H, O(3P), OH, CH3, and HO2), and the unimolecular reactions of three NBD derived radicals, were studied through high-level ab-initio calculations. The geometries optimization and vibrational frequencies calculation for all the reactants, transition states, and products were obtained at the
-
Micro gas turbine: Developments, applications, and key technologies on components Propuls. Power Res. (IF 5.3) Pub Date : 2023-03-04 Jingqi Li, Yulong Li
Owing to their precedent characteristics, micro gas turbines (MGTs) have been favored as popular power machinery in plenty of energy systems such as distributed energy systems, range extenders, solar power generations, fuel cell systems and individual power supplies. Their specific features essentially include but are not limited to strong fuel adaptability, low emissions, flexible structure, and easy
-
The azimuthal currents in the ion-driven magnetic nozzle Propuls. Power Res. (IF 5.3) Pub Date : 2022-12-20 Zhiyuan Chen, Yibai Wang, Haibin Tang, Junxue Ren, Min Li, Peng Wu, Jinbin Cao
Ion-driven magnetic nozzles (Ti > Te) are designed as intrinsic parts of cutting-edge propulsive technologies such as variable specific impulse magnetoplasma rockets (VASIMRs) and applied-field magnetoplasmadynamic thrusters. Employing a two-dimensional axisymmetric particle-in-cell (PIC) code, in the ion-driven magnetic nozzle, the compositions and distributions of azimuthal currents in different
-
Combustion performance of hybrid rocket fuels loaded with MgB2 and carbon black additives Propuls. Power Res. (IF 5.3) Pub Date : 2022-12-20 Yash Pal, Sasi Kiran Palateerdham, Sri Nithya Mahottamananda, Subha Sivakumar, Antonella Ingenito
Paraffin-based fuel has a great potential for several innovative missions, including space tourism, due to its safety, low environmental impact, high performance and low cost. Despite the fact that liquefying solid fuels increases the regression rate of hybrid rocket motors, incorporating energetic materials into solid fuel can still improve the performance. The objective and scope of this study is
-
Insight into the relationship between non-linear mixed convection and thermal radiation: The case of Newtonian fluid flow due to non-linear stretching Propuls. Power Res. (IF 5.3) Pub Date : 2022-12-20 Amit Kumar Pandey, Krishnendu Bhattacharyya, Anil Kumar Gautam, Sohita Rajput, Mani Shankar Mandal, Ali J. Chamkha, Dhananjay Yadav
The current research focuses the light on the characterization of buoyancy-driven non-linear mixed convection and non-linear radiation in a Newtonian flow over a non-linearly stretching vertical sheet, and this type of flow has useful applications in many industrial processes, such as the paper and pulp industry, polymer industry, electronic device cooling, solar collectors, gas turbine plants, and
-
Numerical investigation to evaluate the effects of gravity and pressure on flame structure and soot formation of turbulent non-premixed methane-air flame Propuls. Power Res. (IF 5.3) Pub Date : 2022-12-20 Subrat Garnayak, Amjad Ali Pasha, Radi Alsulami, Medhat A. Nemitallah, Abdul Gani Abdul Jameel, Sukanta K. Dash, V. Mahendra Reddy
In this study, a turbulent non-premixed (diffusion) methane-air flame has been investigated computationally to analyze the influences of pressure and gravity on flame structure and sooting characteristics between 1 and 10 atm. The simulation has been conducted in a 2-D axisymmetric computational domain using the finite volume-based computational fluid dynamics (CFD) code. The interaction of turbulence
-
Inclined magnetic field and variable viscosity effects on bioconvection of Casson nanofluid slip flow over non linearly stretching sheet Propuls. Power Res. (IF 5.3) Pub Date : 2022-12-17 Noman Sarwar, Muhammad Imran Asjad, Sajjad Hussain, Md. Nur Alam, Mustafa Inc
In pursuit of improved thermal transportation, the slip flow of Casson nanofluid is considered in the existence of an inclined magnetic field and radiative heat flux flow over a non-linear stretching sheet. The viscosity of the fluid is considered as a function of temperature along with the convective thermal boundary condition. Numerical solutions are obtained via Runge-Kutta along with the shooting
-
Significance of thermal stress in a convective-radiative annular fin with magnetic field and heat generation: application of DTM and MRPSM Propuls. Power Res. (IF 5.3) Pub Date : 2022-12-17 Ganeshappa Sowmya, Fehmi Gamaoun, Amal Abdulrahman, Ravikumar Shashikala Varun Kumar, Ballajja Chandrappa Prasannakumara
The present paper explains the temperature attribute of a convective-radiative rectangular profiled annular fin with the impact of magnetic field. The effect of thermal radiation, convection, and magnetic field on thermal stress distribution is also studied in this investigation. The governing energy equation representing the steady-state heat conduction, convection, and radiation process is transformed
-
Performance, emissions and exergy analyses of adding CNTs to various biodiesel feedstocks Propuls. Power Res. (IF 5.3) Pub Date : 2022-12-16 M.S. Gad, Mostafa M. Abdel Aziz, Hatem Kayed
Extraction of biodiesel from waste cooking oil, jatropha, and corn oils is done by transesterification. Diesel and biodiesel were blended at 20% volume ratio to make methyl ester. At doses of 25, 50, and 100 mg/l, carbon nanotubes (CNTs) was mixed with biodiesel blend. The objective of the present research is to examine experimentally a diesel engine performance, combustion characteristics, exergy
-
A novel approach for suppressing leakage flow through turbine blade tip gaps Propuls. Power Res. (IF 5.3) Pub Date : 2022-12-07 Tianyi Wang, Yimin Xuan
Tip clearance leakage flow of the turbine bade is an important factor limiting the augment of the high pressure turbine efficiency, which should be suppressed utilizing certain methods. However, the passive control method with the traditional structure is more and more difficult to satisfy the suppressing ability of the advanced turbine demand. In the present paper, a synergetic suppressing method
-
Impact of partial slip condition on mixed convection of nanofluid within lid-driven wavy cavity and solid inner body Propuls. Power Res. (IF 5.3) Pub Date : 2022-12-07 Ammar I. Alsabery, Mohammad H. Yazdi, Ali S. Abosinnee, Ishak Hashim, Evgeny Solomin
In thermofluid systems, the lid-driven square chamber plays an imperative role in analyzing thermodynamics’ first and second laws in limited volume cases executed by sheer effects with a prominent role in many industrial applications including electronic cooling, heat exchangers, microfluidic components, solar collectors, and renewable energies. Furthermore, nanofluids as working fluids have demonstrated
-
Overspeeding characteristics of turbomachinery for gas generator cycle air turbo ramjet engine Propuls. Power Res. (IF 5.3) Pub Date : 2022-12-06 Ryojiro Minato, Daisuke Nakata, Masaharu Uchiumi, Ryoji Imai, Kazuyuki Higashino
The main interest in the current study focuses on the possibility of overspeeding for the gas-generator cycle air turbo ramjet (GG-ATR) engine. The authors developed the air turbo ramjet engine and investigated its compressor performance. Based on those data, the authors developed the analytical code for the air turbo ramjet engine, which calculates the performances of turbomachinery, gas-generator
-
Nacelle intake flow separation reduction at cruise condition using active flow control Propuls. Power Res. (IF 5.3) Pub Date : 2022-09-22 Vinayak Ramachandran Nambiar, Vassilios Pachidis
Turbofan engine intakes are designed to provide separation-free flow at the fan face over a wide range of operating conditions. But at some off-design conditions, like at high flight speeds and high angles of attack (AoA), the aero engine intake may encounter flow separation. This boundary layer separation inside the nacelle inlet of an aircraft engine can lead to a large number of undesirable outcomes
-
Heat transfer attributes of Al2O3-Fe3O4/H2O hybrid nanofluid flow over a yawed cylinder Propuls. Power Res. (IF 5.3) Pub Date : 2022-09-15 P.M. Patil, H.F. Shankar
Flow over yawed and unyawed blunt bodies often occurs in various engineering applications. The fluid flow over a yawed cylinder explains the practical significance of subsea applications such as transference control, separating the boundary layer above submerged blocks, and suppressing recirculating bubbles. The current study uses viscous dissipation to analyze the mixed convective hybrid nanofluid
-
Artificial neural network analysis of the Nusselt number and friction factor of hydrocarbon fuel under supercritical pressure Propuls. Power Res. (IF 5.3) Pub Date : 2022-09-15 Kaihang Tao, Jianqin Zhu, Zeyuan Cheng, Dike Li
This paper presents the Nusselt number and friction factor model for hydrocarbon fuel under supercritical pressure in horizontal circular tubes using an artificial neural network (ANN) analysis on the basis of the back propagation algorithm. The derivation of the proposed model relies on a large number of experimental data obtained from the tests performed with the platform of supercritical flow and
-
Study of pressure surge during priming phase of start transient in an initially unprimed pump-fed liquid rocket engine Propuls. Power Res. (IF 5.3) Pub Date : 2022-09-13 Debanjan Das, P. Padmanabhan
In this paper, transient phenomenon during start up process of a pump fed liquid rocket engine is investigated through numerical simulation. The engine studied in this work is designed such that engine systems are not wetted with propellant until the engine is commanded to start. This is achieved by positioning the valves for propellant admission at the interface of test stand/flight stage and the
-
Entropy generation for mixed convection flow in vertical annulus with two regions hydromagnetic viscous and Cu-Ag water hybrid nanofluid through porous zone: a comparative numerical study Propuls. Power Res. (IF 5.3) Pub Date : 2022-09-10 T. Rahim, J. Hasnain, N. Abid, Z. Abbas
The primary determination of this study is a numerical investigation of the entropy generation (EG) in the steady two-region flow of viscous fluid and hybrid nanofluid (NF) in a long-infinite vertical annulus having a clear region as well as porous media. Stoke’s and single-phase NF models are used to study the viscous fluid and hybrid nanofluid (HNF) heat transfer developments, respectively. Two types
-
Low toxic nitromethane based monopropellant for gas generator cycle air turbo ramjet engine Propuls. Power Res. (IF 5.3) Pub Date : 2022-09-02 Ryojiro Minato
The present study proposes ethanol-nitromethane mixture as a safe, storable, and low toxic monopropellant for a gas generator cycle air turbo ramjet engine and evaluates its propulsion performance. The present study proposes that nitromethane is mixed with ethanol to adjust gas generator combustion temperature. The author developed the computational code for the present analysis and verified its accuracy
-
Advanced exergy analysis of the turbojet engine main components considering mexogenous, endogenous, exegenous, avoidable and unavoidable exergy destructions Propuls. Power Res. (IF 5.3) Pub Date : 2022-08-31 Hakan Caliskan, Selcuk Ekici, Yasin Sohret
In this study, exergy dynamic and advanced exergy analyses are applied to the turbojet engine to assess its mexogenous, endogenous, exogenous, avoidable and unavoidable exergies under the environment conditions of 15 °C temperature and 1 bar pressure. The maximum exergy point in the turbojet engine is found for the combustor in which C11H23 (Jet-A1) fuel is combusted with air, while the minimum one
-
Effect of windage heating on a micro high-speed rotor-stator cavity Propuls. Power Res. (IF 5.3) Pub Date : 2022-08-29 Jianyu Liu, Guoqiang Xu, Xi Zhao, Bensi Dong, Yongkai Quan
The main objective of this work is to investigate the effect of windage heating on the micro high-speed rotor-stator cavity. The influences of centrifugal force and spacing on the windage heating are analyzed with and without the change of gap ratio respectively. The results demonstrate that there is no difference in the flow structure between micro and large-scale rotor-stator cavities at the same
-
A review of cooling technologies for high temperature rotating components in gas turbine Propuls. Power Res. (IF 5.3) Pub Date : 2022-08-01 Umesh Unnikrishnan, Vigor Yang
Modern gas turbines work under demanding high temperatures, high pressures, and high rotational speeds. In order to ensure durable and reliable operation, effective cooling measures must be applied to the high-temperature rotating components, including turbine blades and turbine disks. Cooling technology, however, is one of the most challenging problems in this field. The present work reviews the current
-
Combined effects of Joule heating and non-uniform heat source/sink on unsteady MHD mixed convective flow over a vertical stretching surface embedded in a Darcy-Forchheimer porous medium Propuls. Power Res. (IF 5.3) Pub Date : 2022-06-29 B.K. Sharma, Rishu Gandhi
This paper deals with an unsteady magnetohydrodynamics (MHD) heat and mass transfer for a viscous incompressible fluid through a vertical stretching surface embedded in a Darcy-Forchheimer porous medium in the presence of a non-uniform heat source/sink and first-order chemical reaction. The porous surface is subjected to a uniform transverse magnetic field. The influence of velocity, thermal, and concentration