Hostname: page-component-8448b6f56d-c47g7 Total loading time: 0 Render date: 2024-04-24T00:07:52.859Z Has data issue: false hasContentIssue false
  • English
  • Français

Effects of forebody boundary layer on the performance of a submerged inlet

Published online by Cambridge University Press:  11 March 2021

W.Z. Xie Open the ORCID record for W.Z. Xie [Opens in a new window] ,
S.Z. Yang Open the ORCID record for S.Z. Yang [Opens in a new window] ,
C. Zeng ,
K. Liao ,
R.H. Ding ,
L. Zhang  and
S. Guo
W.Z. Xie*
Affiliation:
College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, Jiangsu, People’s Republic of China
S.Z. Yang
Affiliation:
College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, Jiangsu, People’s Republic of China
C. Zeng
Affiliation:
College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, Jiangsu, People’s Republic of China
K. Liao
Affiliation:
College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, Jiangsu, People’s Republic of China
R.H. Ding
Affiliation:
College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, Jiangsu, People’s Republic of China
L. Zhang
Affiliation:
College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, Jiangsu, People’s Republic of China
S. Guo
Affiliation:
Louisiana State University, Baton Rouge, Louisiana, USA
*
xie_wenzhong@126.com
Get access Rights & Permissions [Opens in a new window]

Abstract

The use of a submerged inlet is advantageous in modern aircrafts because of its low drag resistance, small radar cross section and ease of maintenance. Although it is well known that the forebody boundary layer deteriorates the aerodynamic performance of a submerged inlet, the level of impact has not yet been fully quantified. To quantify the forebody boundary-layer effect, a submerged diverter was designed to remove a portion of the low-energy boundary flow. The flow pattern and aerodynamic performance of a submerged inlet, with and without the diverter, were investigated by wind-tunnel experimentation and numerical simulations. The effects of mass flow, free stream speed, angle-of-attack and sideslip angle on the aerodynamic characteristics of the inlet with and without the submerged diverter were studied, over an operating envelope of M0 = 0.3 ∼ 0.6, $\alpha$ = –6$^{\circ}$ ∼ 8$^{\circ}$ and $\beta$ = 0$^{\circ}$ ∼ 4$^{\circ}$. The results indicate that both the total pressure loss and the circumferential distortion can be significantly reduced with the removal of the forebody boundary-layer low-energy flow. Meanwhile, the main mechanisms for losses in the submerged inlet were also analysed.

Keywords

Subsonic flowSubmerged inletForebody boundary layerSubmerged diverterWind tunnel experiment
Type
Research Article
Information
The Aeronautical Journal , Volume 125 , Issue 1289 , July 2021 , pp. 1260 - 1281
Check for updates
Copyright
© The Author(s), 2021. Published by Cambridge University Press on behalf of Royal Aeronautical Society

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Shi, L. and Guo, R.W. Electromagnetic scattering of a submerged inlet, Acta Aeronaut Astronaut Sin, September 2008, 29, (5), pp 1098–1104.Google Scholar
Frick, C.W., Davis, W.F., Randall, L.M. and Mossman, E.A. An experimental investigation of NACA submerged-duct entrances, NACA ACR-5120, November 1945.Google Scholar
Seddon, J. and Goldsmith, L. Intake Aerodynamics, Blackwell Science, London, 1999, pp 338–340.10.2514/4.473616CrossRefGoogle Scholar
Guo, R.W. and Liu, S.Y. Design of submerged inlet, J Nanjing Univ Aeronaut Astronaut, February 2002, 33, (1), pp 8–12.Google Scholar
Yu, A.Y. A study of the design and flow characteristics for a submerged inlet under a stealthy shaped fuselage, Ph.D. Dissertation, Nanjing University of Aeronautics and Astronautics, Nanjing/Jiangsu, PRC, February 2003.Google Scholar
Wang, Y.W., Wang, C.H., Xiao, Y.C., Chen, B., Zhou, S., Guo, J.T. and Sun, M.W. Construction methodology for lip surface of a submerged inlet, Aerosp Sci Technol, May 2016, 54, pp 340–352.10.1016/j.ast.2016.04.029CrossRefGoogle Scholar
Sun, S., Guo, R.W. and Wu, Y.Z. Characterization and performance enhancement of submerged inlet with flush-mounted planar side entrance, J Propuls Power, September 2007, 23, (5), pp 987–995.10.2514/1.26432CrossRefGoogle Scholar
Piegl, L. and Tiller, W., The NURBS Book, Springer–Verlag, Heidelberg, 1997, pp 117.10.1007/978-3-642-59223-2_4CrossRefGoogle Scholar
Prez, C.C., Ferreira, S.B., Da Silva, L.F.F., De Jesus, A.B. and Oliveira, G.L. Computational study of submerged air inlet performance improvement using vortex generators, J Aircr, September 2007, 44, (5), pp 1574–1587.10.2514/1.25036CrossRefGoogle Scholar
Sun, S., Tan, H.J. and Wang, C.X. Submerged inlet performance enhancement using a unique bump-shaped vortex generator, J Propuls Power, July 2016, 32, (5), pp 1275–1280.10.2514/1.B36085CrossRefGoogle Scholar
Cheng, D.S., Tan, H.J., Sun, S. and Tong, Y. Computational study of a high-performance submerged inlet with bleeding vortex, J Aircr, May 2012, 49, (3), pp 852–860.10.2514/1.C031483CrossRefGoogle Scholar
Taskinoglu, E.S. and Knight, D. Multi-Objective shape optimization study for a subsonic submerged inlet, J Propuls Power, May 2004, 20, (4), pp 620–633.10.2514/1.5809CrossRefGoogle Scholar
Jovanovic, V.J., Taskinoglu, E.S., Knight, D. and Elliott, G.S. Experimental investigation of a submerged subsonic inlet, J Propuls Power, August 2006, 22, (1), pp 214–216.10.2514/1.15765CrossRefGoogle Scholar
Sun, S. and Guo, R.W. Numerical analysis and experimental validation of a submerged inlet on the plane surface, Chinese J Aeronaut, August 2005, 18, (3), pp 199–205.10.1016/S1000-9361(11)60298-7CrossRefGoogle Scholar
Seddon, J. and Goldsmith, E.L. Intake Aerodynamics, AIAA Education Series, Collins Professional and Technical Books, AIAA, New York, 1985, pp 363–403.Google Scholar
Rein, M. and Koch, S. Experimental study of boundary-layer ingestion into a diverterless S-duct intake, AIAA J, September 2015, 53, (11), pp 3487–3491.10.2514/1.J053902CrossRefGoogle Scholar
Menter, F.R., Two-equation eddy-viscosity turbulence model for engineering applications, AIAA J, November, 1994, 32, (8), pp. 1598–1605.10.2514/3.12149CrossRefGoogle Scholar
Xie, L.R. and Guo, R.W. Design and experimental study of an s-shaped inlet restricted by missile, Acta Aerodyn Sin, March 2006, 24, (1), pp 95–101.Google Scholar
Wan, D.W., Guo, R.W., Ai, Q. and Pan, S.Y. Design and experimental study of an s-shaped inlet, J Nanjing Univ Aeronaut Astronaut, April 2004, 36, (2), pp 150–154.Google Scholar
Sun, S. and Guo, R. Serpentine inlet performance enhancement using vortex generator based flow control, Chin. J Aeronaut, February 2006, 19, (1), pp 10–17.10.1016/S1000-9361(11)60261-6CrossRefGoogle Scholar
Da, X.Y., Fan, Z.L., Fan, J.C., Zeng, L.Q., Rui, W. and Zhou, R. Microjet flow control in an ultra-compact serpentine inlet, Chin. J Aeronaut, August 2015, 25, (8), pp 1381–1390.10.1016/j.cja.2015.07.008CrossRefGoogle Scholar
Maghsoudi, I., Vaziry, M.A. and Mahmoodi, M. Experimental investigation of flow and distortion mitigation by mechanical vortex generators in a coupled serpentine inlet-turbofan engine system, Chin. J Aeronaut, February 2020, 33, (5), pp 1375–1391.10.1016/j.cja.2019.12.002CrossRefGoogle Scholar