Abstract
The present study deals with the numerical study of the mixing process in a 2D supersonic ejector. The performance parameters such as momentum flux, degree of mixing and stagnation pressure loss are used to analyse mixing process. The evolution of the kinetic energy of turbulence is also observed. The investigation is carried out on a conventional 2D supersonic ejector and on a 2D supersonic ejector equipped with wall slot injectors along the mixing chamber. The performance parameters show a significant mixing enhancement when transverse micro-jets are used.
References
1. Addy A, Dutton J, Mikkelsen. Supersonic Ejector-Diffuser: Theory and experiments. Urbana: University of Illinois, 1981.Search in Google Scholar
2. Gutmark E, Schadow K, Yu K. Mixing enhancement in supersonic free shear flows. Annu Rev Fluid Mech. 1995;27:375–417.10.1146/annurev.fl.27.010195.002111Search in Google Scholar
3. Seiner JM, Dash SM, Kenzakowski DC. Historical survey on enhanced mixing in scramjet engines. J Propul Power. 2001;17:1273–86.10.2514/6.1999-4869Search in Google Scholar
4. Dandani M, Lepiller V, Ghezal A, Desevaux P. Numerical visualizations of mixing enhancement in 2D supersonic ejector. Fluid Dyn Mater Process. 2018;14:23–37.Search in Google Scholar
5. Hidetaka O, Hisashi H, Myeong-Kwan P, Shuzo O, Ryuichiro Y. Control of pseudoshock by slot injection. Int J Jpn Soc Mech Eng. 2002;45:150–7.Search in Google Scholar
6. Huang W. Transverse jet in supersonic crossflows. Aerosp Sci Technol. 2016;50:183–95.10.1016/j.ast.2016.01.001Search in Google Scholar
7. Zhang Y, Liu W, Wang B. Effects of oblique and transverse injection on the characteristics of jet in supersonic crossflow. Acta Astronaut. 2015;115:256–366.10.1016/j.actaastro.2015.06.004Search in Google Scholar
8. Ganesh R, Samitha ZA. Mixing enhancement in supersonic coaxial flows with angle rear wall cavity using clover nozzle. Int J Sci Eng Res. 2013;4.Search in Google Scholar
9. Sumesh V, Arackal RS, Balachandran P, Samitha ZA, Fazil M. Numerical and experimental investigations of the nozzle geometry in supersonic mixing. J Innovative Res Sci Eng Technol. 2013;2:824–31.Search in Google Scholar
10. Samitha ZA, Swaraj Kumar B, Balachandran P Experimental study on supersonic mixing using clover nozzle. AIAA 2007:839.Search in Google Scholar
11. Bouhanguel A. Etude numérique et expérimentale de l’interaction entre deux écoulements compressibles dans un éjecteur supersonique. PhD thesis, University of Franche-Comté, 2013.Search in Google Scholar
12. Bouhanguel A, Desevaux P, Gavignet E. Visualization of flow instabilities in supersonic ejectors using Large Eddy Simulation. J Visualization. 2015;18:17–9.10.1007/s12650-014-0231-4Search in Google Scholar
13. Dvořák V. Shape optimization of supersonic ejector for supersonic wind tunnel. Appl Comput Mech. 2010;4:15–24.Search in Google Scholar
14. Dvořák V, Dančova P, švarc P Experimental investigation into flow in an ejector with four synthetic jets. EPJ Web of Conferences 2012:25.10.1051/epjconf/20122502003Search in Google Scholar
15. Desevaux P, Marynowski T, Khan M. CFD prediction of supersonic ejectors performance. Int J Turbo Jet Eng. 2006;23:173–81.10.1515/TJJ.2006.23.3.173Search in Google Scholar
16. Desevaux P, Bouhanguel A, Girardot L, Gavignet E. On the use of laser tomography for validating CFD simulations of the flow in supersonic ejectors. Int J Fluid Mech Res. 2013;40:60–70.10.1615/InterJFluidMechRes.v40.i1.50Search in Google Scholar
17. Bouhanguel A, Desevaux P, Khan M Numerical design study of an axial probe for pressure measurement in supersonic air ejector. ISFV15, Barcelona, February 2014.Search in Google Scholar
18. Dandani M, Ghezal A, Bouhanguel A, Lepiller V, Desevaux P Caractérisation du mélange dans un éjecteur supersonique destiné à la réfrigération solaire. Revue des Energies Renouvelables, Spécial ICT3-MENA. 2015:35–42Search in Google Scholar
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