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Numerical investigation of the role of hyper-mixers in supersonic mixing

Published online by Cambridge University Press:  03 February 2016

S. L. N. Desikan ,
K. Kumaran  and
V. Babu
S. L. N. Desikan
Affiliation:
Department of Aerospace Engineering, IIT Madras Chennai, India
K. Kumaran
Affiliation:
Department of Aerospace Engineering, IIT Madras Chennai, India
V. Babu
Affiliation:
[email protected], Department of Mechanical Engineering, IIT Madras Chennai, India
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Abstract

In this numerical study, the role of hyper-mixers on supersonic mixing is investigated for six different strut configurations. To this end, 3D, compressible, turbulent, non-reacting flow calculations with air as the secondary injectant have been carried out. A qualitative comparison of the predictions with experimental results is made through Schlieren and Mie scattering images. A quantitative evaluation of the predictions is made by comparison with experimentally measured exit stagnation pressure, wall static pressure and the degree of unmixedness. Based on these results, three strut configurations have been selected for carrying out simulations with hydrogen as the injectant. Results from the hydrogen simulations are compared with the predictions using air and also across the strut configurations. The results clearly demonstrate that castellated strut configurations are very effective in enhancing mixing in such high speed flows.

Type
Research Article
Information
The Aeronautical Journal , Volume 114 , Issue 1161 , November 2010 , pp. 659 - 672
Copyright
Copyright © Royal Aeronautical Society 2010 

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References

1. Rajasekaran, A and Babu, V.. Numerical simulation of three-dimensional reacting Flow in a model supersonic combustor, J Propulsion and Power, 2006, 22, (4), pp 820–827.Google Scholar
2. Manna, P., Behera, R. and Chakraborty, D. Liquid-fueled strut-based scramjet combustor design: A computational fluid dynamics approach, J Propulsion and Power, 2008, 24, (2), pp 274–281 Google Scholar
3. Hsu, K.K., Carter, C.D., Gruber, M.R. and Tam, C.J.. Mixing study of strut Injectors in supersonic flows, AIAA -2009-5226.Google Scholar
4. Tomioka, S., Kobayashi, K., Kudo, K., Murakami, A. and Kanda, T.. Performance of supersonic combustors with fuel injection in diverging section, J Propulsion and Power, 2006, 22, (1), pp 111–119.Google Scholar
5. Owens, M.G., Segal, C. and Auslender, A.H.. Effects of mixing schemes on kerosene combustion in a supersonic airstream, J Propulsion and Power, 1997, 13, (4), pp 525–531.Google Scholar
6. Karagozian, A.R., Wang, K.C., Le, A.T. and Smith, O.I.. Transverse gas injection behind a rearward-facing step, J Propulsion and Power, 1996, 12, (6), pp 1129–1136.Google Scholar
7. Ben-Yakar, A. and Hanson, R.K.. Cavity flame-holders for ignition and flame stabilisation in scramjets: An overview, J Propulsion and Power, 2001, 17, (4), pp 869–877.Google Scholar
8. Gruber, M.R., Baurle, R.A., Mathur, T. and Hsu, K.Y.. Fundamental studies of cavity-based flameholder concepts for supersonic combustors, J Propulsion and Power, 2001, 17, (1), pp 146–153.Google Scholar
9. Gruber, M.R., Donbar, J.M., Carter, C.D. and Hsu, K.Y.. Mixing and combustion studies using cavity-based flameholders in a supersonic flow, J Propulsion and Power, 2004, 20, (5), pp 769–778.Google Scholar
10. Donohue, J.M., McDaniel, J.C. and Haj-Hariri, H.. Experimental and numerical study of swept ramp injection into a supersonic flow field, AIAA J, 1994, 32, (9), pp 1860–1867.Google Scholar
11. Fuller, R.P., Wu, P.K., Nejad, A.S. and Schetz, J.A.. Comparison of physical and aerodynamic ramps as fuel injectors in supersonic flow, J Propulsion and Power, 1998, 14, (2), pp 135–145.Google Scholar
12. Wilson, M.P., Bowersox, R.D.W. and Glawe, D.D.. Experimental investigation of the role of downstream ramps on a supersonic injection plume, J Propulsion and Power, 1999, 15, (3), pp 432–439.Google Scholar
13. Bogdanoff, D.W.. Advanced injection and mixing techniques for scramjet combustors, J Propulsion and Power, 1994, 10, (2), pp 183–190.Google Scholar
14. Gruenig, C., Avrashkov, V. and Mayinger, F.. Fuel injection into a supersonic airflow by means of pylons, J Propulsion and Power, 2000, 16, (1), pp 29–34.Google Scholar
15. Tew, D.E., Waitz, I.A. and Hermanson, J.C.. Streamwise vorticity enhanced mixing downstream of lobed mixers, AIAA-95-2746, 1995.Google Scholar
16. Sunami, T., Wendt, M.N. and Nishioka, M.. Supersonic mixing and combustion control using streamwise vortices, AIAA-1998-3271, 1998 Google Scholar
17. Kodera, M., Sunami, T. and Sheel, F.. Numerical study on the supersonic mixing enhancement using streamwise vortices, AIAA-2002-5117, 2002 Google Scholar
18. Clemens, N.T. and Mungal, M.G.. Two and three dimensional effects in the supersonic mixing layers, AIAA J, 1992, 20, (4), pp 973–981.Google Scholar
19. Papamoschou, D.. Effect of three dimensionality on compressible mixing layers, J Propulsion and Power, 1992, 8, (1), pp 247–249.Google Scholar
20. Desikan, S.L.N. and Kurian, J.. Strut-based gaseous injection into a supersonic stream, J Propulsion and Power, 2006, 22, (2), pp 474–477.Google Scholar
21. Menter, F.R.. Zonal two equation k-ω models for aerodynamic flows, AIAA-93-2906, 1993.Google Scholar
22. Bradshaw, P., Ferriss, D.H. and Atwell, N.P.. Calculation of boundary-layer development using the turbulent energy equation, J Fluid Mechanics, 1967, 28, (3), pp 593–616.Google Scholar
23. Baurle, R.A. and Eklund, D.R.. Analysis of dual-mode hydrocarbon scramjet operation at Mach 4-6.5, J Propulsion and Power, 2002, 18, (5), pp 990–1002.Google Scholar
24. Rajasekaran, A. and Babu, V.. On the effect of Schmidt and Prandtl numbers in the numerical predictions of supersonic combustion, AIAA paper 06-5037, 2006.Google Scholar
25. Desikan, S.L.N. and Kurian, J.. Mixing studies in supersonic flow employing strut based hypermixers, AIAA Paper 2005-3643, 2005.Google Scholar
26. Baurle, R.A., Mathur, T., Gruber, M.R. and Jackson, K.R.. A Numerical and experimental investigation of a scramjet combustor for hypersonic missile applications, AIAA Paper 98-3121, 1998.Google Scholar