Hostname: page-component-78c5997874-4rdpn Total loading time: 0 Render date: 2024-11-08T02:43:50.176Z Has data issue: false hasContentIssue false
  • English
  • Français

Large-eddy simulation of twin impinging jets in cross-flow

Published online by Cambridge University Press:  03 February 2016

Q. Li ,
G. J. Page  and
J. J. McGuirk
Q. Li
Affiliation:
Loughborough University, Department of Aeronautical and Automotive Engineering, Leicestershire, UK
G. J. Page
Affiliation:
Loughborough University, Department of Aeronautical and Automotive Engineering, Leicestershire, UK
J. J. McGuirk
Affiliation:
Loughborough University, Department of Aeronautical and Automotive Engineering, Leicestershire, UK
Get access Rights & Permissions [Opens in a new window]

Abstract

The flow-field beneath a jet-borne vertical landing aircraft is highly complex and unsteady. large-eddy simulation is a suitable tool to predict both the mean flow and unsteady fluctuations. This work aims to evaluate the suitability of LES by applying it to two multiple jet impingement problems: the first is a simple twin impinging jet in cross-flow, while the second includes a circular intake. The numerical method uses a compressible solver on a mixed element unstructured mesh. The smoothing terms in the spatial flux are kept small by the use of a monitor function sensitive to vorticity and divergence. The WALE subgrid scale model is utilised. The simpler jet impingement case shows good agreement with experiment for mean velocity and normal stresses. Analysis of time histories in the jet shear layer and near impingement gives a dominant frequency at a Strouhal number of 0·1, somewhat lower than normally observed in free jets. The jet impingement case with an intake also gives good agreement with experimental velocity measurements, although the expansion of the grid ahead of the jets does reduce the accuracy in this region. Turbulent eddies are observed entering the intake with significant swirl. This is in qualitative agreement with experimental visualisation. The results show that LES could be a suitable tool when applied to multiple jet impingement with realistic aircraft geometry.

Type
Research Article
Information
The Aeronautical Journal , Volume 111 , Issue 1117 , March 2007 , pp. 195 - 206
Copyright
Copyright © Royal Aeronautical Society 2007 

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

1. Curtis, P., A review of the status of ground effect/environment technologies, No 2002-5985, November 2002, 2002 Biennial International Powered Lift Conference and Exhibit, November 2002, Williamsburg, Virginia, USA.Google Scholar
2. Seddon, J. and Goldsmith, E., Intake Aerodynamics, Blackwell Science Ltd, 1999, 2nd ed.Google Scholar
3. Page, G.J., Mcguirk, J.J., Harper, L.R. and Penrose, C.J., Application of computational fluid dynamics to hot gas ingestion modelling, August 1998, Proceedings of the Royal Aeronautical Society International Powered Lift Conference, London, UK.Google Scholar
4. Chaderjian, N.M., Pandya, S.A., Ahmed, J.U. and Murman, S.M., progress toward generation of a Navier-Stokes database for a Harrier in ground effect, No. 2002-5966, November 2002, 2002 Biennial International Powered Lift Conference and Exhibit, Williamsburg, Virginia, USA.Google Scholar
5. Pandya, S.A., Murman, S.M. and Sankaran, V., Unsteady computations of a jet in crossflow with ground effect, No 2003-3890, June 2003, 33rd AIAA Fluid Dynamics Conference and Exhibit, Orlando, Florida, USA.Google Scholar
6. Barata, J., Durao, D., Heitor, M. and Mcguirk, J., Impingement of single and twin turbulent jets through a crossflow, AIAA J, April 1991, 29, (4), pp 595–602.Google Scholar
7. Behrouzi, P. and Mcguirk, J., Experimental data for CFD validation of the intake ingestion process in STOVL aircraft, J Flow Turbulence and Combustion, 2000, 64, pp 233–251.Google Scholar
8. Krothapalli, A., Rajkuperan, E., Alvi, F. and Lourenco, L., Flow field and noise characteristics of A supersonic impinging jet, J Fluid Mechanics, 1999, 392, pp 155–181.Google Scholar
9. Cabrita, P., Saddington, A. and Knowles, K., Unsteady features of twin-jet STOVL ground effects, No 2002-6014, 2002 Biennial International Powered Lift Conference and Exhibit, November 2002, Williamsburg, Virginia, USA.Google Scholar
10. Alkislar, M., Krothapalli, A., Choutapalli, I. and Lourenco, L., Structure of supersonic twin jets, AIAA J, November 2005, 43, (11), pp 2309–2318.Google Scholar
11. Lou, H., Alvi, F.S. and Shih, C., Active and passive control of supersonic impinging jets, AIAA J, January 2006, 44, (11), pp 58–66.Google Scholar
12. Childs, R. and Nixon, D., Unsteady three-dimensional simulations of a VTOL upwash fountain, No 86-0202, AIAA 24th Aerospace Sciences Meeting, 6–9 January 1986, Reno, Nevada, USA.Google Scholar
13. Childs, R., Nixon, D., Kuhn, G. and Perkins, S. Further studies of impinging jet phenomena, No 87-0017, January 1987, AIAA 25th Aerospace Sciences Meeting, 12-15 January 1987, Reno, Nevada, USA.Google Scholar
14. Rizk, M. and Menon, S., An investigation of excitation effects on a row of impinging jets using large-eddy simulations, No 88-0043, January 1988, AIAA 26th Aerospace Sciences Meeting, 11-14 January, 1988, Reno, Nevada, USA.Google Scholar
15. Page, G.J., Li, Q. and Mcguirk, J.J., Les of impinging jet flows relevant to vertical landing aircraft, No 2005-5226, 2005, 23rd AIAA Applied Aerodynamics Conference, 6–9 June 2005, Toronto, Ontario, Canada.Google Scholar
16. Tristanto, I.H., Li, Q., Page, G.J. and Mcguirk, J.J., On the effect of convective flux formation for LES of compressible flows using hybrid unstructured meshes, No 2006-54940, 2006, 36TH AIAA Fluid Dynamics Conference, 5–8 June 2006, San Francisco, California, USA.Google Scholar
17. Richardson, G., Dawes, W. and Savill, M., Unsteady, moving mesh CFD simulation applied to Harrier VSTOL aircraft for hot-gas ingestion control analysis, Aeronaut J, March 2007, 111, (1115).Google Scholar
18. Crumpton, P.I., Moinier, P., and Giles, M.G., An unstructured algorithm for high Reynolds number flows on highly stretched grids, 1997, Tenth International Conference on Numerical Methods for Laminar and Turbulent Flow.Google Scholar
19. Moinier, P., Algorithm Developments for an Unstructured Viscous Flow Solver, PhD thesis, University of Oxford, 1998.Google Scholar
20. Ducros, F., Ferrand, V., Nicoud, F., Weber, C., Darracq, D., Gacheriu, C. and Poinsot, T., Large-eddy simulation of the shock/turbulence interaction, J Computational Physics, 1999, 152, pp 517–549.Google Scholar
21. Gottlieb, S. and Shu, C.W., Total variation diminishing Runge-Kutta Schmes, Tech Rep 96-50, ICASE, 1996.Google Scholar
22. Nicoud, F. and Ducros, F., Subgrid-scale stress modelling based on the square of the velocity gradient tensor, flow, Turbulence and Combustion, 1999, 62, pp 183–200.Google Scholar
23. Jeong, J. and Hussein, F., On the identification of a vortex, J Fluid Mechanics, 1995, 285, pp 69–94.Google Scholar
24. Bogey, C. and Bailly, C., Effects of inflow conditions and forcing on subsonic jet flow and noise, AIAA J, 2005, 4, pp 1000–1007.Google Scholar