Detached-Eddy Simulation of Vortex Generator Jet Using Chimera Grids
This paper aims at numerically analysing the effect
of an active flow control (AFC) by a vortex generator jet (VGJ)
submerged in a boundary layer via Chimera Grids and Detached-
Eddy Simulation (DES). The performance of DES results are
judged against Reynolds-Averaged Navier-Stokes (RANS) and
compared with the experiments that showed an unsteady vortex
motion downstream of VGJ. Experimental results showed that
the mechanism of embedding logitudinal vortex structure in the
main stream flow is quite effective in increasing the near wall
momentum of separated aircraft wing. In order to simulate such
a flow configuration together with the VGJ, an efficient numerical
approach is required. This requirement is fulfilled by performing
the DES simulation over the flat plate using the DLR TAU Code.
The DES predictions identify the vortex region via smooth hybrid
length scale and predict the unsteady vortex motion observed in
the experiments. The DES results also showed that the sufficient
grid refinement in the vortex region resolves the turbulent scales
downstream of the VGJ, the spatial vortex core postion and nondimensional
momentum coefficient RVx .
[1] X. Zhang, Co and Contrarotaing Streamwise Vortices in a Turbulent
Boundary Layer, Journal of Aircraft, September-October 1995, Vol. 32,
No. 5, pp. 1095-1101.
[2] J. Ortmanns, C.J. K¨ahler, A Single Round Vortex Generator Jet at High
Reynolds Number, FLUCOME 2007, Tallahassee, Florida, USA.
[3] J. Ortmanns, Aktive Grenzschichtbeeinflussung mittels pneumatischer
Wirbelgeneratoren bei groen Reynoldszahlen, Institut f¨ur
Str¨omungsmechanik, TU Braunschweig, Dissertation ZLRForchungsbericht
2009-03.
[4] S. Mahmood, R. Radespiel, RANS simulation of jet actuation in a
boundary layer flow using Chimera grids, Deutscher Luft- und Raumfahrtkongress
2009, September 8-10, Aachen, 2009.
[5] P. R. Spalart, Young person-s guide to detached-eddy simulation grids,
NASA CR-2001-211032.
[6] P. R. Spalart, S. Deck, M. Shur, K.D. Squires, M. Strelets, A. Travin,
A new version of detached-eddy simulation, resistant to ambiguous grid
densities, Theoretical and Computational Fluid Dynamics, Vol. 20, No.
3, pp. 181-195, 2006.
[7] S. Deck, E. Garnier, Detached and large eddy simulation of unsteady
side-loads over an axisymmetric afterbody. Proceedings of 5th European
Symposium on aerothermodynamics for space vehicles. Cologne,
Germany, November 8-11, 2004.
[8] C. P. Mellen, J. Fr¨ohlich, W. Rodi, Lessons from the European LESFOIL
project on LES of flow around an airfoil, AIAA Journal, Vol. 41, No.
4, pp. 573-581, 2003.
[9] A. Travin, M. Shur, P.R. Spalart, M. Strelets, Improvement of delayed
detaced-eddy simulation for LES with wall modelling, ECCOMAS
CFD 2006. In: Wesseling, P., O˜nate,E., P'eriaux, J. (Eds.), Proceedings
(CDROM) of the European Conference on Computational Fluid Dynamics
ECCOMAS CFD 2006, Egmond aan Zee, The Netherlands.
[10] M. Shur, P. R. Spalart, M. Strelets, A. Travin, A hybrid RANSLES
approach with delayed-DES and wall-modelled LES capabilities,
International Journal of Heat and Fluid Flow 29 (2008)1638 − 1649.
[11] P. R. Spalart, W.-H. Jou, M. Strelets, S.R. Allmaras, Comments on the
feasibility of LES for wings, and on a hybrid RANS/LES approach,
First AFOSR International Conference on DNS/LES, August 4-8, 1997,
Ruston, Louisiana.
[12] P. R., Spalart, Strategies for turbulence modelling and simulations, Int.
J. Heat Fluid Flow, 21, 252−263 (2000).
[13] M. Strelets, Detached Eddy Simulation of massively separated flows,
AIAA Paper, AIAA − 2001 − 879 (2001).
[14] T. Gerhold, O. Friedrich, J. Evans, M. Galle, Calculation of Complex
Three-Dimensional Configurations Employing the DLR TAU-Code,
1997, AIAA-paper 97-0167.
[15] D. Schwamborn, T. Gerhold, R. Heinrich, The DLR TAU-Code: Recent
applications in research and industry, ECCOMAS CFD 2006 CONFERENCE,
September 04-08, 2006, Netherlands.
[16] A. Madrane, A. Raichle, A. Stuermer, Parallel implementation of a dynamic
overset unstructured grid approach, ECCOMAS 2004, Jyv¨askyl¨a,
July 24-28, 2004.
[17] T. Schwarz, An Interpolation Method Maintaining the Wall Distance for
Structured and Unstructured Overset Grids. In: Proceedings of the CEAS
2009 conference. CEAS 2009 European Air and Space Conference,
October 26-29, 2009, Manchester, UK.
[18] Commercial CFD software package by POINTWISE, Inc.
http://www.pointwise.com/gridgen
[19] Norddeutscher Verbund f¨ur Hoch und H¨ochsleistungsrechnen,
http://www.hlrn.de, 2011.
[20] P. Spalart, and S. Allmaras, A one-equation turbulence model for
aerodynamic flows, La Recherche Aerospatiale, 1994, pp. 5-21.
[21] F. MENTER, Improved two-equation turbulence models for aerodynamic
flows, 1992, Tech. Report TM 103975, NASA, NASA Langley
Research Center, Hampton, VA 23681-2199.
[1] X. Zhang, Co and Contrarotaing Streamwise Vortices in a Turbulent
Boundary Layer, Journal of Aircraft, September-October 1995, Vol. 32,
No. 5, pp. 1095-1101.
[2] J. Ortmanns, C.J. K¨ahler, A Single Round Vortex Generator Jet at High
Reynolds Number, FLUCOME 2007, Tallahassee, Florida, USA.
[3] J. Ortmanns, Aktive Grenzschichtbeeinflussung mittels pneumatischer
Wirbelgeneratoren bei groen Reynoldszahlen, Institut f¨ur
Str¨omungsmechanik, TU Braunschweig, Dissertation ZLRForchungsbericht
2009-03.
[4] S. Mahmood, R. Radespiel, RANS simulation of jet actuation in a
boundary layer flow using Chimera grids, Deutscher Luft- und Raumfahrtkongress
2009, September 8-10, Aachen, 2009.
[5] P. R. Spalart, Young person-s guide to detached-eddy simulation grids,
NASA CR-2001-211032.
[6] P. R. Spalart, S. Deck, M. Shur, K.D. Squires, M. Strelets, A. Travin,
A new version of detached-eddy simulation, resistant to ambiguous grid
densities, Theoretical and Computational Fluid Dynamics, Vol. 20, No.
3, pp. 181-195, 2006.
[7] S. Deck, E. Garnier, Detached and large eddy simulation of unsteady
side-loads over an axisymmetric afterbody. Proceedings of 5th European
Symposium on aerothermodynamics for space vehicles. Cologne,
Germany, November 8-11, 2004.
[8] C. P. Mellen, J. Fr¨ohlich, W. Rodi, Lessons from the European LESFOIL
project on LES of flow around an airfoil, AIAA Journal, Vol. 41, No.
4, pp. 573-581, 2003.
[9] A. Travin, M. Shur, P.R. Spalart, M. Strelets, Improvement of delayed
detaced-eddy simulation for LES with wall modelling, ECCOMAS
CFD 2006. In: Wesseling, P., O˜nate,E., P'eriaux, J. (Eds.), Proceedings
(CDROM) of the European Conference on Computational Fluid Dynamics
ECCOMAS CFD 2006, Egmond aan Zee, The Netherlands.
[10] M. Shur, P. R. Spalart, M. Strelets, A. Travin, A hybrid RANSLES
approach with delayed-DES and wall-modelled LES capabilities,
International Journal of Heat and Fluid Flow 29 (2008)1638 − 1649.
[11] P. R. Spalart, W.-H. Jou, M. Strelets, S.R. Allmaras, Comments on the
feasibility of LES for wings, and on a hybrid RANS/LES approach,
First AFOSR International Conference on DNS/LES, August 4-8, 1997,
Ruston, Louisiana.
[12] P. R., Spalart, Strategies for turbulence modelling and simulations, Int.
J. Heat Fluid Flow, 21, 252−263 (2000).
[13] M. Strelets, Detached Eddy Simulation of massively separated flows,
AIAA Paper, AIAA − 2001 − 879 (2001).
[14] T. Gerhold, O. Friedrich, J. Evans, M. Galle, Calculation of Complex
Three-Dimensional Configurations Employing the DLR TAU-Code,
1997, AIAA-paper 97-0167.
[15] D. Schwamborn, T. Gerhold, R. Heinrich, The DLR TAU-Code: Recent
applications in research and industry, ECCOMAS CFD 2006 CONFERENCE,
September 04-08, 2006, Netherlands.
[16] A. Madrane, A. Raichle, A. Stuermer, Parallel implementation of a dynamic
overset unstructured grid approach, ECCOMAS 2004, Jyv¨askyl¨a,
July 24-28, 2004.
[17] T. Schwarz, An Interpolation Method Maintaining the Wall Distance for
Structured and Unstructured Overset Grids. In: Proceedings of the CEAS
2009 conference. CEAS 2009 European Air and Space Conference,
October 26-29, 2009, Manchester, UK.
[18] Commercial CFD software package by POINTWISE, Inc.
http://www.pointwise.com/gridgen
[19] Norddeutscher Verbund f¨ur Hoch und H¨ochsleistungsrechnen,
http://www.hlrn.de, 2011.
[20] P. Spalart, and S. Allmaras, A one-equation turbulence model for
aerodynamic flows, La Recherche Aerospatiale, 1994, pp. 5-21.
[21] F. MENTER, Improved two-equation turbulence models for aerodynamic
flows, 1992, Tech. Report TM 103975, NASA, NASA Langley
Research Center, Hampton, VA 23681-2199.
@article{"International Journal of Mechanical, Industrial and Aerospace Sciences:63806", author = "Saqib Mahmood and Rolf Radespiel", title = "Detached-Eddy Simulation of Vortex Generator Jet Using Chimera Grids", abstract = "This paper aims at numerically analysing the effect
of an active flow control (AFC) by a vortex generator jet (VGJ)
submerged in a boundary layer via Chimera Grids and Detached-
Eddy Simulation (DES). The performance of DES results are
judged against Reynolds-Averaged Navier-Stokes (RANS) and
compared with the experiments that showed an unsteady vortex
motion downstream of VGJ. Experimental results showed that
the mechanism of embedding logitudinal vortex structure in the
main stream flow is quite effective in increasing the near wall
momentum of separated aircraft wing. In order to simulate such
a flow configuration together with the VGJ, an efficient numerical
approach is required. This requirement is fulfilled by performing
the DES simulation over the flat plate using the DLR TAU Code.
The DES predictions identify the vortex region via smooth hybrid
length scale and predict the unsteady vortex motion observed in
the experiments. The DES results also showed that the sufficient
grid refinement in the vortex region resolves the turbulent scales
downstream of the VGJ, the spatial vortex core postion and nondimensional
momentum coefficient RVx .", keywords = "VGJ, Chimera Grid, DES, RANS.", volume = "5", number = "7", pages = "1532-8", }
