This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
On CFD and Transient Flow in Vehicle Aerodynamics
Technical Paper
2000-01-0873
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Event:
SAE 2000 World Congress
Language:
English
Abstract
The accuracy of computational fluid dynamics, CFD, has improved considerably over the years but still, large errors are present and vehicle parameters such as drag and lift are often poorly predicted.
The current work is investigating how transient CFD would cope with a very complex flow structure around a surface mounted cube. A transient Reynolds averaged Navier Stokes model, RANS model, is presented together with a large eddy simulation model, LES model. Furthermore, two “industrial like” test cases have been simulated using a transient RANS model.
Recommended Content
Citation
Perzon, S. and Davidson, L., "On CFD and Transient Flow in Vehicle Aerodynamics," SAE Technical Paper 2000-01-0873, 2000, https://doi.org/10.4271/2000-01-0873.Also In
References
- Adams S. The Dilbert future Thriving on stupidity in the 21 st century 1st HarperCollins Publishers Inc. 0-88730-866-X 1997
- Aoki K. Ohbayashi T. Zhu M. Miyata H. 1993 Finite-volume simulation of 3-D vortical flow-fields about road vehicles with various after-body configuration SAE technical paper 931896
- Axelsson, N. Ramnefors, M. Gustafson, R. 1998 Accuracy in Computational Aerodynamics, Part 1: Stagnation Pressure SAE Technical Paper 980037
- Duell E. G. George A. R. 1992 Unsteady wakes of three dimensional bodies, In Bluff-body wakes, dynamics and instabilities Eckelmann et. al. Springer-Verlag 1992 293 296
- Garry K. P. Macklin A. R. van Opstal E. P. E. 1994 Measurement of transient aerodynamic loads on bluff bodies at extreme yaw angles, In Vehicle aerodynamics The Royal Aeronautical society, Loughborough Univ. Of Tech. UK July 18 19 1994
- Horinouchi N. Kato Y. Shinano S. Kondoh T. Tagayashi Y. 1995 Numerical investigation of vehicle aerodynamics with overlaid grid system SAE technical paper 950628
- Hucho W.-H. 1998 Aerodynamics of road vehicles 4th 0-7680-0029-7 SAE
- Ishihara Y. Takagi M. 1999 Unsteady pressure analysis of the wake flow behind a passanger car model SAE technical paper 990810
- Jones, W. P. Launder, B. E. 1972 The prediction of laminarization with a two-equation model of turbulence Int. J. of Heat and Mass Transfer 15 310 314
- Kataoka T. China H. Nakagawa K. Yanagimoto K. Yoshida M. 1991 Numerical simulation of road vehicle aerodynamics and effect of aerodynamic devices SAE technical paper 910597
- Krajnovic S. Davidson L. 1999 Large eddy simulation of the flow around a surface mounted cube using a one-equation subgrid model first international symp. on turbulence and shear flow phenomena Santa Barbara Sept 12-15 1999
- Martinuzzi R. Tropea C. 1993 The Flow Around a Surface-Mounted, Prismatic Obstacles Placed in a Fully Developed Channel Flow J. Fluids Eng. 85 91 115 March
- Murakami S. 1998 Overview of turbulence models applied in CWE-1997 J. of Wind Eng. and Industrial Aerodynamics 74-76 1 24
- Perzon, S. 1997 Reynolds Stress Modeling of Flow Separation on Curved Surfaces Chalmers University of Technology Göteborg, Sweden
- Perzon, S. Sjögren, T. Jönson, A. 1998 Accuracy in Computational Aerodynamics, Part 2: Base pressure SAE Technical Paper 980038
- Perzon S. Janson J. Höglin L. 1999 On comparisons between CFD methods and wind tunnel tests on a bluff body SAE technical paper 990805
- Ramnefors, M. Bensryd, R. Holmberg, E. Perzon, S. 1996 Accuracy of Drag Predictions on Cars Using CFD - Effect of Grid Refinement and Turbulence Models SAE Technical Paper 960681
- Shih, T. H. Zhu, J. Lumley, J. L. 1993 A realizable Reynolds stress algebraic equation model NASA tech. Memo. 105993
- Smagorinsky J. Manabe S. Halloway J. L. 1965 Numerical results from a nine-level general circulation model of the atmosphere Monthly weather review 93 Dec 1965 727 768
- Summa J. M. 1992 Steady and unsteady computational aerodynamics simulations of the Corvette ZR-1 SAE technical paper 921092
- Tsuboi K. Shirayama S. Oana M. Kuwahara K. 1988 Computational study of the effect of base slant In 2 nd International Conference on supercomputing in the automotive industry Seville Spain
- Yamada A. Ito S. 1993 Computational analysis of flow around a simplified vehicle-like body SAE technical paper 930293