A large eddy simulation method based on a fully unstructured finite volume method was developed, and the unsteady aerodynamic response of a road vehicle subjected to transient crosswinds was investigated. The method was first validated on the 1/20-scale wind tunnel model at a static aerodynamic condition and showed good agreement in the surface pressure distributions. The method was then applied to two transient crosswind situations: a sinusoidal perturbation representing the typical length scale of atmospheric turbulence, and a stepwise crosswind velocity corresponding to a wind gust. Typical transient responses of the aerodynamic forces and moments such as phase shifting and undershoot or overshoot were observed, and their dependence on the frequency and amplitude of the input perturbation is discussed. As a result, the utility and validity of LES is demonstrated in the context that such transient aerodynamic forces are difficult to measure in the conventional wind tunnel measurements.
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ASME 2010 3rd Joint US-European Fluids Engineering Summer Meeting collocated with 8th International Conference on Nanochannels, Microchannels, and Minichannels
August 1–5, 2010
Montreal, Quebec, Canada
Conference Sponsors:
- Fluids Engineering Division
ISBN:
978-0-7918-4948-4
PROCEEDINGS PAPER
Large-Eddy Simulation on the Effect of Ambient Perturbation on Vehicle Aerodynamics Available to Purchase
Makoto Tsubokura,
Makoto Tsubokura
Hokkaido University, Sapporo, Hokkaido, Japan
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Yuki Ikawa,
Yuki Ikawa
Hokkaido University, Sapporo, Hokkaido, Japan
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Masashi Kitayama,
Masashi Kitayama
Fuji Heavy Industries Ltd., Ota, Gunma, Japan
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Takuji Nakashima
Takuji Nakashima
Hiroshima University, Higashi Hiroshima, Hiroshima, Japan
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Makoto Tsubokura
Hokkaido University, Sapporo, Hokkaido, Japan
Yuki Ikawa
Hokkaido University, Sapporo, Hokkaido, Japan
Masashi Kitayama
Fuji Heavy Industries Ltd., Ota, Gunma, Japan
Takuji Nakashima
Hiroshima University, Higashi Hiroshima, Hiroshima, Japan
Paper No:
FEDSM-ICNMM2010-30570, pp. 2623-2632; 10 pages
Published Online:
March 1, 2011
Citation
Tsubokura, M, Ikawa, Y, Kitayama, M, & Nakashima, T. "Large-Eddy Simulation on the Effect of Ambient Perturbation on Vehicle Aerodynamics." Proceedings of the ASME 2010 3rd Joint US-European Fluids Engineering Summer Meeting collocated with 8th International Conference on Nanochannels, Microchannels, and Minichannels. ASME 2010 3rd Joint US-European Fluids Engineering Summer Meeting: Volume 1, Symposia – Parts A, B, and C. Montreal, Quebec, Canada. August 1–5, 2010. pp. 2623-2632. ASME. https://doi.org/10.1115/FEDSM-ICNMM2010-30570
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