|
Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Engineering / Faculty of Engineering >
Peer-reviewed Journal Articles, etc >
Large eddy simulation on the unsteady aerodynamic response of a road vehicle in transient crosswinds
| Title: | Large eddy simulation on the unsteady aerodynamic response of a road vehicle in transient crosswinds |
| Authors: | Tsubokura, Makoto Browse this author →KAKEN DB | | Nakashima, Takuji Browse this author | | Kitayama, Masashi Browse this author | | Ikawa, Yuki Browse this author | | Doh, Deog Hee Browse this author | | Kobayashi, Toshio Browse this author |
| Keywords: | Aerodynamics | | Automobile | | Road Vehicle | | Wind | | Large Eddy Simulation (LES) | | Computational Fluid Dynamics (CFD) |
| Issue Date: | Dec-2010 |
| Publisher: | Elsevier |
| Journal Title: | International Journal of Heat and Fluid Flow |
| Volume: | 31 |
| Issue: | 6 |
| Start Page: | 1075 |
| End Page: | 1086 |
| Publisher DOI: | 10.1016/j.ijheatfluidflow.2010.05.008 |
| Abstract: | 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. First, the method was validated for a 1/20-scale wind-tunnel model in a static aerodynamic condition; this showed that the surface pressure distributions as well as the aerodynamic forces and moments were in good agreement with wind-tunnel data. Second, the method was applied to two transient crosswind situations: a sinusoidal perturbation representing the typical length scale of atmospheric turbulence and a stepwise crosswind velocity corresponding to wind gusts. Typical transient responses of the aerodynamic forces and moments such as phase shifting and undershooting or overshooting were observed, and their dependence on the frequency and amplitude of the input perturbation is discussed. Thus, the utility and validity of the large eddy simulation was demonstrated in the context that such transient aerodynamic forces are difficult to measure using a conventional wind tunnel. |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/49221 |
| Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
|
Submitter: 坪倉 誠
|
