HPC-LES for the Prediction of Unsteady Aerodynamic Forces on a Vehicle in a Gusty Cross-flow Condition

Document Number: 2008-01-3001

Date Published: December 2008

Author(s):
Makoto Tsubokura - Hokkaido Univ.
Takuji Nakashima - Hiroshima Univ.
Takeshi Ikenaga - Hiroshima Univ.
Keiji Onishi - AdvanceSoft Corporation
Kozo Kitoh - Kozo Kitoh Technology
Nobuyuki Oshima - Hokkaido Univ.
Toshio Kobayashi - Univ. of Tokyo

Abstract:
The objective of this study is to develop numerical models for the analysis of unsteady vehicle aerodynamics and vehicle motion in gusty crosswind conditions. Several numerical models of transient crosswind gust are proposed and validated on a simplified 2D rectangle, moving at the constant speed, then entering the crosswind region. It is shown that one of the methods called "convective crosswind method" is a promising candidate to accurately describe the dynamics of flow in crosswind. The model is applied to a formula car, and the unsteady aerodynamics acting during the sudden crosswind condition is investigated.

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See other papers presented at Motorsports Engineering Conference & Exposition, December 2008, Concord, NC, USA, Session: Aerodynamics - Computational Methods and Modeling - Part 2

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