Large Eddy Simulation Investigation of the Hysteresis Effects in the Flow Around an Oscillating Ground Vehicle-Reference-Cited by-同舟云学术

Large Eddy Simulation Investigation of the Hysteresis Effects in the Flow Around an Oscillating Ground Vehicle

Published:2011-12-01 Issue:12 Volume:133 Page:
ISSN:0098-2202
Container-title:Journal of Fluids Engineering
language:en
Short-container-title:

Author:

Krajnović Siniša¹,Bengtsson Anders¹,Basara Branislav²

Affiliation:

1. Division of Fluid Dynamics, Department of Applied Mechanics, Chalmers University Of Technology, SE-412 96 Gothenburg, Sweden

2. AVL List GmbH, Advanced Simulation Technologies, A-8010 Graz, Austria

Abstract

This paper presents large eddy simulations (LES) of flow around a simplified vehicle model oscillating around its vertical axis. The frequency of the Strouhal number St = 0.068 and a relatively small amplitude of the oscillation are chosen to be representative for the crosswind conditions of vehicles on the road. The results were found to agree well with data from previous experimental investigations. Furthermore, the differences in LES flows between quasi-steady and dynamic flow conditions are presented and underlying flow mechanisms are explored. The cause of the phenomena of hysteresis and phase shift was found in the inertia of the flow to adjust to sudden changes in the direction of the oscillation of the body.

Publisher

ASME International

Subject

Mechanical Engineering

Link

http://asmedigitalcollection.asme.org/fluidsengineering/article-pdf/doi/10.1115/1.4005260/5521193/121103_1.pdf

Reference26 articles.

1. LES of Flows Around Ground Vehicles and Other Bluff Bodies;Krajnović;Philos. Trans. R. Soc. London, Ser. A

2. Numerical Simulation of The Flow Around a Aimplified Vehicle Model With Active Flow Control;Krajnović;Int. J. Heat Fluid Flow

3. LES of the Flow Around a Generic Wheel in a Wheelhouse;Krajnović

4. Transient Nature of Wind Gust Effects on an Automobile;Beauvais

5. Theoretical Prediction of the Aerodynamic Derivatives of a Vehicle in Cross Wind Gusts;Hucho

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