Community Research and Development Information Service - CORDIS

Abstract

The goal of the project was to develop a computational turbulence model for the road-vehicle industries, which should make it possible to perform accurate and efficient computations of external flow over road vehicles. The research tasks consisted of developing, refining and validating advanced RANS models, supplemented with new experiments and Large Eddy Simulations (LES).

The focus of the development was especially the rear end of a car body, which greatly affects the vehicle drag. Model refinements were validated in several generic test flows relevant to vehicle aerodynamics where experimental data exist. New experimental data were also generated in two dedicated experiments: detailed mean flow and turbulence measurements in flow over a generic car afterbody (Ahmed car model) in a laboratory wind tunnel, and velocity and pressure measurement in flow over a simplified 1/5 scale car model (PSA model) in an industrial wind tunnel. The final validation of the developed models in both cases showed notably improved agreement with experiments, as compared with the standard linear eddy viscosity models.

Separately, a new unstructured finite-volume solver for Large Eddy Simulations (LES) was developed and used to simulate flow over a simplified car mirror.

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Record Number: 1875 / Last updated on: 2002-10-15
Category: PROJ