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2018 | OriginalPaper | Chapter

On the Influence of Underhood Flow on External Aerodynamics of the DrivAer Model

Authors: Christopher Collin, Jörg Müller, Moni Islam, Thomas Indinger

Published in: Progress in Vehicle Aerodynamics and Thermal Management

Publisher: Springer International Publishing

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Abstract

The interaction of underhood flow with external aerodynamics is part of the main topics for the development of automotive aerodynamics. In particular, the location and design of cooling air exits as well as the mass flow through the radiator package are considered to be important factors. The DrivAer is an open-source, aerodynamic reference model, which has a realistic overall geometry compared to rather simple, generic shapes such as the SAE body. The model is flexible in use as it provides different rear end and wheel designs. The open-grille upgrade of the DrivAer enhances the potential of the body towards a reference model for more detailed, open cooling investigations.
In the present study, the 40% scale Mock-Up DrivAer model of the Technical University of Munich was upgraded with underhood flow for wind tunnel tests with moving ground simulation. The wind tunnel measurements covered different underhood flow configurations including variations for the pressure drop of the radiator package and different locations for cooling air exits – both for different rear end shapes of the model. Additionally, the effect of underhood flow on the aerodynamics of both the notchback and the estateback rear end were calculated for six different radiator packages using DDES simulations with OpenFOAM®.

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Metadata
Title
On the Influence of Underhood Flow on External Aerodynamics of the DrivAer Model
Authors
Christopher Collin
Jörg Müller
Moni Islam
Thomas Indinger
Copyright Year
2018
DOI
https://doi.org/10.1007/978-3-319-67822-1_14

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