Browse Publications Technical Papers 2016-01-1603

The Effects of Cooling Air on the Flow Field around a Vehicle 2016-01-1603

Cooling air flow is an important factor when it comes to vehicle performance and operating safety. In addition, it is closely linked to vehicle aerodynamics. In recent years more and more effort is being spent to optimize the losses generated by the flow through the vehicle. Grille shutters, better sealing and ducting are only some examples for innovations in this field of work, resulting in a lower contribution of the cooling air flow to overall drag.
But cooling air not only affects the internal flow of the vehicle but also changes the flow around it. This paper will show changes in the flow field around the generic DrivAer model resulting from cooling air flow, especially in the wake behind the car and in the region around the front wheels. The results were gathered using PIV measurements, multi-hole-probe measurements and pitot tube measurements in the 1:4 model scale wind tunnel of IVK University of Stuttgart. Unless stated otherwise, all the measurements were conducted with rotating wheels and ground simulation. Additionally, CFD simulations were performed using the Lattice-Boltzmann solver Exa PowerFLOW. These simulations allow an even closer look at the flow field around the vehicle, especially in the under-floor region that is hardly accessible in measurement.


Subscribers can view annotate, and download all of SAE's content. Learn More »


Members save up to 18% off list price.
Login to see discount.
We also recommend:

Vehicle Aerodynamics Simulation for the Next Generation on the K Computer: Part 2 Use of Dirty CAD Data with Modified Cartesian Grid Approach


View Details


Design and Numerical Analysis of an Under Tray Diffuser of a Formula Student Car for Performance Improvement


View Details


Experimental & Computational Simulations Utilized During the Aerodynamic Development of the Dodge Intrepid R/T Race Car


View Details