Experimental and Numerical Simulation of the Flow Around the Brake Disk of a Scaled-Down VW Phaeton Model 2007-01-3949
In this paper, the experimental and numerical simulation of the flow field in the simplified front wheel arch of a scaled-down VW Phaeton half-model (scale 1:2,5) is presented. For wind tunnel experiments a realistic, rotating wheel model with plexiglass treads (PMMA) was designed. The construction allowed for detailed measurements of the flow field directly at the brake disk by means of the stereoscopic Particle Image Velocimetry (PIV) technique. The formation of the flow structures and the resulting three-dimensional boundary layers on the brake disk are analyzed. Furthermore, the oncoming air flow towards the brake disk and the flow field near the wheel rim openings were investigated. The experimental data is compared with results of Computational Fluid Dynamics (CFD) simulations using the Lattice-Boltzmann based solver Powerflow. The validation shows the potential and the limitations of the numerical approach and indicates areas of further improvement.
Citation: Dreyer, M., Radespiel, R., Körner, M., and Decker, F., "Experimental and Numerical Simulation of the Flow Around the Brake Disk of a Scaled-Down VW Phaeton Model," SAE Technical Paper 2007-01-3949, 2007, https://doi.org/10.4271/2007-01-3949. Download Citation
Martin Dreyer, Rolf Radespiel, Matthias Körner, Friedhelm Decker
Technical University of Braunschweig, Volkswagen AG
25th Annual Brake Colloquium
SAE 2007 Transactions Journal of Passenger Cars: Mechanical Systems-V116-6