The present paper describes a computational approach to automotive brake disk cooling. CFD software PowerFLOW 4.0 was used to simulate a fully detailed vehicle including the engine compartment featuring a self ventilated brake disk. Wheel rotation was taken into account by employing Multiple Reference Frames. Cooling-down times were computed using a simplified lumped model equation. Compared to wind tunnel experiments, the resulting cooling-down times were predicted to be about 35 % too high while all tendencies could be verified. Neglected radiation and conduction are supposed to adjust the cooling down times since this could be verified for the baseline configuration. Therefore, the simplified lumped model is expected to be sufficient when aiming for an improvement of the convective cooling. It is also shown that CFD enables to observe different disk surfaces parts to identify where, why and how much heat is transferred. Furthermore, CFD can provide a deeper view into the wheel house flow and help to understand the mechanism of brake cooling and to improve it.
Brake disk cooling CFD-simulation and validation
Numerische Strömungssimulation und Validierung der Kühlung von Fahrzeugbremsscheiben
2008
10 Seiten, 14 Bilder, 12 Quellen
Aufsatz (Konferenz)
Englisch
F2008-12-061 BRAKE DISK COOLING CFD-SIMULATION AND VALIDATION
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