Simulation and Optimization of Heat Dissipation Performance of a Commercial Vehicle Brake Disc

The heat dissipation characteristics of the vehicle brake disc makes significant impact on the strength and life of the brake disc. This article established a fluid simulation model for a commercial vehicle brake disc to calculate the heat transfer coefficients of the brake disc outer surface and ventilated channel wall surface [1, 2]. To verify the effectiveness of the fluid simulation model and results, the author established a brake disc heat dissipation simulation model and obtained temperature data from corresponding bench test, then compared the temperature results of the simulation and the test. Comparing the convective heat transfer characteristics of two commercial vehicle brake discs by the verified simulation model, the better performing brake disc would be the optimization object to be optimized the convective heat transfer performance of its ventilated channel [3]. In this article, the optimization was consisted of four stages and more than sixty schemes, using five indicators for schemes evaluation. Based on the number of the schemes and computing time, the author adopted periodic boundary condition simulation for schemes selection. Ultimately determined the ventilated channel with five circumferential dimensions and twenty-four groups of rhombus ribs arranged as the final ventilated channel optimization scheme which possessed the optimal convective heat transfer performance in the planned schemes.