水冷盘式制动器散热结构优化

为提高水冷盘式制动器散热性能,基于强化对流传热原理,通过添加扰流柱对制动器散热结构进行优化,设计了4种扰流柱散热结构,运用CFD方法模拟制动盘流固耦合传热过程,采用Fluent软件进行热流固耦合仿真计算,获得制动盘温度特性和换热特性以及流动阻力特性,并使用综合性能评价因子对不同扰流柱散热结构进行评价。结果表明:通过在安装盘水槽内添加扰流柱可以有效地提高水冷盘式制动器的散热效果;在相同的工作条件下,正三角形扰流柱散热结构的盘面温度最低,平均努塞尔数与流动阻力最高,其综合散热性能较圆形、椭圆形以及水滴形扰流柱散热结构分别提高了3.4%,2.4%和4.4%,较无扰流柱散热结构提高了6.7%,正三角形扰流柱散热结构具有更好的综合散热性能。研究结果为水冷盘式制动器散热结构的优化设计提供了参考。

Heat Dissipation Structure Optimization of Water-cooled Disc Brake

In order to improve the heat dissipation performance of water-cooled disc brakes, it is proposed to optimize the heat dissipation structure of the brake by adding pin fin based on the principle of enhanced convection heat transfer, four types of pin fin heat dissipation structures are designed. The fluid-structure coupling heat transfer process of the brake disc is simulated by the CFD method, and the thermal-fluid-solid coupling calculations are simulated in Fluent to obtain temperature characteristics, heat transfer characteristics of the brake disc and flow resistance characteristics, and efficiency index was used to evaluate the different pin fin heat dissipation structures. The results show that the heat dissipation effect of the water-cooled disc brake can be effectively improved by adding pin fin in the installation pan sink; the regular triangular pin fin heat dissipation structure has the lowest disc surface temperature and the best heat transfer efficiency and the highest friction factor in the same working conditions. The efficiency index of the heat dissipation structure with triangular pin fins can increase by 3.4%, 2.4%, 4.4%, 6.7%, comparing to the circular, oval, drop-shaped and non-pin fin heat dissipation structure. Therefore, the regular triangle pin fin heat dissipation structure has better comprehensive heat dissipation performance, the results provide a reference for the optimal design of the heat dissipation structure of the water-cooled disc brake.