风冷散热器仿真中对流换热系数的计算方法

Computation Method of Convection Heat Transfer Coefficient Applying for Air-cooling Dadiator in Temperature Field Simulation Analysis

对风冷散热器进行温度场仿真,需要计算对流换热系数的值。根据导热理论,建立功率半导体器件及其散热器风冷的物理模型,给出对流换热系数的计算公式,以及干空气不同温度条件下计算公式中各参数的取值表,提出仿真时对流换热系数的调整流程。通过仿真和实验,验证了对流换热系数计算方法和调整方法的正确性。

For the thermal field simulation of air-cooling radiation,the value of convection heat transfer coefficient needs to be calculated.According to the theory of thermal conduction,the paper establishes power semiconductor device and its physical model of air-cooling radiation,provides the formula of convection heat transfer coefficient and its parameters table of dry air on different conditions.It provides flow chart of convection heat transfer coefficient on simulation.The simulation and experiment verify the calculation formula of convection heat transfer coefficient and the validity of adjustment method.