Numerical Simulation On The Water-cooled Heat Sink For High-power Semiconductor

This paper mainly studies the cooling problems of IGBT on the CRH2locomotive converter.The water-cooled programme is eventally regarded as the best one after comparing each other among many cooling schemes. This main design of heat sink is given out according to the working conditions of cooling system. This paper design the heat sink’s size, structure and internal channel layout and optimize structure of it,elect the heat sink’s material and calculate in theory the circling water preesure loss.the And the FLUENT software is uesd for numerical simulation to verify the accuracy, reliability of this design and to ensure that it can be applied in practice perfectly.By using numerical simulation technology this paper acheive many relevant datas such as:the flow field distribution of temperature, velocity, pressure and turbulent flow distribution.Then optimize the design of structure by adding disturbing columns, and analysis optimum disturbing columns arrangement according to the different situation. Reach thier respective resluts about tmperature,pressure,velocity distribution picture and analyse the reason why these are, to find the various facotrs effecting the cooling results.According to the different situations analyze the optimum disturbing columns arrangment.And the reslut is that the crossing arrangment is better than the sequential arrangment,latter has more sufficient turbulent flow distribution which is the most important one among many factors effecting cooling system.Finally demonstrate the coolant entrance flow velocity how to affect the cooling effect in detail by using numerical simulation software-FLUENT,and draw the corresponding reliable conclusions.