微细槽道隔热器流动及换热特性试验研究

Research on Experiment of Flow and Heat Transfer of a Micro Groove Thermal Shielding Radiator

提出采用经过特别设计的微细槽道在高温热源面和外界环境之间实现隔热,旨在实现冷热面大温差的同时,提升冷面的温度均匀性。试验首先探究了不同进出口方式(C型、Z型、Y型、I型、)对冷面温度均匀性及冷热面温差的影响,发现I型进出口时隔热效果最好。同时选择I型进出口条件下,在微细槽道散热器的槽道与密封盖中间增加空腔的隔热器进行试验研究,分析其流阻及传热和隔热特性。与传统槽道对比发现,带空腔的微细槽道隔热器流阻降低,且冷热两侧温差变大,冷面温度更均匀。

The thermal shielding,which had the specially designed micro groove radiator,can achieve thermal shielding between high temperature heat source surface and external environment it was proposed to achieve temperature uniformity with a large temperature difference between cold side and heat side.The effect of different inlet and outlet way(type C,Z,Y,and I)on cold side temperature uniformity and cold side and heat side temperature difference was experimentally studied.It was found that the optimal heat insulation was achieved when type I was applied.At the same time,for the type I inlet and outlet conditions,the flow resistance,heat transfer and heat insulation characteristics were experimental studied and analyzed both inside the traditional micro groove radiator and modified micro groove with a cavity between the channel and the sealing cover.The results showed that compared with the traditional groove,the flow resistance of the micro groove heat insulator with cavity was reduced,and the temperature difference between the cold side and hot side becomed larger,while the temperature on the cold surface was more uniform.