不锈钢-气氮板式热沉仿真研究

目的研究不锈钢-气氮板式热沉中,氮气压力、氮气入口流速以及热沉自身流道深度对热沉传热性能的影响。方法利用AnsysFluent软件,对板式热沉壁面温度分布情况以及进出口压力损失进行模拟仿真。结果提高氮气压力和氮气入口速度可以提升热沉的温度均匀性,但热沉进出口压力损失也会增大。对于气氮-板式热沉而言,流道深度的改变对热沉温度均匀性的影响不大,但流道深度较小时,进出口压力损失较大。结论建议在设计气氮-板式热沉时,流道深度选择在8~10 mm,外流程中氮气压力控制在0.3~0.4 MPa,氮气流速控制在20 m/s为宜。

Simulation Study of Stainless Steel-Gas Nitrogen Plate Heat Sink

The paper aims to study the effect of nitrogen pressure, nitrogen inlet flow rate and the depth of the heat sink channel on the heat transfer performance of the heat sink in the stainless steel-gas nitrogen heat plate heat sink. Ansys Fluent software was used to simulate the wall surface temperature distribution as well as inlet and outlet pressure loss of the plate heat sink. The temperature uniformity of heat sink could be improved by increasing nitrogen pressure and nitrogen inlet velocity, but the loss of heat sink inlet and outlet pressure would also increase. For gas-nitrogen plate heat sink, the change of channel depth had little effect on the uniformity of heat sink temperature, but when the channel depth was small, the pressure loss of inlet and outlet was large. It is suggested that when designing the gas-nitrogen plate heat sink, the flow channel depth should be selected from 8 mm to 10 mm; in the external process, the nitrogen pressure should be controlled between 0.3 MPa and 0.4 MPa, and the nitrogen flow rate should be controlled at 20 m/s.