微通道迎流角对自相似热沉性能的影响

Effects of the Incidence Angle on the Performance of a Self-similarity Heat Sink

自相似微通道热沉(Self-similarity heat sink,SSHS)综合性能优于一般的微通道热沉,在电子芯片冷却领域有很大应用前景,但SSHS原型结构存在内部流量分配及散热不均等问题,需要在研制过程中进一步改进。本文将SSHS原结构中直微通道设计改为锯齿形微通道,通过数值模拟方法对改进设计进行了验证,并以SSHS中的一个换热单元为研究对象,分析了锯齿形通道迎流角对SSHS内部流动和传热过程的影响。

Self-similarity heat sink shows better overall performance than the conventional micro- channel heat sinks leading a great potential for practical applications. As an inherent defect of the original SSHS, the maldistribution inside the SSHS deteriorates the heat transfer process, which should be resolved as much as possible. The zigzag micro-channel structure is applied in the structure design of the SSHS to replace the straight micro-channel structure. The numerical simulation work was carried out to validate the new design. A single heat transfer unit for different incidence angle was simulated to analyze the effects of the incidence angle （α） on the flow and heat transfer process inside the SSHS.