提出了利用水力空化效应抑制微通道流动沸腾不稳定性的方法并进行了实验验证。实验研究结果表明, 在微通道入口设置了空化结构后, 在加热量较大的变动范围内可以保持稳定的流动沸腾。基于这一研究结果, 开发了一种采用水力空化效应的单bar条微通道相变热沉, 并对单bar条微通道相变热沉进行了热工参数、电光参数以及最大散热能力测试。测试结果表明当输出光功率达到70 W左右时, 光电效率达到最大值, 且其最大散热能力超过了100 W(发热热流密度870 W/cm2)。

A method of inhibiting the flow boiling instability in microchannel with the hydrodynamic cavitation effect was promoted and it was proved by experiment as well. According to experimental results, cavitation structure at the entrance of microchannel benefits to the stability of flow boiling with great range of heating input. Based on this result, a microchannel phase change heat sink with single bar by using of the hydrodynamic cavitation effect was developed, and its thermal parameters, electric-optical parameters and maximum heat dissipation potential were also tested. According to the experimental data, when the output power was about 70 W, the photoelectric efficiency achieved the maximum value, and the largest heat dissipation capacity of the heat sink exceeded 100 W whose heat flux density was 870 W/cm2.