This paper presents a thermo-fluid dynamic analysis in a micro-textured evaporator for loop heat pipes (LHPs) that has a super wetting surface with ethanol on the basis of an experiment and modeling. In the experiment, three kinds of stainless steel plates with various morphologies of heat transfer surfaces were tested: a normal flat plate, a sandblasted plate, and a micro-groove plate. The measured contact angles between the surfaces and ethanol were 8.2° ± 1.3°, 0°, and 0°, respectively. Evaluation of the heat transfer performance and liquid-vapor interface behavior was conducted using microscale infrared and visible observations. As a result, it was revealed that the sandblasted plate and the micro-groove plate showed 7 times and 20 times higher heat transfer coefficient under high heat flux conditions respectively, compared with the normal flat plate. Different liquid-vapor interface behaviors were found between the plate types. In the modeling, the heat transfer coefficient was predicted for each case. It was found that nucleate boiling heat transfer induced by rough surface increased the heat transfer performance in the case of the sandblasted plate. In addition, it was revealed that the thin film evaporation at the long triple-phase contact line significantly enhanced heat transfer performance in the case of the micro-groove plate. The findings indicate a new promising approach to enhance the heat transfer coefficient of LHP evaporators.

本文基于实验和建模，介绍了具有乙醇超湿表面的环路热管（LHP）的微织构蒸发器中的热流体动力学分析。在实验中，测试了三种具有各种传热表面形态的不锈钢板：普通平板，喷砂板和微槽板。测得的表面与乙醇之间的接触角分别为8.2°±1.3°，0°和0°。传热性能和液-气界面行为的评估是使用微型红外和可见观测进行的。结果表明，在高热通量条件下，喷砂板和微槽板的传热系数分别高出7倍和20倍，与普通平板相比。在板类型之间发现了不同的液-气界面行为。在建模中，可以预测每种情况的传热系数。发现在喷砂板的情况下，由粗糙表面引起的核沸腾传热提高了传热性能。另外，发现在微槽板的情况下，长的三相接触线处的薄膜蒸发显着增强了传热性能。这些发现表明增加LHP蒸发器的传热系数的一种新的有希望的方法。发现在喷砂板的情况下，由粗糙表面引起的核沸腾传热提高了传热性能。另外，发现在微槽板的情况下，长的三相接触线处的薄膜蒸发显着增强了传热性能。这些发现表明增加LHP蒸发器的传热系数的一种新的有希望的方法。发现在喷砂板的情况下，由粗糙表面引起的核沸腾传热提高了传热性能。另外，发现在微槽板的情况下，长的三相接触线处的薄膜蒸发显着增强了传热性能。这些发现表明增加LHP蒸发器的传热系数的一种新的有希望的方法。