中文摘要：

为解决环路热管运行温度波动和传输距离有限的问题,设计一套泵辅助毛细相变回路。实验测试表明,在设计传输距离为2 m,测试热负荷10~140 W,对应热流密度1~13.8 W/cm~2时,系统运行平稳,未出现温度波动。根据蒸发器出口蒸气是否过热,将系统运行特性曲线划分为两个区间,在蒸气过热段,加热面温升较快。蒸发器受热面等温性较好,在实验热负荷范围,加热面测点间最大温差小于1.5℃。随热负荷的增大,蒸发器热阻呈先减小后增大的变化趋势。

英文摘要：

A pump-assisted capillary phase change loop was designed to solve the problems of temperature oscillation and limited heat transfer distance in loop heat pipe. The test results indicated that no temperature oscillation was observed with the heat load ranging from 10~140 W （heat flux of 1～13.8 W/cm2） for a heat transfer distance of 2 m. According to the vapor at the evaporator outlet being in the superheated state or not being in the superheated state, the steady-state operation characteristics of the pump-assisted capillary phase change loop can be divided into two different modes. When the heat load lies in the superheated section, the heater surface temperature increases notably. The evaporator exhibits high temperature uniformity. In the test heat load range, the maximum temperature difference on the heater surface is lower than 1.5℃. As the heat load increases, the thermal resistance of the evaporator decreases firstly and then increases.