双储液器环路热管的设计与实验研究

设计了一套双储液器环路热管以解决其重力场中运行受方位限制的问题,介绍了通过储液器体积和工质充装量的匹配设计避免最难启动情形发生的方法,并进行了相关的实验研究。实验验证了双储液器环路热管重力场中运行不受方位限制的特性,并且发现,在可变热导区的一定的热载荷范围内,双储液器环路热管在不同姿态下稳态运行温度不相同,而其他热载荷区域内却基本一致。文章分别从储液器能量平衡和回流液体过冷量有效利用率的角度进行了分析和解释。

Development and Test Results of Dual Compensation Chamber Loop Heat Pipe

A dual compensation chamber loop heat pipe (DCCLHP) was developed to solve the problem of the relative orientation limit between the evaporator and the compensation chambers.The construction of the evaporator and the compensation chambers was presented. The concurrent design method of the working fluid charge mass and the compensation chambers volumes was introduced. Within a certain temperature range, the DCCLHP can not only start up and operate normally at any orientation, but also can avoid the most difficult startup situation. The operation and the thermal control characteristics of the DCCLHP were investigated. Test results indicate that in some heat load regions, the operating temperatures vary with the relative orientation between the evaporator and the compensation chambers. It was explained by the thermal equilibrium of the compensation chambers and the usage efficiency of the return liquid subcooling. The test results and discussion of the DCCLHP suggest that part of the return liquid subcooling that cools the liquid to be locally subcooled must be considered in the mathematical modeling of the LHP. Another suggestion is that an effective method to decrease the operating temperature or thermal resistance of the DCCLHP is to enhance the heat transfer between the return liquid and the fluid in the saturated compensation chambers is to increase the usage efficiency of the return liquid subcooling.