双储液器环路热管稳态运行特性的实验研究

Experimental Investigation on Steady-state Operating Characteristics of a Dual Compensation Chamber Loop Heat Pipe

双储液器环路热管的独特设计可以解决常规单储液器环路热管地面重力场中运行姿态受限的问题,拓展常规环路热管的应用领域。对双储液器环路热管在3种特定姿态下的稳态运行特性进行了实验研究,验证了双储液器环路热管即使在最为苛刻的姿态下仍可正常运行的能力。通过对实验结果的分析可得:双储液器环路热管在重力辅助姿态下的工作温度偏低是由系统外回路压降变化引起的;可变热导区内工作温度随热载荷的变化是由控温储液器的能量平衡所决定。此外,实验发现双储液器环路热管在热载荷递增和递减过程会出现温度迟滞现象。

A dual compensation chamber loop heat pipe is developed to solve the problem of relative orientation limit of the conventional loop heat pipes operating in ground environment and extend the application domain of conventional loop heat pipes.The steady-state operating characteristics at three typical orientations are investigated,and the operating ability of the dual compensation chamber loop heat pipe at the most severe orientation is demonstrated by experiments.Analysis of the experimental results shows that the operating temperature is lower at gravity-assisted orientation than other orientations and this phenomenon is caused by the pressure drop change of the external loop.The operating temperature variation with different heat load is determined by the energy conservation of the compensation chambers.In addition,the temperature hysteresis phenomena are found in the heat load step increase and decrease process in the experiments.