论文部分内容阅读
对双储液器环路热管运行中出现的温度迟滞、倒流及温度波动等不稳定现象进行了描述和解释.实验发现,在热载荷递增和递减循环实验中,双储液器环路热管在可变热导区内的工作温度并不一致,功率递减时的工作温度偏低;姿态对出现温度迟滞现象的热载荷范围有一定影响;热载荷变化幅度对温度迟滞的影响并不大.倒流现象不仅发生在蒸气槽道充满液体的小热载荷启动过程,蒸气槽道存在蒸气的小热载荷启动过程中也可能发生工质倒流;工质倒流的原因主要是芯内蒸发或者蒸气瞬间穿透毛细芯,使得芯内压力高于芯外压力.温度波动现象可能发生在小热载荷启动或者较大热载荷的亚稳态运行过程中,尤其当有液体引管穿过的储液器位于蒸发器上方时,温度波动发生的几率较大.
The phenomena of instability such as temperature hysteresis, backflow and temperature fluctuation appearing in the operation of the double receiver loop heat pipe were described and explained.It was found that in the increasing cycle of heat load and decreasing cycle, The working temperature in the variable heat conduction zone is not consistent, and the working temperature is low when the power is decreasing. The attitude has a certain influence on the thermal load range in which the temperature hysteresis occurs. The change range of the thermal load has little effect on the temperature hysteresis. Not only occurs in the steam channel is filled with liquid small heat load start-up process, vapor channel steam vapor in the small heat load may also occur during start-up backflow of material; work-substance backflow is mainly due to core evaporation or vapor instantly penetrate the capillary Core such that the pressure inside the core is higher than the pressure outside the core Temperature fluctuations can occur during small heat load starts or during metastable operation with large heat loads especially when the liquid reservoir through which the liquid lead passes is located in the evaporator Above, the temperature fluctuations occur more likely.