加速度作用下环路热管工作特性实验

Experimental investigation on operational performance of loop heat pipe subjected to acceleration force

针对单储液器环路热管在过载加速度作用下可能出现的温度波动甚至无法运行的问题,基于恒加速度离心机系统,建立了双储液器环路热管(DCCLHP)工作特性实验台,实验研究了双储液器环路热管在重力场稳定运行后再施加过载加速度时的工作特性,分析了不同加热功率、不同加速度大小和方向对其运行性能的影响.结果表明,双储液器环路热管在加速度为7g时仍可达到稳定工作状态,加速度作用导致其稳定运行温度低于地面重力场的温度,且随加热功率和加速度不同,运行温度降低程度不同;加速度方向沿储液器2指向储液器1时其达到稳定状态所需时间比其反方向时更短.实验还观察到了加速度作用下冷凝器出口和液体管线出口温度波动现象.

To solve the problem of temperature oscillation,even operation failure when loop heat pipe with single compensation chamber was subjected to acceleration force,the experimental setup was built for testing the performance of dual compensation champers loop heat pipe（ DCCLHP） based on the centrifugal machine system with constant acceleration. The operational characteristics of DCCLHP were researched when it was subjected to acceleration force after reaching the steady state at gravity field. The influence of different heat load,acceleration value and direction on the performance was analyzed. The results show that the operation of DCCLHP can get to the steady state at 7g acceleration field. The steady operation temperature at elevated acceleration field is lower than that at gravity field and the heat load and acceleration force have an impact on the decrease. It takes less time along the acceleration direction from compensation chamber 2 to compensation chamber 1 than in the opposite direction when it gets to the steady operation. Moreover,the temperature oscillations at the outlet condenser and liquid line occur as a result of the acceleration effect.