Experimental study on dynamic behavior of mechanically pumped two-phase loop with a novel accumulator in simulated space environment  

作　　者：Qingliang MENG Tao ZHANG Feng YU Yu ZHAO Zhenming ZHAO Zhenhua ZHOU 

机构地区：[1]Beijing Institute of Space Mechanics and Electricity,Beijing 100094,China [2]Beijing Key Laboratory of Advanced Optical Remote Sensing Technology,Beijing 100094,China [3]College of Energy and Mechanical Engineering,Shanghai University of Electric Power,Shanghai 200090,China

出　　处：《Chinese Journal of Aeronautics》2022年第12期102-116,共15页中国航空学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.51806010);Shanghai Sailing Program,China(No.18YF1409100).

摘　　要：Mechanically pumped two-phase loop(MPTL)which is a prominent two-phase heat transfer technology presents a promising prospect in thermal control for space payload.However,transient behavior of MPTL caused by phase-change and heat sources load-on/off in simulated space environment is rarely reported.In the present study,one MPTL setup was designed and constructed,and experimentally studied.Particularly,a novel two-phase thermally-controlled accumulator integrated with passive cooling measure and three capillary structures was designed as the temperature-control device.Dynamic behavior of the start-up,temperature control,and temperature adjustment were monitored;meanwhile,thermodynamic behavior within the proposed accumulator,the operating behavior as well as the heat and mass transfer behavior between the main loop and the accumulator were revealed.The results show that the fluid management function of the capillary structures for the novel accumulator is verified.The working point of the MPTL system can be adjusted by changing the temperature control point of the accumulator and it is little influenced by external heat flux and heat sources on/off.Pressure-drop oscillations which are manifested as fluctuations of temperature and pressure can be observed after phase changing due to the compressible volume within the accumulator and the negative-slope portion of the internal pressure.

关 键 词：Heat and mass transfer Mechanically pumped twophase loop(MPTL) Pressure drop fluctuation Thermal control Two-phase flow 

分 类 号：TK124[动力工程及工程热物理—工程热物理] V444.36[动力工程及工程热物理—热能工程]