热负荷及环境温度对机械泵驱动两相热控系统性能影响  

Effects of Heat Load and Surrounding Temperature on the Performance of a Pump Driven Two-Phase Thermal Control System

作　　者：刘贤良 宋保银[1] 朱嫣[1] Liu Xianliang;Song Baoyin;Zhu Yan(College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016)

机构地区：[1]南京航空航天大学航空宇航学院,南京210016

出　　处：《制冷与空调（四川）》2017年第5期447-452,共6页Refrigeration and Air Conditioning

摘　　要：运用传热学、流体力学、两相流和控制论等知识对机械泵驱动两相热控系统的各个部件建立混合物模型及Simulink仿真模块。借助于Matlab/Simulink计算软件,对系统进行了动态仿真计算,得到了系统分别在热负荷和冷凝器侧环境温度变化情况下的温度分布和变化情况。据此对系统进行了运行稳定性分析。结果表明蒸发器侧热负荷的阶跃变化对蒸发器出口温度影响较大,对冷凝器进出口温度影响则较小;冷凝器侧环境温度周期性变化对冷凝器出口温度、储液器入口温度及泵入口温度影响较大,对蒸发器进出口温度影响则较小。The physical model was developed based on the governing equations in two-phase flow and the knowledge of heat transfer,fluid mechanics and cybernetics in the present work.The Simulink blocks were built from the equations for the accessories in the pump driven two-phase thermal control system.By means of the software Matlab/Simulink,the numerical simulation of the performance of the system was performed,and the temperatures in the inlet and outlet of the accessories and their variations with evaporator heating flux and the surrounding temperature of the condenser were gained.Therefore the stability of the system was analyzed.The results show that the sharp increase in heating flux will markedly influence the outlet temperature of the evaporator but not obvious to the condenser temperatures.The cyclical variation of the surrounding temperature will result in the marked change of the temperatures at the condenser outlet,the accumulator and the pump inlets but not the evaporator.

关 键 词：机械泵 两相流 热控系统 传热 动态性能 

分 类 号：V444.36[航空宇航科学与技术—飞行器设计]