摘要
为优化载人航天器热控系统的并联液体回路,减轻其质量,建立了并联回路传热和质量的数学物理模型;并以两支路系统为例,分析了其并联回路的轻量化设计问题,讨论了最优流量分配系数与流体流量、冷流体温度等参数之间的关系。研究发现,对并联回路而言,存在最佳管径与流量分配方案,使其质量最轻;随着流体总流量的增加,最优流量分配方案逐渐接近平均分配;给定流体总流量时,冷流体温度较低时最优的分配方式为平均分配,随着冷流体温度的提高,最优分配由支路散热任务、工作温度等因素决定。此外,还研究了支路管道长度和电源系统质量与泵功率之间的比例系数等因素对最优流量分配的影响。
This paper introduces a mathematical model which is set up to optimize the lightweight design of the parallel loops in the thermal control system of the manned spacecrafts. Take a two-branch parallel loop as an example, this paper analyzes the lightweight design of the parallel loop, investigates the relationship of the operational parameters, such as the optimized distribution ratio of the fluid, the flow rate of the fluid, and the temperature of the cold fluid. The results show that there is an optimized diameter of the pipes and an optimized distribution ratio of the fluid, which gives the loop a minimum weight. The results also show the optimized distribution ratio gradually gets to be the equal distribution with the increasing of the flow rate of the fluid. When the flow rate of the fluid is given, the optimized distribution ratio would be the equal distribution if the temperature of the cold fluid is low, while the optimized distribution ratio would not be the equal distribution but determined by the working temperature and the heat output of the branches if the temperature of the cold fluid gets bigger. Besides, some other parameters which could affect the optimized distribution ratio are also discussed in this paper, such as the length of the pipes and the proportionality coefficient between the weight of the electric power source and the pump power.
出处
《载人航天》
CSCD
2010年第3期37-43,共7页
Manned Spaceflight
关键词
载人航天器
热控系统
并联回路
轻量化设计
Manned Spacecraft
Thermal Control System
Parallel Loop
Lightweight Design
作者简介
程雪涛（1983．09－），男，博士研究生，主要从事航天器热管理方面的研究。
