航天器内外耦合回路热网模型的轻量化分析

Mass Optimization of Thermal Network Model of Coupled Dual-loop Thermal Control System in Spacecraft.

目的解决载人航天器热控和环控生保系统的轻量化问题。方法研究了由内外耦合液体回路和气体回路所构成的流动和换热网络。建立了流动、传热的物理和数学模型 ,计算了网络系统中组件及结点的热力学参数 ,在此基础上由所建立的质量计算模型 ,得到系统质量。分析了一些操作参数和结构参数对系统质量的影响 ,如管径、流量等。结果结果表明 ,在一定的设计要求下 ,系统存在最佳管径 ;内回路流量存在上限 ,而外回路流量存在下限 ;且内外耦合回路中流量及辐射散热器出口温度等参数都存在最佳值。

Objective To deal with the mass optimization of thermal contro l system as well as environmental control and life support system(ECLSS) of manned spacecraft. Method The thermo-hydraulic network composed of coupled liquid du al-loop and gas loops was studied. Physical and mathematical models were establ ished and used for flow, heat transfer and mass calculation in the network. The influences of various operational and structural parameters on the mass were ana lyzed. Result There were optimal pipe diameters for internal loop an d external loop; there existed an upper limit of flow rate in the internal loop and lower limit in the external loop; there were also optimal flow rates in the loops and optimal exit temperature of the radiator. Conclusio n Reas onable design of these parameters were very important for reducing the system ma ss.