微重力条件下管肋式空间辐射器的传热分析

建立了航天器上常用的管肋式空间辐射器在微重力条件下的导热、对流和辐射相互耦合的复杂传热过程的数学模型，并考虑了管壁与肋片表面之间相互辐射的影响。整个模型的求解采用迭代法，管内流体的速度场和温度场的求解用ＳＩＭＰＬＥ算法，分别计算了肋片上的温度分布、管壁与肋片上的热流分布与管内对流换热的平均Ｎｕ数，得出了进行管肋式空间辐射器优化设计所必需的重要参数，同时还研究了重力场对辐射器传热的影响，对在地面上进行空间辐射器的模拟实验研究具有重要意义。

Investigations on heat transfer in a fin tube radiator under micro gravity

A model for depicting the complicated heat transfer processes coupled with heat conduction, heat convection and radiation in a fin tube radiator of aerospace cabin is established. Radiation between tube wall and fin surface are considered. Iterative method is applied to the whole model solution, and SIMPLE method is used to solve the field of temperature and velocity inside the tube. The distribution of temperature in the fin, heat flux in tube wall and fin, and the mean Nusselt number in the tube are calculated respectively, and significant parameters necessary for optimally designing the fin tube radiator are thus obtained. Influences of gravity on the radiator heat transfer are also investigated. The paper has important guidance for conducting the ground simulating experiments on the radiator.