微重力下航天器舱内混合对流传热高性能数值研究  

High-performance numerical study on mixed convection and heat transfer in spacecraft cabin under microgravity

作　　者：夏京京 张超[1] 王娴[1] XIA Jingjing;ZHANG Chao;WANG Xian(State Key Laboratory for Strength and Vibration of Mechanical Structures,School of Aerospace,Xi’an Jiaotong University,Xi’an 710049,China)

机构地区：[1]西安交通大学航天航空学院机械强度与振动国家重点实验室

出　　处：《热力发电》2019年第8期27-35,共9页Thermal Power Generation

基　　金：面向E级计算机的大型流体机械并行计算软件系统及示范(2016YFB0200901)~~

摘　　要：基于CPUs/GPUs架构,采用混合热格子-Boltzmann方法,对微重力环境下三维航天器舱简化模型内的混合对流问题进行了详细的非稳态数值模拟。结果表明:具有恒热流边界的元器件位于进风掠过的模型壁面中心时,热壁面平均努塞尔数^-Nu最大,换热最强;保持雷诺数Re不变而缩小模型尺寸到1:5及以下时,模型在全重力情况下与原型在无重力时的热壁面^-Nu相同,流场和温度场瞬态变化过程几乎一致,可用来指导在地面进行微重力下的实验研究;多GPUs结合格子Boltzmann方法计算的超高效率,可实现航天器电力系统和设备舱内流动换热的实时预测。On the basis of architecture of CPUs/GPUs and hybrid thermal lattice Boltzmann method,unsteady state numerical simulations on mixed convection and heat transfer in three-dimensional simplified model of the spacecraft cabin under microgravity are performed.The results show that,when the heating component with constant heat flow boundary is located in the center of the model wall which is swept by the inlet air,the average Nusselt number^-Nu of the hot wall reaches the largest and the heat transfer is the strongest.When the model scale is or below 1:5 and the Reynolds number Re is kept unchanged,the average Nusselt number^-Nu of the hot wall,and the transient evolution process of the flow and temperature field of the scaled model under gravity environment is the same as that of the prototype under microgravity environment,which can be used to guide the experimental study under microgravity on the ground.With ultra high efficiency,the multiple GPUs combined with LBM can realize real-time prediction of flow and heat transfer in electric system and equipment cabin of the spacecraft.

关 键 词：航天器舱 微重力 混合对流 混合热格子-Boltzmann法 GPUS 

分 类 号：TK124[动力工程及工程热物理—工程热物理]