微重力场中对流-辐射耦合换热系统的地面模拟

Thermal scale modeling of radiation convection system in micro gravity environment

为在地面模拟太空舱内的流动与换热，通过理论分析和数值模拟，发展了微重力条件下对流－壁面辐射耦合传热稳态系统的地面相似模拟技术，进一步完善了温度－材料综合保持的自然对流抑制技术。通过采取补偿热流，调整壁面热流密度分布的方法，使尺寸缩小后的模型的Ｎｕ数、材料和温度与原型保持一致，从而实现模型与原型流动和换热相似。针对均匀通风方式，用数值方法对相似性进行了验证。

In order to simulate the fluid flow and heat transfer in a spacestation cabin,both theoretical and numerical analyses are carried out,and the temperature material Nusselt number preservation technique is further developed and extended to ground thermal scale modeling of radiation convection systems under micro gravity by the technique of wall heat flux compensation and modification . When the model is properly reduced,the natural convection can be dramatically suppressed,the similarity between the model and prototype in temperature and flow field is obtained with this preservation technique. As an example use of this preservation technique in uniform ventilation , verfication is made through numerical method,and the ratio of the expected model is obtained.