辐射[火积]耗散与空间辐射器温度场均匀化的关系

Relationship Between Entransy Dissipation of Thermal Radiation and Homogenization of Temperature Field for Thermal Radiator in Space

(火积)理论是针对传热优化发展起来的,并获得了越来越多的应用。本文基于辐射(?)原理,对空间辐射器散热过程中的散热量分布、发射率分布和散热面积分布问题进行了分析。对于以上三类优化分布问题,理论分析和数值计算均表明,辐射器最小的辐射(?)耗散和辐射热阻均对应于散热表面均匀的温度场。因此,辐射(?)原理可用于空间辐射器的温度场均匀化设计。

developed for heat transfer optimization and finds more and more applications In this paper, the distributions of the heat transfer rate, the emissivity and the heat transfer area are analyzed for the thermal radiator in space based on the entransy theory of thermal radiation. For the three distribution optimization problems, the theoretical analyses and the numerical simulations both show that the minimum radiative entransy dissipation and the minimum radiative thermal resistance of the thermal radiator both correspond to the uniform temperature field of the heat transfer surface. Therefore, the entransy theory of thermal radiation could be used to homogenize the temperature field of thermal radiator in space.