基于角系数跟踪反射能量研究太空中空心圆柱体温度分布

利用角系数跟踪反射能量求得辐射传递因子,探讨太空中太阳入射下、热控涂层对空心圆柱体温度分布的影响.使用有限差分法离散圆柱坐标系下三维稳态导热方程,考虑辐射-导热边界条件,用Patankar线性化方法将边界条件线性化,用点迭代法来求解名义上的线性化方程组从而得到空心圆柱体的温度分布.热控涂层表面的辐射特性用一组矩形谱带来近似.本文的研究方法对太空航天器件温度分布的精确数值求解具有参考价值.

Temperature Distribution Within a Hollow Cylinder in Outer Space: A Study with View Factors to Trace Reflected Energy

With view factors to trace reflected energy for radiative factors,effect of thermal control coating on temperature distribution in a hollow cylinder in outer space under solar incidence is studied.A finite difference method is used to discrete three-dimensional steady energy equation in circular cylindrical coordinates.Radiation-conduction boundary condition is used.Patankar linearization method is used to linearize boundary condition and iteration method is used to solve the nominal linearized equations.Temperature distribution within a hollow cylinder is obtained.Emitting properties of thermal control coatings are approximately expressed by a series of rectangular spectral bands.The methods can be extended to solve precisely temperature distribution within apparatus of spacecraft in outer space.