地面结构热试验自然对流换热数值研究

Numerical Research on the natural convection heat transfer of thermal test under ground conditions

基于ANSYS CFX,发展了一种自然对流换热数值仿真计算方法。应用该方法对地面热试验中的自然对流换热进行了数值研1究。分别给出了大空间自然对流、平板型热试验真实工况下的换热热流密度大小,并将其与大空间自然对流工程经验公式计算结果、地面试验结果进行对比。结果表明,数值仿真结果具有一定的合理性和准确性,可作为地面热试验自然对流损失项补偿的依据,从而提高地面热试验的准确度和有效性。

In order to investigate the natural convection heat transfer in themal test under ground conditions, a numerial method was developed based on ANSYS CFX. With this method, the heat flux of hot wall in infinite space as well as in the real case of plat thermal test was received, which was proved to be correct after contrast with the result of engineering formula and test result. By applying the achievement, the validity and precision of thermal test under ground conditions can be increased.