中文摘要：

针对气动热数值模拟中壁面热流后处理方法进行了系统的数值研究,提出了一种有别于常规微分法和积分法的壁面热流后处理方法.通过3种算例进行了对比分析,结果表明：即使在流场参数相同情况下,采用不同的壁面热流后处理方法计算的热流结果也会有较大差异,且表现出不同的网格依赖性.微分法对网格的依赖性较大,单纯提高差分精度不一定能够减弱网格依赖性和提高计算精度,还与近壁处网格分布密切相关;积分法从能量平衡积分方程出发,极大地减弱了网格依赖性,具有较高的计算精度.所提出方法具有与积分法相当的网格依赖性和计算精度,尤其在驻点区域,其网格依赖性更弱于积分法,且计算简单,提高了计算效率.

英文摘要：

A systematic study of post-processing methods for wall heat-flux in aeroheating numerical simulation was conducted and a post-processing method differing from conventional differential or integral methods was proposed.The comparisons among different postprocessing methods were done by three cases.The results indicate that,even if the flow parameters remain the same,significant differences and grid-dependence in wall heat-flux prediction are observed using different post-processing methods.The differential method depends strongly on the grid used in calculations.Enhancement of the order of finite difference cannot always weaken its grid-dependence and improve its accuracy in wall heat-flux prediction,which is also related closely to the grid distribution near the wall.The integral method derived directly from the integral energy balance equation can significantly achieve a lower grid-dependence and thus a high accuracy.The proposed method can be compared with the integral method in the aspect of grid-dependence and accuracy.Especially,in the stagnation region,it has even weaker gird-dependence.Moreover,it is simpler and easier to be implemented numerically,thus further improving the computation efficiency.