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本文讨论了跨音速叶栅物面边界的数值处理方法,目的是寻求与我们所用内点格式相匹配的边界上流动参数的算法,以提高计算精度。本文首先推导了适合于物面边界计算的特征关系式,其次总结了五种边界处理方法,进行了数值试验。计算结果表明,配合我们的内点计算格式,以y向抛物外推的Denton修正法计算效果较好,能够较精确地反映跨音速叶栅带激波流场的物理特点。
In this paper, we discuss the numerical method of translaminar object surface boundary treatment. The purpose of this paper is to find the algorithm of the boundary flow parameters that match the interior point format we used to improve the calculation precision. In this paper, we firstly deduced the characteristic relation which is suitable for the calculation of the boundary of the object surface, and then summarized the five boundary treatment methods and carried out the numerical experiment. The calculation results show that the Denton correction method with parabolic extrapolation in y direction is better than the one calculated by our inner point calculation method and can accurately reflect the physical characteristics of transonic cascade with shock wave field.