三维激波/湍流边界层干扰产生的起始分离的预测

Prediction for the Incipient Separation of Fin-Generated Three-Dimensional Shock Wave Turbulent Boundary Layer Interactions

本文对由平板上直立尖劈产生的激波/湍流边界层干扰引起的起始分离进行了研究,提出了一种预测起始分离条件的方法。边界层内的分析采用了Johnston的三角形模型,边界层外主流分析则利用了Prandtl-Meyer函数。预测方法的结果表明与文献中的实验数据符合良好,而且比McCabe理论和Korkegi准则及Lu的半经验关系有更好的物理基础。

The incipient separation induced by shock wave/turbulent boundary layer interactions at sharp fin was studied and a method for predicting the incipient separation was developed based on the compressible boundary layer theory. In the analysis Johnston's triangle model was employed in the boundary layer and the Prandtl-Meyer function was used in the external flow outside the boundary layer.A comparison between theory and experimental data in references is carried out and good agreement has been achieved. This analysis is better physically founded than those by McCabe and Korkegi as well as Lu.