尖前缘平板的高超声速粘性干扰效应引起的压力分布规律研究

采用CFD方法计算了多种来流条件下高超声速平板绕流的粘性干扰现象,计算与实验结果吻合良好。针对理论分析在平板前缘失1效的情况,结合理论分析、CFD结果和试验结果对原有沿流向壁面压力分布关系式进行了修正,使得修正后关系式在整个平板上与相关数据吻合,显著增加了压力分布关系式的应用范围。同时根据CFD计算结果,分析了平板附面层内压力等流动参数的分布规律,发现附面层内法向压力分布存在峰值,壁面压力分布大于来流静压,并给出了峰值压力及其位置的拟合式。

Investigation of pressure distribution on sharp leading plates with the hypersonic viscous interaction

Viscous interaction phenomena in hypersonic flow are investigated by CFD on the flat plate,and the numerical results are in well agreement with the measured ones.A modified relation about induced pressure on wall is obtained and compared with experiment data and CFD results.This modified equation agrees well with all the related data we can obtain.Based on the CFD results,the distribution laws of pressure and other flow paramaters are analysed,and it is found that there is a peak value in pressure distribution and that the wall pressure is greater than the free flow pressure.Fit equations about the peak pressure and its position are also given based on the CFD results.