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根据有旋特征线理论,设计出了沿程马赫数下降规律可控的轴对称基准流场,分析了基准流场的几何参数(前缘压缩角及中心体半径)的影响规律,发现选取较小的前缘压缩角和中心体半径有利于得到性能优良的基准流场;然后在设计状态Ma=6时研究了三种典型的马赫数下降规律对这种轴对称流场性能的影响。最后考虑了粘性的影响,并进行了粘性修正探索,结果表明,采用附面层位移厚度修正方法后,基准流场的壁面压力分布和无粘情况吻合良好。
According to the spin characteristic line theory, the axial symmetry flow field which can be controlled by the decreasing Mach number is designed. The influence law of geometric parameters (leading edge compression angle and center radius) of the reference flow field is analyzed. The small leading edge compression angle and the center body radius are favorable for obtaining the good reference flow field. Then, the influence of three typical Mach numbers on the axial symmetry flow field is studied in the design state of Ma = 6. Finally, the effect of viscosity is considered, and the viscous correction is explored. The results show that the wall pressure distribution in the reference flow field is in good agreement with the non-stick condition after the thickness correction method of the interface layer displacement is adopted.