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后掠激波诱导分离特性的马赫数影响

MACH NUMBER EFFECTS ON SEPARATION BEHAVIORS INDUCED BY SWEPT SHOCK WAVE

  • 摘要: 利用壁面压力测量和表面油流显示技术对后掠压缩角产生的激波与湍流边界层干扰进行了实验研究。主要研究了来流马赫数对干扰分离特性和起始分离条件的影响,实验的马赫数为1.79,2.04和2.50,相应的雷诺数为2.42—2.47×10 ̄7/m.实验模型共15个,其后掠角变化范围是0°—60°,流向压缩角变化范围是10°—30°,实验结果表明,与二维干扰不同,对于大后掠角的三维干扰来说,分离线上的压比和起始分离时的无粘激波压比近似相等,且是一个与马赫数无关的常数。

     

    Abstract: An experimental investigation was made for the shock wave/turbulent boundary-layer interactions induced by swept compression corners.The techniques used in this studywere the surface pressure distribution measurement and surface oil-film streak visualization.Effects of upstream Mach number M_∞ on the behavior of separation and the condition forincipient separation were mainly studied. The test Mach numbers were 1.79,2.04 and 2.50and the Reynolds numbers were about 2.42 2.47×10 ̄7/m。 15 compression corner mo...

     

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