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a physical model for bypass transition

机译:旁路过渡的物理模型

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摘要

A new method of predicting boundary layer transition is presented which models the near wall velocity fluctuations induced in the laminar layer through pressure fluctuations associated with the freestream turbulence. These near wall velocity fluctuations are then assumed to develop into turbulent sport when their amplitude exceeds a threshold value. A relationship for the near wall velocity frequency spectra is also established, which indicates an increasing bias towards low frequencies as the skin friction co- efficient for the boundary layer decreases.
机译:提出了一种预测边界层过渡的新方法,该方法通过与自由流湍流相关的压力波动模拟层流层中引起的近壁速度波动。然后,当这些近壁速度波动的幅度超过阈值时,便会发展为湍流运动。还建立了近壁速度频谱的关系,这表明随着对边界层的皮肤摩擦系数的降低,对低频的偏见增加。

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