Deformations of a compliant coating in a turbulent flow, measured previously and calculated in this work, are compared. The calculated spectral density of coating deformations at low frequencies (25–250 Hz) turned out to be almost two orders of magnitude higher than the measured one, and the rms value of the measured deformation was seven times lower than the calculated one. The transitional regime for stabilizing the forced coating oscillations under the action of a pressure wave is calculated. It is shown that the coating almost always works in the transition regime, without reaching the maximum deformation amplitudes that are characteristic of the steady state. It is concluded that it is necessary to use more complex boundary conditions that take into account the non-stationary character of the process because the amplitude of coating deformation varies in a complex way during the lifetime of organized structures moving in a turbulent boundary layer.

中文翻译：

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关于在湍流边界层中压力脉动引起的顺应涂层变形的特征

比较了先前测量并在这项工作中计算出的湍流中顺应性涂层的变形。在低频（25-250 Hz）下，计算得出的涂层变形的频谱密度比测量值高出近两个数量级，测量值的均方根值比计算值低七倍。计算了在压力波作用下稳定涂层强迫振荡的过渡状态。结果表明，涂​​层几乎总是在过渡状态下起作用，而没有达到稳态所具有的最大变形幅度。