The results of a parametric study of hydrodynamic stability in linear formulation of the Blasius boundary layer stability over two-layer compliant coatings are presented. In the calculations, experimental data for real silicon rubbers of several types on the elasticity modulus and the loss factor as functions of deformation frequency are used. Eight pairs of the coatings have been considered. The effect of coating layer thickness and external flow velocity on flow stability, in particular, on the behavior of the critical Reynolds number, has been studied parametrically. The regions of the critical Reynolds number of nonmonotonic nature, characteristic of most of coatings under consideration, have been found. A qualitative explanation of this effect is given. An analysis of the behavior of the critical Reynolds number allows determination of the optimal ratio of coating thicknesses for interaction with the flow.

中文翻译：

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两层顺应涂层上平板边界层水动力稳定性的参数研究

提出了在两层顺应性涂层上Blasius边界层稳定性的线性公式化中水动力稳定性的参数研究结果。在计算中，使用了几种真实硅橡胶的实验数据，这些数据是弹性模量和损耗因数与变形频率的函数关系。已经考虑了八对涂层。已通过参数研究了涂层厚度和外部流速对流动稳定性的影响，特别是对临界雷诺数的行为的影响。已经发现非单调性质的临界雷诺数区域，这是所考虑的大多数涂层的特征。对此效果进行了定性解释。