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On the Effects of a Flexible Structure on Boundary Layer Stability and Transition

机译:柔性结构对边界层稳定性和过渡的影响

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Delaying the onset of boundary layer transition has become a major research area in the last few years. This delay can be achieved by either active or passive control techniques. In the present paper, the effects of flexible or compliant structures on boundary layer stability and transition is studied. The Orr-Sommerfeld equation coupled to a beam equation representing the flexible structure is solved for a Blasius type boundary layer. A parametric study consisting of the beam thickness and material properties is carried out. In addition, the effect of fluid wall shear stress on boundary layer stability is analyzed. It is found that high density and high Young modulus materials behave like rigid structures and therefore do not alter the stability characteristic of the boundary layer. Whereas low density and low Young modulus materials are found to stabilize the boundary layer. High values of fluid wall shear stress are found to destabilize the boundary layer. Our results are in good agreement with those published in the literature.
机译:在过去的几年中,延迟边界层过渡的开始已经成为一个主要的研究领域。该延迟可以通过主动或被动控制技术来实现。在本文中,研究了柔性或柔性结构对边界层稳定性和过渡的影响。对于Blasius型边界层,求解了与表示柔性结构的梁方程耦合的Orr-Sommerfeld方程。进行了由光束厚度和材料特性组成的参数研究。此外,分析了流体壁剪应力对边界层稳定性的影响。发现高密度和高杨氏模量材料的行为类似于刚性结构,因此不会改变边界层的稳定性。而发现低密度和低杨氏模量的材料可以稳定边界层。发现高的流体壁切应力值使边界层不稳定。我们的结果与文献中发表的结果非常吻合。

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