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首页> 外文期刊>Journal of aerospace engineering >Computation of Three-Dimensional Nonlinear Panel Flutter
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Computation of Three-Dimensional Nonlinear Panel Flutter

机译：三维非线性面板颤振的计算

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A recently developed three-dimensional viscous aeroelastic solver is applied to the solution of nonlinear panel flutter. The solution scheme implicitly couples a well validated Navier-Stokes code with a finite-difference procedure for the Von Karman plate equations by employing a subiteration strategy. Both low supersonic, M_∞= 1.2, and subsonic, M_∞= 0.95, cases are computed. For the supersonic case, the presence of either a laminar or turbulent boundary layer delays the onset of flutter, with higher flutter dynamic pressures resulting for thicker boundary layers. This effect is much less pronounced when the boundary layers are turbulent. In the subsonic case multiple solutions are obtained. The downwardly divergent solution displays a very complex interaction between the laminar boundary layer and the flexible panel that results in significant acoustic radiation from the vibrating panel.
机译：最近开发的三维粘性气动弹性求解器应用于非线性面板颤振的求解。该解决方案通过采用子迭代策略，将经过良好验证的Navier-Stokes代码与Von Karman板方程的有限差分程序隐式耦合。计算低超音速M_∞= 1.2和亚音速M_∞= 0.95的情况。对于超音速情况，层流或湍流边界层的存在会延迟颤动的发生，而更高的颤动动压力会导致边界层更厚。当边界层是湍流时，这种影响就不那么明显了。在亚音速情况下，可以获得多个解。向下发散的解决方案在层状边界层和柔性面板之间显示出非常复杂的相互作用，这导致了来自振动面板的大量声辐射。

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