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首页> 美国政府科技报告 >Acoustic Coupling Phenomena between Hydrodynamic Pressure Fluctuations inBoundary Layers and Elastic Layered Media
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Acoustic Coupling Phenomena between Hydrodynamic Pressure Fluctuations inBoundary Layers and Elastic Layered Media

机译：边界层与弹性分层介质中水动力压力波动的声耦合现象

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摘要

The following goals have been accomplished in the course of this research: (1) Wehave developed an analytic Green's function method for pseudo-spectral numerical simulations of boundary layer and channel flows; (2) The numerical code was used to simulate burst-like events in a laminar boundary layer; (3) We have developed four models of a wall-pressure associated with a turbulent burst; (4) A theoretical investigation was conducted of the process of sound generation. The far field acoustic pressure in the fluid and in the coating due to the inhomeogeneity has been calculated; (5) Diffraction of elastic waves by multiple dipping layers of arbitrary shape for two and three dimensional models in the absence of fluid for incident plane P, SV, SH and Rayleigh waves was investigated; and (6) Diffraction of elastic waves in a multilayered plate with an inclusion of arbitrary shape submerged in fluid is the second class of problems which have been completed.

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