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原文传递 NUMERICAL SIMULATIONS OF COMPLIANT MATERIAL RESPONSE TO TURBULENT FlOW

题名：	NUMERICAL SIMULATIONS OF COMPLIANT MATERIAL RESPONSE TO TURBULENT FlOW
作者：	Alfred C. Buckingham Mary S. Hall Ramsey C. Chun
关键词：	simulation；material；erica；flow；resp；comp；monte-carlo；navier-stokes；coating；structured
摘要：	Homogeneous aivl internally structured material coatings are studied numerically as candidates for drag and turbulence generated noise reduction on submersible hulls. Dynamic motions of coraplianl surfaces may conceptually interrupt random turbulent motions, reducing the turbulent interface stresses and absorbing turbulent energy, andconsequently reducing the tuibuleiKe at the flow/coating interface. Timi dependent, two and three dimensional Monte-Carlo turbulent pressure Held models, and interactive Navier-Stokes pseudo-spectral metlKxls are used to represent the ’nsteady flow, while finite element methods are applied to represent a variety of homogeneous, layered, and internally struettired material coatings. The influence of added mass and in-depth overburden on the material response in ocean water is disaissed. Promising compliant material coatings include sandwiches of soft, homogeneous layers between thin, stiffer elastic materials and internally structured coatings combining streamwise ribs, and spanwise voids separated by stiff elastic supporters imbedded in soft yielding viscoelastic layers.
报告类型：	科技报告