Visualization of the sound scattering by a cylinder
Visualization of the sound scattering by a cylinder出 版 物：《Chinese Journal of Acoustics》 (声学学报（英文版）)
年 卷 期：1993年第12卷第1期
页 面：9-18页
学科分类：07[理学] 082403[工学-水声工程] 08[工学] 070206[理学-声学] 0824[工学-船舶与海洋工程] 0702[理学-物理学]
基 金：The projet is supported by National Natural Science Foundation of China
主 题：Scattering Greeping waves Schlieren Method.
摘 要：The schlieren method is applied to visualizing the sound scattering of a cylinder immersed in the liquids. Images of the echoes, caused by normal and oblique incidence from a cylinder, are obtained for two kinds of liquids: (1) the liquid is composed of a transparent liquid; and (2) the liquid is composed of two non-mixable transparent liquids. It is found experimentally that the echo can be caused by the discontinaites in the shadow zone. This fact is utilized to demonstrate the locus of the helical surface wave creeping along the surface of the cylinder. For such cases the three-dimensional image can be described by this method and has not to use the system with special appliances and complex algorithm.
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