Experimental Study on Crescent Waves Diffracted by A Circular Cylinder  

作　　者：YAN Kai SHEN Liang-duo SHANG Jin-wei MA Liang ZOU Zhi-li 

机构地区：[1]School of Port and Transportation Engineering,Zhejiang Ocean University,Zhoushan 316022,China [2]State Key Laboratory of Coastal and Offshore Engineering,Dalian University of Technology,Dalian 116024,China

出　　处：《China Ocean Engineering》2018年第5期624-632,共9页中国海洋工程（英文版）

基　　金：financially supported by the National Natural Science Fundation of China(Grant No.51879237);the Research Start Fund of Zhejiang Ocean University(Grant No.11185010817)

摘　　要：Crescent waves often observed on the sea surface are unusual wave pattern induced by the instability of Stokes wave.The paper presents the experimental results of the wave field around a circular cylinder generated by the diffraction of crescent wave in order to examine the difference of diffracted crescent waves from the commonly-used diffracted Stokes waves. The results show that with the existence of the cylinder, the crescent wave pattern can still get fully developed, and with the presence of this type of wave pattern, the symmetry breaking of the wave amplitude distribution occurs and there are extra wave components at the frequencies of 0.5 ω;, 1.5ω;and 2.5ω;（ω;is the frequency of Stokes waves） appearing in the wave amplitude spectrum.Crescent waves often observed on the sea surface are unusual wave pattern induced by the instability of Stokes wave.The paper presents the experimental results of the wave field around a circular cylinder generated by the diffraction of crescent wave in order to examine the difference of diffracted crescent waves from the commonly-used diffracted Stokes waves. The results show that with the existence of the cylinder, the crescent wave pattern can still get fully developed, and with the presence of this type of wave pattern, the symmetry breaking of the wave amplitude distribution occurs and there are extra wave components at the frequencies of 0.5 ω_0, 1.5ω_0 and 2.5ω_0(ω_0 is the frequency of Stokes waves) appearing in the wave amplitude spectrum.

关 键 词：Stokes wave amplitude spectrum CYLINDER symmetry breaking 

分 类 号：P7[天文地球—海洋科学]