Investigations on Fluid Resonance Within A Narrow Gap Formed by Two Fixed Bodies with Varying Breadth Ratios  

作　　者：GONG Shu-kai GAO Jun-liang MAO Hong-fei 

机构地区：[1]School of Naval Architecture and Ocean Engineering,Jiangsu University of Science and Technology,Zhenjiang 212100,China [2]State Key Laboratory of Hydraulic Engineering Intelligent Construction and Operation,Tianjin University,Tianjin 300350,China [3]College of Ocean Engineering and Energy,Guangdong Ocean University,Zhanjiang 524000,China [4]Guangdong Provincial Key Laboratory of Intelligent Equipment for South China Sea Marine Ranching,Guangdong Ocean University,Zhanjiang 524088,China

出　　处：《China Ocean Engineering》2023年第6期962-974,共13页中国海洋工程（英文版）

基　　金：financially supported by the National Natural Science Foundation of China (Grant Nos.52371277 and 52001071);the State Key Laboratory of Hydraulic Engineering Intelligent Construction and Operation (Tianjin University) (Grant No.HESS-2323);the Postgraduate Research&Practice Innovation Program of Jiangsu Province (Grant No.KYCX23_3902);the Guangdong Basic and Applied Basic Research Foundation (Grant No.:2023A1515010890)。

摘　　要：The resonant motion of the fluid inside a narrow gap between two fixed boxes induced by incident regular waves with various wave heights is investigated by adopting a two-dimensional numerical wave flume based on an opensourced CFD package,OpenFOAM.The two boxes have identical draft and height,but the upstream box has a variable breadth.This article focuses on the influences of the breadth ratio,defined as the ratio of the breadth of the upstream box to that of the downstream box,on the following three aspects of hydrodynamic characteristics of gap resonance:(1)the wave height amplifications inside the gap,and in front and at the rear of the structure system,(2)the reflection,transmission,and energy loss coefficients of the structure system,and(3)the response and damping time of the fluid resonance.It is found that the fluid resonant frequency,the amplification factor of the resonant wave height inside the gap and the maximum energy loss coefficient of the structure system are shown to gradually decrease with the increase of the breadth ratio.The response time of gap resonance is shown to first increase and then decrease with the breadth ratio overall,regardless of the incident wave height,and the configuration that the two boxes have the same breadth would bring the largest response time of gap resonance.

关 键 词：gap resonance wave amplification varying breadth ratios OPENFOAM 

分 类 号：P75[天文地球—海洋科学]