大型波流水槽整流区间长度的优化研究.pdf

Investigation of the Optimal Interaction Zone Length fora Large Wave-current FlumeYAO Hai-yuan1,2,ZANG Zhi-peng1,3,FANG Zhuo2,TIAN Ying-hui4,CHENG Ning5(1.State Key Laboratory of Hydraulic Engineering Simulation and Safety,Tianjin University,Tianjin 300072,China;2.Transport Planning and Research Institute,Ministry of Transport,Beijing 100028,China;3.Key Laboratory ofEarthquake Engineering Simulation and Seismic Resilience of China Earthquake Administration,Tianjin University,Tianjin 300350,China;4.Melbourne School of Engineering,The University of Melbourne,Victoria 3010,Australia;5.China Harbour Engineering Company Limited,Beijing 100027,China)Abstract:In this study,a numerical wave-current flume is established based on OpenFOAM softwareaccording to the real configuration of a physical flume.The current inlet is set in front of the wave paddle,which results in the formation of an interaction zone downstream of the current inlet.The aim ofthis study is to investigate the effects of the main influential parameters on the length of the interactionzone.Thus,the optimal configuration of wave-current flumes can be determined to obtain the minimum length of the interaction zone,thereby maximizing the effective test section.The vertical profilesof the time-mean averaged horizontal velocity at different locations are calculated.The length of theinteraction zone is determined according to deviations of the time-mean velocity from the stable valueof less than 10%.Based on the numerical results,the optimal values of the incident angle,locationand width of the current inlet are determined.The effects of water depth,wave period,wave height,and current inlet velocity on the length of the interaction zone are also investigated.Key words:numerical wave-current flume;interaction zone;configuration parameter;optimal designCLC number:TV139.2Document code:Adoi:10.3969/j.issn.1007-7294.2023.06.0050 IntroductionPhysical modeling is one of the most commonly-used methods to study hydrodynamic issues incoastal and offshore engineering1.A large-scale earthquake engineering simulation facility hasbeen installed in Tianjin.In the facility,a large shaking table set up in a wave-current flume isused to simulate the responses of coastal structures under the combined effects of earthquakes andmarine environmental loads.In a physical flume,there is usually an interaction zone when the current goes into the flume and then interferes with waves.After the interaction zone,the wave-current第27卷第6期船舶力学Vol.27 No.62023年6月Journal of Ship MechanicsJun.2023Article ID：1007-7294（2023）06-0835-13Received date:2022-12-15Foundation item:Supported by the China National Key R&D Program(2021YFB2600700);the National NaturalScience Foundation of China(51979192;51579232)and the Program of China CommunicationsConstruction Company Limited(2018-ZJKJ-01)Biography:YAO Hai-yuan(1988-),male,Ph.D.candidate;ZANG Zhi-peng(1981-),male,associate professor,corresponding auhtor,E-mail:;FANG Zhuo(1982-),female,senior engineer;TIAN Ying-hui(1974-),male,professor;CHENG Ning(1986-),male,senior engineer.field tends to be stable,i.e.,the effective test section.Thus,it is necessary to investigate the interaction process between waves and currents in the physical flume to obtain the minimum length of theinteraction zone to maximize the effective test section.For this reason,the configuration of thewave-current flume should be optimized,and the influences of the main parameters on the length ofthe interaction zone should be investigated to meet the desired functions.At present,there are many studies on numerical wave flumes.Xiao et al(2009)2established anumerical wave trough using a meshless method to simulate the propagation process of two-dimensional nonlinear irregular waves from deep to shallow waters.Zhao et al(2010)3developed a numerical flume test based on the nonperiodic high-order spectral method by using an additional potential technique and predicted the generation and propagation of nonlinear waves with different Ursellnumbers.Ning et al(2010)4proposed a completely nonlinear numerical flume model to simulatewave-flow mixing by using the time-domain higher-order boundary element method and used themixed Euler-Lagrangian method to track the instantaneous fluid surface.Higuera et al(2013)5established a numerical wave flume based on OpenFOAM and detailed validation of the new boundary conditions against laboratory experimental data,covering an ample range of different coastal engineering processes.Schmitt and Elsaesser(2015)6summarized and reviewed four different wavegenerator methods and discussed their limitations,requirements for grid and preprocessing,andcomplexities.Jiang et al(2017)7studied fluid resonance in a moonpool formed by two identicalrectangular hulls during in-phase heaving motion by employing a two-dimensional numerical waveflume based on the OpenFOAM package.Gholamipoor and Ghiasi(2020)8proposed a Hermite-type radial point interpolation method,which was used t