Performance Analysis of the Effects of Microgrooved Surface on A Marine Current Turbine with Underwater Mooring Platform  

作　　者：DANG Zhi-gao MAO Zhao-yong SONG Bao-wei YANG Guang-yong 

机构地区：[1]School of New Energy,Nanjing University of Science and Technology,Jiangyin 214443,China [2]School of Marine Science and Technology,Northwestern Polytechnical University,Xi’an 710072,China [3]Key Laboratory for Unmanned Underwater Vehicle,Northwestern Polytechnical University,Xi’an 710072,China [4]Unmanned System Research Institute,Northwestern Polytechnical University,Xi’an 710072,China

出　　处：《China Ocean Engineering》2022年第5期755-766,共12页中国海洋工程（英文版）

基　　金：supported by the Scientific Research Start-up Fund of Nanjing University of Science and Technology(Grant No.AE89991/383);the National Natural Science Foundation of China(Grant Nos.51809214,10672136 and 61572404).

摘　　要：Marine current turbine(MCT),which is designed for the power supply of underwater mooring platform(UMP),is investigated in this article.To reduce its flow noise,the microgrooved surface is applied at the suction surface of the turbine blades.Comprehensive analyses of the effects of the UMP on MCT with microgrooved surface in different working conditions are presented.The transient turbulent flow field is obtained by incompressible large eddy simulation(LES),and then the Ffowcs Williams and Hawkings(FW-H)acoustic analogy is adopted to forecast the flow noise generated from the pressure fluctuations and loadings of the UMP shell and MCT blade surfaces.The numerical methods are first validated with experimental data and good agreements are obtained.Then,the influence of several key parameters on the performance of the MCT is then systematically studied,including interval distance,angle of pitch and angle of sideslip.For each case,the hydrodynamic parameters(thrust coefficient,torque coefficient and power coefficient),the vortical structures behind the model and the overall sound pressure level(OASPL)directionality are analyzed.Additionally,the noise reduction effect of the microgrooved surface is also presented.The present investigation could provide an overall understanding for the performance of MCT combined with UMP.

关 键 词：marine current turbine underwater mooring platform microgrooved surface large eddy simulation flow noise 

分 类 号：P754[天文地球—海洋科学] U674.38[交通运输工程—船舶及航道工程]