Hydrodynamic Characteristics of the Biplane-Type Otter Board with the Canvas Through Flume−Tank Experiment

作     者：XIE Si-jie WU Ru-ke HU Fu-xiang SONG Wei-hua XIE Si-jie;WU Ru-ke;HU Fu-xiang;SONG Wei-hua

作者机构：Department of Marine FisheriesZhejiang Ocean UniversityZhoushan 316022China Key Laboratory of Marine Fishery Equipment and Technology of ZhejiangZhoushan 316022China Tokyo University of Marine Science and TechnologyMinatoTokyo 108-8477Japan 

出 版 物：《China Ocean Engineering》 (中国海洋工程（英文版）)

年 卷 期：2022年第36卷第6期

页      面：911-921页

核心收录：

学科分类：08[工学] 0815[工学-水利工程] 0824[工学-船舶与海洋工程] 0802[工学-机械工程] 0814[工学-土木工程] 082401[工学-船舶与海洋结构物设计制造] 

基　　金：supported by the Zhejiang Provincial Key Research and Development Program of China(Grant No.2018C02040). 

主　　题：frame-type flexible structure hydrodynamic characteristics proportion of flexible area flume−tank experiment 

摘      要：Hydrodynamic characteristics of a biplane-type otter board,equipped with nylon canvas of 2 mm in thickness was investigated through flume-tank experiment in this study.A series of predesigned structures with different gap-chord ratios G/c(0.75,0.90,1.05),stagger anglesθ(30°,45°,60°),and proportions of flexible area relative to the whole wing areaƒr(0,55%,65%,75%),at an aspect ratio of 2.0 and a camber ratio of 15%,were experimentally carried out.The results showed the solution referring to the usage of flexible canvas replacing part of rigid structure for the biplane-type otter board was efficient for the trawling in the middle or shallow water area.The improvement of lift and stability for the biplane-type otter board was concluded,and drag of the structure was reduced by 1.9%atƒr=55%.In addition,the coefficient of variation of the lift and drag coefficient at different current velocities were 2.69%and 2.28%,respectively,which was smaller than those at relatively large proportion of the flexible area.Compared with the other tested structures,the frame-type flexible structure with the gap-chord ratio of 0.9 and a stagger angle of 45°and the proportion of the flexible area of 55%,performed best,and its drag was reduced by 5.72%and lift increased by 4.8%,compared with the rigid biplane-type otter board at the angles of attack from 18°to 28°.