考虑底壁面效应影响的三维扑翼推进特性研究  

Propulsive Performance of a 3D Flapping Foil with Ground Wall Effect

作　　者：李永成[1] 潘子英[1] LI Yong-cheng;PAN Zi-ying(State Key Laboratory of Hydrodynamics,China Ship Scientific Research Center,Wuxi 214082,China)

机构地区：[1]中国船舶科学研究中心水动力学重点实验室,江苏无锡214082

出　　处：《船舶力学》2021年第10期1331-1340,共10页Journal of Ship Mechanics

基　　金：国防水动力学重点实验室基金资助项目(350124116)。

摘　　要：本文采用重叠网格技术对考虑底壁面效应影响下的三维拍动翼的推进特性进行了数值模拟研究,计算时选取的特征雷诺数为1.0×10^(4)。数值模拟结果表明:底壁面的存在对拍动翼的水动力特性以及周围的流场结构都产生了很大影响;与无界流场相比,当拍动翼运动至底壁面附近时,将会产生明显的推力增大(高斯特哈尔数)现象,并且伴随着升力急剧增大;此外,由于拍动翼与壁面之间的相互作用,拍动翼周围的涡环变成了半月牙形。本文研究成果可为今后仿生扑翼的样机研制提供技术依据和参考。The ground wall effect on the propulsive performance of a flapping foil was numerically in-vestigated by using overlapping grid method at a moderate high Reynolds number of 1.0×10^(4).The nu-merical results show that both the fluid dynamics and flow structures of the flapping foil are tremen-dously affected by the ground wall.When the hydrofoil is arranged close to the ground wall,a distinct thrust enhancement(at high St number)and a lift reinforcement can be acquired,compared with the case without ground wall.Moreover,a crescent vortex loop was observed as the result of mutual inter-action between the flapping foil and the ground wall.

关 键 词：拍动翼 底壁面效应 重叠网格技术 推进特性 涡环结构 

分 类 号：U661.3[交通运输工程—船舶及航道工程]