近壁旋转圆柱流场特性数值模拟分析  

Numerical simulation analysis of flow around near-wall rotating cylinder

作　　者：王宗鹏 刘炳文 包燕旭 陈威[2] 唐国强[3] 李晓彬[2] WANG Zongpeng;LIU Bingwen;BAO Yanxu;CHEN Wei;TANG Guoqiang;LI Xiaobin(School of Science,Wuhan University of Technology,Wuhan 430063,China;School of Naval Architecture,Ocean and Energy Power Engineering,Wuhan University of Technology,Wuhan 430063,China;State Key Laboratory of Coastal and Offshore Engineering,Dalian University of Technology,Dalian 116024,China)

机构地区：[1]武汉理工大学理学院,湖北武汉430063 [2]武汉理工大学船海与能源动力工程学院,湖北武汉430063 [3]大连理工大学海岸和近海工程国家重点实验室,辽宁大连116024

出　　处：《中国舰船研究》2024年第2期21-30,共10页Chinese Journal of Ship Research

基　　金：国家自然科学基金资助项目(52201334);湖北省自然科学基金资助项目(2021CFB064);大连理工大学海岸和近海工程国家重点实验室开放基金资助项目(LP2203)。

摘　　要：[目的]为探讨近壁旋转圆柱尾流及流体力特性,对典型间隙比下旋转圆柱绕流进行研究。[方法]对雷诺数Re=200下3种典型间隙比(G/D=0.2,0.8,1.4)的旋转圆柱绕流展开数值模拟,对比不同间隙比和转速比下的圆柱尾流及流体力特性。[结果]结果显示:当G/D=0.2时,圆柱表面脱涡会受到显著抑制,圆柱表面升阻力无波动;当G/D=0.8和1.4且转速比较低时,会发生“尾流涡”脱落现象,其结构与2S模式相似,升阻力系数呈正弦周期性波动,振幅较小;当正旋转速较大时,圆柱表面无漩涡脱落,形成稳定的D模式尾流(随转速比增大由D+模式变为D-模式),“尾流涡层”与“壁面涡层”发生分离,“壁面涡”呈现多周期性脱落现象,升阻力系数呈多周期波动,振幅显著增大;当反旋转速较大时,圆柱表面被一层正涡量的涡层包裹,漩涡脱落受到显著抑制,升阻力无波动。[结论]所得结论可为高效流动控制技术发展提供参考。[Objectives]To investigate the near-wall rotating cylindrical wake and hydrodynamic character-istics,flow around cylinder at typical gap ratios is investigated.[Methods]A numerical simulation of flow around a near-wall rotating cylinder with different gap ratios(G/D=0.2,0.8,1.4)and rotation rates at Reyn-olds numberRe=200 was carried out to compare the cylindrical wake and hydrodynamic characteristics at dif-ferent gap ratios and rotation rates.[Results]The results show that:For G/D=0.2,the cylindrical vortex shedding is significantly suppressed and the lift and drag force on the cylindrical surface remain steady.For G/D=0.8 and G/D=1.4,at low rotation rates,the"wake vortex"is shed and is similar to the 2S pattern,with sinusoidal periodic fluctuations in the lift and drag coefficients and small amplitude;at higher positive rotation rates,the cylindrical wake pattern is the stable D pattern with no vortex shedding(changing from D*to D pattern as the rotation rate increases),the"wake vortex layer"is separated from the"wall vortex layer",the"wall vortex"is shed multi-periodically,the lift and drag coefficients are fluctuating multi-periodically and the amp-litude is increasing significantly;at higher reverse rotation rates,the cylindrical surface is wrapped by a posit-ive boundary layer,with no vortex shedding and no fluctuations in lift and drag.[Conclusions]The results can provide a reference for the development of high efficient flow control technology.

关 键 词：圆柱绕流 旋转 近壁圆柱 升阻力 涡层分离 

分 类 号：U661.1[交通运输工程—船舶及航道工程]