计算物理 ›› 2013, Vol. 30 ›› Issue (2): 159-168.

• 论文 •    下一篇

串列对转双圆柱的多块LB模拟

陶实, 周力, 宗智   

  1. 大连理工大学 船舶工程学院, 大连 116024
  • 收稿日期:2012-05-23 修回日期:2012-10-21 出版日期:2013-03-25 发布日期:2013-03-25
  • 作者简介:陶实(1989-),男,湖北黄冈,硕士生,主要从事流体力学(流固耦合)研究,E-mail:whuttaoshil013@163.com
  • 基金资助:
    国家自然科学基金(50921001);国家重点基础研究发展计划(2010CB832700)资助项目

Multi-Block Lattice Boltzmann Method for Flows Around two Tandem Rotating Circular Cylinders

TAO Shi, ZHOU Li, ZONG Zhi   

  1. School of Naval Structure, Dalian University of Technology, Dalian 116024, China
  • Received:2012-05-23 Revised:2012-10-21 Online:2013-03-25 Published:2013-03-25

摘要: 结合格子玻尔兹曼方法(Lattice Boltzmann Method,简称LBM)和多块网格(Multi-Block Grid)技术,数值研究较小雷诺数(Re=100)下均匀来流绕串列对转双圆柱问题,综合分析圆柱中心间距比S/D和圆柱无量纲旋转速度α对流场结构的影响,考察前、后圆柱的涡脱落形态和升阻力特性.结果表明:当间距比为1.2时存在一临界旋转比αc,转速超过这一值后前圆柱产生负Magnus效应;间距比为2时,流场出现类似单旋转圆柱时的第二不稳定模态;当间距比较大(S/D=4、6)时,前、后柱之间存在涡脱落,后柱尾涡中出现2S、2S*、2P、P+S等多种形态.

关键词: 串列双圆柱, 旋转, 格子Boltzmann方法, 多块网格

Abstract: Flows past a pair of rotating circular cylinders in tandem arrangement at Re=100 are studied numerically.Multi-block lattice Boltzmann method(LBM) is used.Basic features of vortex shedding and forces acting on rotating circular cylinders are studied with comprehensive analysis of impact of cylindrical center spacing ratio S/D and rotational speed α.There exists a critical rotating speed at S/D=1.2,exceeding which the former cylinder produces a negative Magnus lift;As S/D=2,flow field emerges a second unstable mode similar to a single rotating cylinder;At relative large spacings(S/D=4、6),vortex sheds between cylinders.Wake flows of the later cylinder present a variety of forms of 2S、2S*、2P、P+S and so on.

Key words: tandem circular cylinders, rotating, lattice Boltzmann method, multi-block

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