高洋洋,张演明,刘彩,王滨.不同雷诺数下倾斜圆柱绕流三维数值模拟研究[J].海洋工程,2020,38(1):86~100
不同雷诺数下倾斜圆柱绕流三维数值模拟研究
Three-dimensional numerical simulation on flow past an inclined circular cylinder at different Reynolds numbers
  
DOI:10.16483/j.issn.1005-9865.2020.01.009
中文关键词:  倾斜圆柱绕流  三维数值模拟  雷诺数  倾斜角度  轴向流
英文关键词:flow past an inclined cylinder  three-dimensional simulation  Reynolds number  inclined angle  axial flow
基金项目:浙江省自然科学基金-华东院联合基金重点项目(LHZ19E090004)
作者单位E-mail
高洋洋 浙江大学 海洋学院浙江 舟山 316021 yygao@zju.edu.cn 
张演明 浙江大学 海洋学院浙江 舟山 316021  
刘彩 浙江大学 海洋学院浙江 舟山 316021  
王滨 中国电建集团华东勘测设计研究院有限公司浙江 杭州 311122  
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中文摘要:
      基于计算流体力学(CFD)开源代码OpenFOAM开展了不同雷诺数(Re=100、1 500和3 900)和倾斜角度(-60°≤ α≤ 60°)工况下倾斜圆柱绕流流场的三维数值模拟,研究倾斜圆柱绕流的三维瞬时及时均尾流流场、流线拓扑、升阻力系数与旋涡脱落频率随雷诺数及倾斜角度变化的规律,探讨在顺流向及逆流向情况下独立性原则对倾斜圆柱绕流的适用性。研究结果表明:随着圆柱倾角的增大,倾斜圆柱尾流产生较为明显的轴向流,尾流旋涡脱落受到明显抑制,细碎旋涡逐渐消失,尾流宽度随之减小;随着雷诺数的增大,圆柱尾流涡管发生明显的变形,展向掺混使得大量细碎旋涡产生,呈现出明显的三维特性。在不同雷诺数下,阻力系数均值、升力系数均方根及无量纲涡脱频率在一定倾角范围内符合独立性原则。
英文摘要:
      Three-dimensional numerical simulations are performed to investigate flow past a single inclined cylinder at different Reynolds numbers (Re=100, 1 500 and 3 900) and inclined angles (-60°≤ α ≤ 60°) based on the computational fluid dynamics (CFD) open source code OpenFOAM. The three-dimensional instantaneous and time-averaged wake flow patterns, streamline topology, force coefficients and vortex shedding frequencies are analyzed. The validations of the Independence Principle on flow past an inclined cylinder in both forward and backward directions are verified, respectively. The results show that the vortex shedding is gradually suppressed with increasing of the inclined angle due to the effect of axial flow, and with increasing of Reynolds number, the vortex tube is obviously deformed. For different Reynolds numbers, the mean drag coefficient, root mean square lift coefficient and non-dimensional vortex shedding frequencies are in accordance with the Independence Principle in a certain range of the inclined angles.
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