中等雷诺数下倾斜方板绕流直接数值模拟
DOI:
作者:
作者单位:

作者简介:

通讯作者:

基金项目:


Direct Numerical Simulation on Flow Past Inclined Thin Square Plate at Moderate Reynolds Number
Author:
Affiliation:

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
    摘要:

    为探究倾斜正方形板(简称方板)的尾流特性,采用直接数值模拟方法对雷诺数Re为300,固定放置于均匀来流中的倾斜方板绕流进行模拟,研究方板的升阻力系数、三维尾涡结构和泄涡机制等流动特性。方板的边长厚度比为50。讨论倾斜角度([0°,75°],0°对应方板垂直置于均匀来流的情况)对方板尾流的影响,结果表明:当Re为300,方板垂直于来流放置时,板后流动已经进入湍流状态;随着方板倾斜角度的增加,板后尾流由湍流状态先转换为准周期状态,再进入周期状态,最后在大角度倾斜时,板后尾流又返回湍流状态。

    Abstract:

    Direct numerical simulation is performed for the wake flow behind an inclined square plate. The hydrodynamic characteristics, including the force coefficients, the three-dimensional vortical structures and vortex shedding process, are presented. Side lengththickness ratio of the square plate is selected as 50. The effects of incidence angle ([0°,75°], 0° refers to the condition in which the flow is normal to the plate) on the wake transition are discussed. The flow behind the square plate is found to be chaotic at Reynolds number of 300 when the flow is normal to the plate. It is observed that as the incidence angle increases, the flow firstly changes from a chaotic state to a periodic state and finally returns to chaos again at high incidence angles.

    参考文献
    相似文献
    引证文献
引用本文

赵亚坤,田新亮.中等雷诺数下倾斜方板绕流直接数值模拟[J].中国海洋平台,2020,(06):

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
历史
  • 收稿日期:
  • 最后修改日期:
  • 录用日期:
  • 在线发布日期: 2021-01-08