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雷诺数对圆柱气动力和流场影响的试验研究

刘庆宽 邵奇 郑云飞 李聪辉 马文勇 刘小兵

刘庆宽, 邵奇, 郑云飞, 等. 雷诺数对圆柱气动力和流场影响的试验研究[J]. 实验流体力学, 2016, 30(4): 7-13. doi: 10.11729/syltlx20150112
引用本文: 刘庆宽, 邵奇, 郑云飞, 等. 雷诺数对圆柱气动力和流场影响的试验研究[J]. 实验流体力学, 2016, 30(4): 7-13. doi: 10.11729/syltlx20150112
Liu Qingkuan, Shao Qi, Zheng Yunfei, et al. Experimental study on Reynolds number effect on aerodynamic pressure and forces of cylinder[J]. Journal of Experiments in Fluid Mechanics, 2016, 30(4): 7-13. doi: 10.11729/syltlx20150112
Citation: Liu Qingkuan, Shao Qi, Zheng Yunfei, et al. Experimental study on Reynolds number effect on aerodynamic pressure and forces of cylinder[J]. Journal of Experiments in Fluid Mechanics, 2016, 30(4): 7-13. doi: 10.11729/syltlx20150112

雷诺数对圆柱气动力和流场影响的试验研究

doi: 10.11729/syltlx20150112
基金项目: 

国家自然科学基金项目 51378323

国家自然科学基金项目 51108280

国家自然科学基金项目 51308359

河北省杰出青年科学基金 E2014210138

详细信息
    通讯作者:

    刘庆宽(1971-),男,河北保定人,博士,教授,博士生导师。研究方向:桥梁与结构的风荷载、风致振动与控制。通信地址:石家庄铁道大学风工程研究中心(050043)。E-mail:lqk@stdu.edu.cn

  • 中图分类号: U441+.3

Experimental study on Reynolds number effect on aerodynamic pressure and forces of cylinder

  • 摘要: 通过刚性模型测压风洞试验,研究了圆柱的气动阻力、气动升力系数和风压系数随雷诺数的变化规律,从流场分布的角度分析了气动力变化的原因,并研究了雷诺数影响下的流场在圆柱轴向的相关性。结果表明:在亚临界雷诺数区域,在时间平均上流场沿模型两侧呈对称分布,雷诺数对平均阻力系数和流场影响较小,平均升力系数基本为零。在临界雷诺数区域,随着特定区域大负压区的出现,流场不再对称,出现不容忽视的平均升力和脉动升力。在超临界雷诺数区域,随着对称侧大负压区的出现,流场恢复对称状态,平均升力基本消失。雷诺数对流场的轴向相关性有显著的影响。在雷诺数较低时(亚临界区域),卡门涡在轴向上的尺度相对较大,而随着雷诺数的提高,该尺度逐渐减小,各断面流场的相关性降低。
  • 图  1  风洞结构示意图

    Figure  1.  Sketch of wind tunnel

    图  2  低速试验段模型安装及测点布置图

    Figure  2.  Sketch of installation and pressure tap arrangement of test model in low speed test section

    图  3  高速试验段模型安装及测点布置图

    Figure  3.  Sketch of installation and pressure tap arrangement of test model in high speed test section

    图  4  模型气动力计算图

    Figure  4.  Aerodynamic force calculation diagram of test model

    图  5  气动力系数随雷诺数的变化曲线

    Figure  5.  Curve of aerodynamic force coefficient with Re

    图  6  亚临界雷诺数区域模型风压系数周向分布(Re=2.05×105)

    Figure  6.  Wind pressure coefficient distribution around test model in subcritical regime(Re=2.05×105)

    图  7  亚临界雷诺数区域模型瞬时风压周向分布向量图(Re=2.05×105)

    Figure  7.  Instantaneous wind pressure distribution vector diagram around test model in subcritical regime(Re=2.05×105)

    图  8  亚临界雷诺数区域模型驻点位置摆动图(Re=2.05×105)

    Figure  8.  Stagnation point position of test model in subcritical regime(Re=2.05×105)

    图  9  临界雷诺数区域模型风压系数周向分布(Re=3.55×105)

    Figure  9.  Wind pressure coefficient distribution around test model in critical regime(Re=3.55×105)

    图  10  临界雷诺数区域模型瞬时风压周向分布向量图(Re=3.55×105)

    Figure  10.  Instantaneous wind pressure distribution vector diagram around test model in critical regime(Re=3.55×105)

    图  11  超临界区域模型风压系数周向分布(Re=3.79×105)

    Figure  11.  Wind pressure coefficient distribution around test model in supercritical regime(Re=3.79×105)

    图  12  超临界雷诺数区域模型瞬时风压周向分布向量图(Re=3.79×105)

    Figure  12.  Instantaneous wind pressure distribution vector diagram around test model in supercritical regime(Re=3.79×105)

    图  13  相关系数同雷诺数和无量纲轴向间距的关系

    Figure  13.  Relation between correlation coefficient,Re,and dimensionless axial spaceing

    表  1  低速试验段模型试验工况

    Table  1.   Test cases in low speed test section

    风速范围/(m·s-1)风速步长/(m·s-1)Re/104
    5~132.09.3~24.3
    13~210.3/0.424.3~39.2
    下载: 导出CSV

    表  2  高速试验段模型试验工况

    Table  2.   Test cases in high speed test section

    风速范围/(m·s-1)风速步长/(m·s-1)Re/104
    13.7 ~ 40.92.710~30
    40.9 ~ 43.71.330~32
    下载: 导出CSV

    表  3  相关系数与相关程度对照表

    Table  3.   Table of correlation coefficient and degree

    相关系数0~±0.30±0.30~±0.50±0.50~±0.80±0.80~±1.00
    相关程度微相关实相关显著相关高度相关
    下载: 导出CSV
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出版历程
  • 收稿日期:  2015-08-28
  • 修回日期:  2016-04-28
  • 刊出日期:  2016-08-25

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