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端板对二维矩形风洞试验模型气动特性的影响

郑云飞 刘庆宽 马文勇 刘小兵

郑云飞, 刘庆宽, 马文勇, 等. 端板对二维矩形风洞试验模型气动特性的影响[J]. 实验流体力学, 2017, 31(3): 38-45. doi: 10.11729/syltlx20170015
引用本文: 郑云飞, 刘庆宽, 马文勇, 等. 端板对二维矩形风洞试验模型气动特性的影响[J]. 实验流体力学, 2017, 31(3): 38-45. doi: 10.11729/syltlx20170015
Zheng Yunfei, Liu Qingkuan, Ma Wenyong, et al. Effects of end plates on aerodynamic force of rectangular prisms in wind tunnel test[J]. Journal of Experiments in Fluid Mechanics, 2017, 31(3): 38-45. doi: 10.11729/syltlx20170015
Citation: Zheng Yunfei, Liu Qingkuan, Ma Wenyong, et al. Effects of end plates on aerodynamic force of rectangular prisms in wind tunnel test[J]. Journal of Experiments in Fluid Mechanics, 2017, 31(3): 38-45. doi: 10.11729/syltlx20170015

端板对二维矩形风洞试验模型气动特性的影响

doi: 10.11729/syltlx20170015
基金项目: 

国家自然科学基金资助项目 51378323

国家自然科学基金资助项目 51108280

国家自然科学基金资助项目 51308359

河北省杰出青年基金项目 E2014210138

详细信息
    作者简介:

    郑云飞(1985-), 男, 河北邢台人, 博士研究生。研究方向:桥梁风荷载与风致振动控制。通信地址:石家庄铁道大学风工程研究中心(050043)。E-mail:yunfeizheng@foxmail.com

    通讯作者:

    刘庆宽, E-mail:lqk@stdu.edu.cn

  • 中图分类号: U441.3

Effects of end plates on aerodynamic force of rectangular prisms in wind tunnel test

  • 摘要: 在节段模型风洞试验中,两端设置端板可以有效减小端部效应对风压分布的影响,从而保证气流在模型周围的二维流动,其中端板尺寸是影响端板效果的主要参数。为了明确不同尺寸端板对矩形断面气动特性的影响,以桥梁节段模型中最常见的3种宽高比(B/H分别为1、5和10)的二维矩形断面为研究对象,通过刚性模型测压试验,研究了端板尺寸对各模型的气动力、风压分布和斯托罗哈数St的影响。研究结果表明:模型的端部效应不仅仅对端部附近的风压有影响,对中间位置处风压的影响也不容忽视,设置端板是获得准确试验结果的重要保证;随着断面宽高比(B/H)逐渐增大,端部效应影响的程度和范围逐渐减小;随着端板尺寸的增大,模型背风面风压绝对值逐渐增大并趋向一稳定值;抑制端部效应的最小端板尺寸与结构的风迎角有关,风迎角增大,所需的端板也相应增大;有无端板对斯托罗哈数St也有明显影响。
  • 图  1  模型安装图(单位:mm)

    Figure  1.  Sketch of installation of test model(Unit: mm)

    图  2  模型点布置图(单位:mm)

    Figure  2.  Sketch of pressure tap arrangement of test model(Unit: mm)

    图  3  B/H=1模型各圈气动力随端板尺寸的变化规律(α=15°)

    Figure  3.  Aerodynamic force coefficients of rectangular cylinder (B/H=1) with various diameters of end plates (α=15°)

    图  4  B/H =1模型气动力随端板尺寸的变化规律

    Figure  4.  Aerodynamic force coefficients of rectangular cylinder (B/H=1) with various diameters of end plates

    图  5  B/H =5模型气动力随端板宽度的变化规律

    Figure  5.  Aerodynamic force coefficients of rectangular cylinder (B/H=5) with various widths of end plates

    图  6  B/H=5模型气动力随端板高度的变化规律

    Figure  6.  Aerodynamic force coefficients of rectangular cylinder (B/H=5) with various heights of end plates

    图  7  B/H=10模型气动力随端板高度的变化规律

    Figure  7.  Aerodynamic force coefficients of rectangular cylinder (B/H=5) with various widths of end plates

    图  8  B/H=10模型气动力随端板高度的变化规律

    Figure  8.  Aerodynamic force coefficients of rectangular cylinder (B/H=5) with various heights of end plates

    图  9  B/H=1模型F圈风压分布随端板尺寸的变化规律

    Figure  9.  Wind pressure coefficients of rectangular cylinder (B/H=1) with various diameters of end plates

    图  10  B/H=5模型F圈风压分布随端板尺寸的变化规律(α=10°)

    Figure  10.  Wind pressure coefficients of rectangular cylinder (B/H=5) with various sizes of end plates (α=10°)

    图  11  B/H =10模型F圈风压系数随端板尺寸的变化规律(α=10°)

    Figure  11.  Wind pressure coefficients of rectangular cylinder (B/H=10) with various sizes of end plates (α=10°)

    图  12  B/H=1模型St随端板尺寸的变化规律(α=45°)

    Figure  12.  St of rectangular cylinder (B/H=1) with various diameters of end plates (α=45°)

    图  13  B/H=5模型St随端板尺寸的变化规律(α=10°)

    Figure  13.  St of rectangular cylinder (B/H=5) with various sizes of end plates (α=10°)

    图  14  B/H=10模型St随端板尺寸的变化规律(α=10°)

    Figure  14.  St of rectangular cylinder (B/H=10) with various sizes of end plates (α=10°)

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出版历程
  • 收稿日期:  2017-01-20
  • 修回日期:  2017-04-19
  • 刊出日期:  2017-06-25

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