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下击暴流出流段非稳态风场的大气边界层风洞模拟

钟永力 晏致涛 李妍 杨小刚 蒋森

钟永力,晏致涛,李 妍,等. 下击暴流出流段非稳态风场的大气边界层风洞模拟[J]. 实验流体力学,2021,35(6):1-8 doi: 10.11729/syltlx20200131
引用本文: 钟永力,晏致涛,李 妍,等. 下击暴流出流段非稳态风场的大气边界层风洞模拟[J]. 实验流体力学,2021,35(6):1-8 doi: 10.11729/syltlx20200131
ZHONG Y L,YAN Z T,LI Y,et al. Experimental study on simulation of unsteady downburst outflow in atmospheric boundary layer wind tunnel[J]. Journal of Experiments in Fluid Mechanics, 2021,35(6):1-8. doi: 10.11729/syltlx20200131
Citation: ZHONG Y L,YAN Z T,LI Y,et al. Experimental study on simulation of unsteady downburst outflow in atmospheric boundary layer wind tunnel[J]. Journal of Experiments in Fluid Mechanics, 2021,35(6):1-8. doi: 10.11729/syltlx20200131

下击暴流出流段非稳态风场的大气边界层风洞模拟

doi: 10.11729/syltlx20200131
基金项目: 国家自然科学基金(52008070,51778097);重庆市教委科学技术研究计划青年项目(KJQN202001511);重庆科技学院科研项目(ckrc2019039)
详细信息
    作者简介:

    钟永力:(1989–),男,贵州遵义人,博士。研究方向:结构风工程,计算流体力学。通信地址:重庆市沙坪坝区大学城东路20号重庆科技学院建筑工程学院产教融合大楼(401331)。E-mail:yonglizhong@qq.com

    通讯作者:

    E-mail:zhitaoyan@qq.com

  • 中图分类号: TU311

Experimental study on simulation of unsteady downburst outflow in atmospheric boundary layer wind tunnel

  • 摘要: 为在风洞实验室中实现大尺度下击暴流出流段风场模拟,基于平面壁面射流方法,设计制作了一套下击暴流出流段非稳态风场的模拟装置。通过增加壁面射流喷口及风机,得到下击暴流的水平平均风速竖向剖面。采用快开阀门形成非稳态的突变风场,以安德鲁斯空军基地下击暴流实测数据作为对比目标,对模拟装置进行了验证。结果表明:设计的基于壁面射流的下击暴流模拟装置能够有效模拟下击暴流出流段风场;稳态条件下,装置能够形成较为均匀的二维平面壁面射流流场,在完全发展区域,能够得到与典型下击暴流竖向平均风速剖面较为吻合的结果;采用非稳态的壁面射流装置,能够得到与实际下击暴流非常接近的时变平均风速。
  • 图  1  典型微下击暴流示意图[14]

    Figure  1.  Schematic diagram of micro-downburst[14]

    图  2  壁面射流装置图

    Figure  2.  Modifications to boundary layer wind tunnel

    图  3  快开阀门装置示意图

    Figure  3.  Schematic diagram of quick opening valve device

    图  4  不同顺流向位置平均风速剖面

    Figure  4.  Mean velocity profiles at various streamwise locations

    图  5  不同顺流向位置湍流度剖面

    Figure  5.  Turbulent intensity profiles at various streamwise locations

    图  6  无量纲平均风速剖面

    Figure  6.  Normalized mean velocity profiles

    图  7  非稳态风场测量的探头布置

    Figure  7.  Probe arrangement for unsteady wind field measurement

    图  8  不同测量高度风速同步

    Figure  8.  wind speed synchronization of fixed probe data (unsynchronized and synchronized)

    图  9  不同高度同步后的风速时程

    Figure  9.  Synchronized velocity time histories at various heights

    图  10  最大时变平均风速竖向剖面

    Figure  10.  Vertical profile of maximum time-varying mean velocity

    图  11  Andrews AFB 下击暴流移动平均风速时程[1]

    Figure  11.  Moving-averaged wind speed history of Andrews AFB downburst[1]

    图  12  风洞试验结果与目标下击暴流风场时变平均风速对比

    Figure  12.  Comparison of simulated and recorded time-varying mean velocity

    图  13  湍流度竖向剖面

    Figure  13.  Vertical profiles of turbulent intensity

    图  14  80 mm高度处特征时间内脉动风速功率谱

    Figure  14.  PSD of residual fluctuating velocity during characteristic time at 80 mm height

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出版历程
  • 收稿日期:  2020-10-30
  • 修回日期:  2020-12-10
  • 网络出版日期:  2021-11-12

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