| 利用尖劈和粗糙元技术模拟大气边界层的研究 |
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| 引用本文： | 徐洪涛,廖海黎,李明水,何勇.利用尖劈和粗糙元技术模拟大气边界层的研究[J].公路交通科技,2009,26(9). |
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| 作者姓名： | 徐洪涛 廖海黎 李明水 何勇 |
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| 作者单位： | 1. 西南交通大学,风工程试验研究中心,四川,成都,610031
2. 交通部公路科学研究所,北京,100088 |
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| 基金项目： | 国家自然科学基金资助项目 |
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| 摘 要： | 在尖劈和粗糙元大气边界层模拟技术的基础上增加了格栅挡板这一涡旋发生器,有效地提高了风洞上方的湍流强度,利用该组合边界层发生装置建立了边界层风场.测量了模拟风场的平均风速剖面,湍流强度剖面,风谱等参数.讨论了格栅挡板增加后风场平均风速剖面和湍流强度剖面的变化.三角形尖劈阻风面积沿高度递减产生近似线性的风速剖面,粗糙元调整平均风速和湍流度剖面分布,格栅挡板提高了风洞上方的湍流度.结果分析表明:试验所得风场满足模型试验所要求的小粗糙度和大湍流度的要求.然而,模拟风场的湍流功率谱和积分尺度的高度变化规律和实际大气边界层相反,这是由尖劈下宽上窄的构造特点所决定的.
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| 关 键 词： | 桥梁工程 大气边界层模拟 风洞试验 尖劈 粗糙元 格栅挡板 |
Simulation of Atmosphere Boundary Layer by Using Wedge and Roughness Element Technique |
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| XU Hongtao,LIAO Haili,LI Mingshui,HE Yong.Simulation of Atmosphere Boundary Layer by Using Wedge and Roughness Element Technique[J].Journal of Highway and Transportation Research and Development,2009,26(9). |
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| Authors: | XU Hongtao LIAO Haili LI Mingshui HE Yong |
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| Institution: | 1.Wind Engineering Test and Research Center;Southwest Jiaotong University;Chengdu Sichuan 610031;China;2.Research Institute of Highway;Ministry of Communications;Beijing 100088;China |
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| Abstract: | Based on the technique that using wedges and roughness elements to simulate the atmospheric boundary layer,barriers acting as vortex generators were used to effectively increase turbulence intensity on top of wind tunnel.The wind field of atmosphere boundary layer was established by using the devices combination.The mean velocity profile,turbulence intensity profile and power spectra of the simulated wind field were all measured.The changes of mean velocity profile and turbulence intensity profile after add... |
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| Keywords: | bridge engineering simulation of atmosphere boundary layer wind tunnel test wedge roughness element barrier |
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