稳态雷暴冲击风风速剖面模型研究

PDF(2248 KB)

振动与冲击 ›› 2016, Vol. 35 ›› Issue (15) : 74-79.

论文

稳态雷暴冲击风风速剖面模型研究

邹鑫1，汪之松1,2,，李正良1,2

作者信息 +

Study on wind velocity profile of steady thunderstorm downburst

ZOU xin1, WANG zhisong1, 2, LI zhengliang1, 2

Author information +

文章历史 +

摘要

雷暴冲击风是非台风地区形成极值风荷载的主要原因。采用静止型冲击射流装置和大涡模拟分别对雷暴冲击风风场进行了物理试验和数值模拟，考察了径向风速和竖向风速的分布特征。将大涡模拟结果和试验结果与现有实测数据和理论模型进行了对比，验证了试验和数值模拟结果的可靠性。针对现有的径向风速模型并不适用于所有径向位置处径向风速的问题，结合物理实验和大涡模拟的结果，提出了沿径向变化的径向风速剖面模型。同时，根据风场竖向风速的特点将其沿径向位置分为三个区域，给出了三个区域竖向风速剖面模型。

Abstract

Thunderstorm downburst is the main reason for the formation of extreme wind loads in the non-typhoon area. In this paper, both static impinging jet instrument and large eddy simulation (LES) have been used to do the experiment and numerical simulation for thunderstorm downburst. The distribution of radial and vertical velocity has been investigated. Given the existing radial velocity profile model doesn’t apply to the radial velocity at all radial locations, combined the experiment and LES results, a new radial velocity profile which suits all radial locations is proposed. Meanwhile, the wind flied is divided into three part according to the characteristic of vertical velocity, the vertical velocity profile is presented for all the three part.

关键词

雷暴冲击风 / 冲击射流模型 / 大涡模拟 / 风场特性

引用本文

EndNote

Ris (Procite)

Bibtex

导出引用

邹鑫1，汪之松1,2,，李正良1,2. 稳态雷暴冲击风风速剖面模型研究[J]. 振动与冲击, 2016, 35(15): 74-79

ZOU xin1, WANG zhisong1, 2, LI zhengliang1, 2. Study on wind velocity profile of steady thunderstorm downburst[J]. Journal of Vibration and Shock, 2016, 35(15): 74-79

参考文献

[1] C.W. Letchford, C. Mans, M.T. Chay, Thunderstorms—their importance in Wind Engineering, a case for the next generation wind tunnel, JAWE J. Wind Eng. 89 (2001) 31–43.
[2] 谢强，张勇，李杰．华东电网500kV 任上5237 线飑线风致倒塔事故调查分析[J]．电网技术，2006，30(10)：59-63．
Xie Qiang，Zhang Yong，Li Jie．Investigation on tower collapses of 500kV RenShang 5237 transmission line caused by downburst[J]．Power System Technology，2006，30(10)：59-63.
[3] Fujita TT. The Downburst. Report of Projects NIMROD and JAWS, University of Chicago: T.T. Fujita, 1985.
[4] Oseguera R M, Bowles R L. A simple analytic 3-dimensional downburst model based on boundary layer stagnation inflow [R]. NASA Technical Memorandum 100632, 1988.
[5] Vicroy D D. A simple, analytical, asymmetric microburst model for downdraft estimation [R]. NASA Technical Memorandum 104053, 1991.
[6] Holmes J D, Oliver S E. An Empirical Model of a Downburst [J]. Engineering Structures, 2000, 22:1167-1172.
[7] Chay M.T., Albermani F., Wilson R. Numerical and analytical simulation of downburst wind loads [J]. Engineering Structures, 2006, 28(2): 240-254.
[8] G S Wood, K C S Kwok, N A Motteram, D.F. Fletcher. Physical and numerical modeling of thunderstorm downbursts [J]. Wind Eng.Ind.Arodyn.2001, (89):535-552.
[9] Sengupta, A. and P.P. Sarkar. Experimental measurement and numerical simulation of an impinging jet with application to thunderstorm microburst winds [J]. JOURNAL OF WIND ENGINEERING AND INDUSTRIAL AERODYNAMICS, 2008. 96(3): 345-365.
[10] Vermeire B.C., Orf L.G., Savory E. Improved modelling of downburst outflows for wind engineering applications using a cooling source approach [J]. Journal of Wind Engineering and Industrial Aerodynamics, 2011, 99 (8), 801-814.
[11] Yan Zhang, Hui Hu and P.P. Sarkar. Modeling of microburst outflows using impinging jet and cooling source approaches and their comparison [J].Engineering Structures, 56(2013): 779-793.
[12] Orf L, Kantor E, Savory E. Simulation of a downburst-producing thunderstorm using a very high-resolution three-dimensional cloud model [J]. Journal of Wind Engineering and Industrial Aerodynamics, 2012, 104–106:547–557.
[13] 李宏海，欧进萍. 雷暴冲击风作用下建筑物表面风压分布模拟[C]. 第19届全国结构工程学术会议论文集（第Ⅲ册）. 北京：《工程力学》，2010:76-80
Li honghai, Ou jingping. Numerical simulation of the wind-induced pressure distribution on building surface in downburst[C]. Proceeding of 19th National Conference on Structure Engineering. Beijing, China, Engineering Mechanics, 2010:76-80.
[14] 陈勇，彭志伟，楼文娟等. 冲击风稳态流场CFD模拟及三维风速经验模型研究[J]. 计算力学学报，2010,27（3）：428.
Chen Yong, Peng Zhiwei, Lou Wenjuan, et al. CFD simulations of steady downburst and 3D wind velocity empirical models [J]. Chinese Journal of Computational Mechanics, 2010, 27(3):428.
[15] 陈勇，柳国光，徐挺，余世策. 运动雷暴冲击风水平风速时程分析及现象模型[J]. 同济大学学报（自然科学版），2012,40(1):22-26.
Chen yong, Liu guoguang, Xu ting, Yu shice. Time Histories of Horizontal Wind Velocity of Moving Thunderstorms and Phenomenological Model [J]. Journal of Tongji University (Natural Science), 2012, 40(1):22-26.
[16] 瞿伟廉, 吉柏锋, 李健群, 王锦文. 下击暴流风的数值仿真研究[ J]. 地震工程与工程振动, 2008, 28(5): 133-139.
QU WEI- LIAN, JI BAI- FENG, LI JIAN-QUN, WANG JIN-WEN. The study on numerical simulation of downburst wind [J]. Journal of earthquake engineering and engineering vibration, 2008, 28(5): 133- 139.
[17] 汤卓，吕令毅. 雷暴冲击风作用下地面风压分布特征[ J]. 东南大学学报（自然科学版）, 2011, 41(6): 1273-1276.
Tang Zhuo, Lü Lingyi. Wind pressure distribution on ground under impingement of downbursts[J]．Journal of Southeast University(Natural Science Edition)，2011，41( 6) : 1273-1276．
[18] 李锦华,吴春鹏,陈水生.下击暴流非平稳脉动风速数值模拟[J].振动与冲击,2014,33(14):54-60.
LI Jin-hua, WU Chun-peng, CHEN Shui-sheng. Simulation of non-stationary fluctuating wind velocity in downburst [J].Journal of Vibration and Shock, 2014, 33(14):54-60.