同济大学学报（自然科学版）2012，Vol.40Issue(1)：22-26,44,6.DOI:10.3969/j.issn.0253-374x.2012.01.004
运动雷暴冲击风水平风速时程分析及现象模型
Time Histories of Horizontal Wind Velocity of Moving Thunderstorms and Phenomenological Model
摘要
Abstract
A moving thunderstorm downburst is a sort of non-stationary flow field. In order to study the effects of inlet velocity, translational velocity of a storm, jet height, and the angle of downburst flow with the ground to the field, an experiment was conducted by an impinging jet device. A phenomenon model was proposed based on the experimental results. Under different parameters of downburst, this model is capable of obtaining various time histories of horizontal wind velocity. Finally, according to the different wind speed profiles, time histories of horizontal wind speed produced by combining vector summation method, were compared with those by phenomenological model. In the duration before the arrival of the down bursts, the comparison states a goodagreement between them except the Holmes & Oliver model, whereas it is found that the phenomenological model proposed herein has a stronger capacity of characterizing the variation of horizontal wind velocity in the duration of the departure of the downbursts.关键词
雷暴冲击风/非稳态流场/水平风速时程/经验公式Key words
thunderstorm downbursts/un-stationary wind field/time history of horizontal wind speed/empirical model分类
建筑与水利引用本文复制引用
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):22-26,44,6.基金项目
国家自然科学基金(50708096,50908208) （50708096,50908208）
"十一五"国家科技支撑计划(2006BAJ01B07-04) （2006BAJ01B07-04）
浙江省重点创新团队支持计划(2009R50050) （2009R50050）
