摘要
本文通过大气边界层风洞的模拟实验,介绍一种在风洞中模拟近地面大气边界层的方法。根据大风地区的现场实测资料,对大气的风剖面及湍流度等有关参数,提出了一些特殊的要求。常规的模拟方法难以保证与实际风环境的相似,为此专门研制了一种在保证平均风剖面相似的前提下,可使气流产生大湍流度的装置,简称湍流度调节器。通过对模拟边界层的平均风速、湍流度及风速谱的测量分析,证明与实际风区大风环境的风结构相当一致。为解决实际低矮构筑物的风载荷问题,取得了良好的模拟效果,提供了可靠的实验数据。
Presented in this article is an experimental method of simulating near surface atmospheric boundary layer. Some specific requirements have been raised for simulating the wind profile and turbulence features according to the in-situ measurements, which are difficult to meet with conventional simulation procedures. A specific mechanism was invented to create large turbulence intensity while keep the mean velocity profile simulated. The measurements of wind profile, turbulence intensity and the wind spectrum using this method turned out to be fairly well agreed with those obtained in-situ in real gust zone in xinjian province. This kind of means (called turbulence regulator) is of value in providing reliable experimental data for problems of simulating aerodynamic load on low constructions.
出处
《空气动力学学报》
CSCD
北大核心
1993年第4期373-379,共7页
Acta Aerodynamica Sinica
基金
国家自然科学基金
关键词
模拟
风剖面
湍流度
风速谱
simulation, wind profile, turbulence, wind spectrum.
