中小型露天建筑施工粉尘污染风洞试验研究  

Wind Tunnel Test Research on Dust Pollution in Small and Medium-sized Open-air Construction

作　　者：赵邵华[1] Zhao Shaohua(Hunan Urban Construction College,Department of Architecture and Civil Engineering,Xiangtan 411101,China)

机构地区：[1]湖南城建职业技术学院建筑工程系,湖南湘潭411101

出　　处：《环境科学与管理》2023年第3期98-102,共5页Environmental Science and Management

摘　　要：建筑施工粉尘污染风洞试验能够分析风力对结构的荷载效应,减少污染以及涡流等情况的发生,为此设计一个中小型露天建筑施工粉尘污染风洞试验。先制作风洞试验模型,然后采用粒子运动无量纲方程、相似准则计算风强度,计算风压差以及风洞中模拟气体扩散情况获得建筑施工粉尘污染值,以此完成试验模拟。结果表明,在0°~45°的风速范围内,粉尘的下落倾向比上升的要大;在90°~135°的风向下,粉尘的浓度维持在一个较稳定的水平,在1 mg/m~3左右;在180度时,在逆风方向上存在反吸力,并得到了不同风向角下的最大正压力系数。The wind tunnel test of construction dust pollution can analyze the load effect of wind on the structure and reduce the occurrence of pollution and eddy current.Therefore,a wind tunnel test of small and medium-sized outdoor construction dust pollution is designed.First,the study sets ups a wind tunnel test model,and then uses the dimensionless equation of particle motion and similarity criteria to calculate the wind intensity.The wind pressure differentiates and simulates the gas diffusion in the wind tunnel to obtain the construction dust pollution value,so as to complete the test simulation.The results show that in the range of 0~45 degree wind speed,the falling tendency of dust is greater than the rising tendency.In the wind direction of 90~135 degree,the dust concentration remains at a relatively stable level,about 1 mg/m~3.At 180 degrees,there is reverse suction in the upwind direction,and the maximum positive pressure coefficient under different wind directions is obtained.

关 键 词：露天建筑 施工 粉尘污染 风洞试验 气流 

分 类 号：X831[环境科学与工程—环境工程]