江汉大学学报（自然科学版）2025，Vol.53Issue(1)：24-34,11.DOI:10.16389/j.cnki.cn42-1737/n.2025.01.003
高层楼房爆破拆除冲击气流对颗粒物传输的模拟分析
Simulation Analysis of Impact Airflow on Particle Transport in High-rise Building Demolition by Blast
摘要
Abstract
The impact airflow generated by the demolition of a building carries dust into the atmosphere,thus affecting its quality.In this study,a dispersion box model for the dust generated by high-rise building demolition was established,combining the gas-solid two-phase flow model and using the computational fluid dynamics(CFD)method to simulate and analyze the directional transfer of dust during controlled demolition on different environmental wind speeds and flow regimes.The results showed that the movement of shock wave vortices was related to the flow regime,with vortices forming and moving faster under turbulent flow conditions compared to laminar flow conditions.The propagation vortices played a crucial role in the transport of dust.Under the combined influence of the propagation vortices and the bottom base vortices,80%of the demolition dust on the lee side was entrained into the vortices,with lower dust mass concentrations at the center of the vortices compared to the edges.The demolition dust moved downwind with the vortex flow,impacting an area approximately 200 meters downwind.关键词
爆破粉尘时空分布/开放性粉尘/DPM模型分析/局部空气质量分析/冲击气流Key words
patiotemporal distribution of blasting dust/open dust/discrete phase model analysis/local air quality analysis/impact airflow分类
建筑与水利引用本文复制引用
严佳宁,姚芮,秦萌,唐振淞,秦亮,石零..高层楼房爆破拆除冲击气流对颗粒物传输的模拟分析[J].江汉大学学报（自然科学版）,2025,53(1):24-34,11.基金项目
江汉大学校级创新项目(2021kjzx004) （2021kjzx004）
中国国家铁路集团有限公司科技研究开发计划重点课题(N2023G011) （N2023G011）
