内河航道船舶大气污染物扩散模拟研究
Study on dispersion simulation of air pollutants from ships in inland waterways
雷智鹢 1宋雨恒 1马志宽1
作者信息
- 1. 河海大学 港口海岸与近海工程学院,南京 210098
- 折叠
摘要
为探究内河航道船舶大气污染物在沿岸建筑物群的扩散规律,基于船舶自动识别系统数据构建南京市内河某航道段船舶大气污染物排放计算模型,采用"自下而上"方法计算得到船舶SO2、NO2、PM10、PM2.5、CO和挥发性有机物6 种大气污染物排放量.通过Revit软件与Fluent软件建立船舶大气污染物在沿江居民区的扩散模型并进行可视化模拟分析.结果表明:在常风向全年平均风速条件下,污染物扩散与建筑群布局密切相关,在密集建筑物群背风面易出现负压区,该处污染物浓度较低,但在整体建筑物群背风面稍远处,出现气流旋涡区,导致较高浓度的污染物聚集,短期内产生持续污染影响.研究思路与结果可为航道沿岸居民区规划建设,降低船舶大气污染物影响提供理论依据.
Abstract
In order to investigate the diffusion pattern around the buildings nearby the river of air pollutants from ships in inland waterways,a numerical model of air pollutant emissions from ships in a waterway section in Nanjing was constructed,which based on the data from the automatic ship identification system.And the discharge amount of SO2,NO2,PM10,PM2.5,CO,and volatile organic compound(VOC)from the ships was got by using the"bottom-up"method.The diffusion model of air pollutants from ships around the residential area along the river was established by Revit software and Fluent software,and visual simulation analysis was carried out.The results show that the pollutant diffusion is closely related to the layout of the building group under the condition of annual average wind speed in the normal wind direction.The negative pressure zones appear on the leeward side of the dense building group,with lower pollutant concentration.Airflow vortex regions appear a little far away from the leeward side of the whole building group,which leads to a higher pollutant concentration with a continuous pollution impact in a certain term.The research ideas and results can provide a theoretical basis for the planning and construction of residential areas along the waterway.
关键词
船舶大气污染物/船舶自动识别系统/污染物扩散/可视化分析Key words
ship air pollutant emissions/automatic identification system/pollutant dispersion/visualization analysis引用本文复制引用
基金项目
国家重点研发计划(2021YFB2600203)
出版年
2024
国家科技期刊平台
NSTL
维普
万方数据