空气层结对港口细煤粉污染扩散的影响分析  

Influnce analysis of air stratification to proliferation of fine mine particle pollution in port

作　　者：彭士涛[1] 丛晓春[1,2] 戴明新[1] 陈香[2] 

机构地区：[1]交通运输部天津水运工程科学研究所水路交通环境保护技术交通行业重点实验室,天津300456 [2]山东科技大学土木建筑学院,青岛266510

出　　处：《水道港口》2011年第3期219-222,共4页Journal of Waterway and Harbor

基　　金：国家自然科学基金(50808115);山东省自然科学基金项目(2009ZRB01240)

摘　　要：通过分析空气层结对港口细煤粉扩散的影响,得出离源0.5 km处稳定层结、中性层结及不稳定层结3种层结条件下污染物的浓度峰值分别为1.3 mg/m3、0.27 mg/m3和0.02 mg/m3,同时得出5.5 m/s、7 m/s两种风速条件下的污染物浓度峰值。结果表明,湍流处于不稳定层结时,浓度分布峰值相对较小;随着层结逐渐趋于稳定,浓度随着下风向距离的延伸逐渐降低;出现地面最大浓度的距离随稳定度的增加而增大。In this paper,the diffusion of air stratification to proliferation of fine mine particle pollution in port was analyzed.The peak concentrations of pollutants under stable stratification,neutral stratification and unstable stratification were 1.3 mg/m3、0.27 mg/m3、0.02 mg/m3 when the distance from the source was 0.5 km.And the peak concentrations of pollutants were given when the wind velocity were 5.5 m/s and 7 m/s.The corresponding conclusions are as follows：the concentration distribution is relatively small peak when turbulence in an unstable stratification;with stratification became stable,the concentration is decreased along with the extension of downwind distance.The distance of the ground largest concentration will increase with the increase of stability.

关 键 词：大气层结 细煤粉 扩散模式 最大浓度距离 

分 类 号：X169[环境科学与工程—环境科学]