摘要
选用不同的差分格式(Upwind, Hybrid, Hquick)对城市街道峡谷内部汽车污染物排放浓度进行了预测,并于风洞实验结果对比。研究表明,三种格式的计算结果和实验结果总体趋势一致,即背风面建筑物附近浓度远高于迎风面建筑物附近的浓度,地面附近浓度高于峡谷上方的浓度。相比之下,Hquick格式的预测性能最佳,应为首选。
Different differencing schemes (Upwind, Hybrid, and Hquick) were used to predict vehicle exhausted pollutant dispersion in an urban street canyon. The predicted results were compared with that of wind tunnel experiment. A general agreement between numerical results using the three different differencing schemes and experimental results was obtained, that is, there was much more pollutants on leeward side than on windward side of the buildings, and the concentration of pollutants was increasing with decrease of height of the building. The Hquick scheme is preferred since it can get the best result.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2005年第2期9-10,28,共3页
Environmental Science & Technology
基金
国家自然科学基金资助(50208011)
通用-中国科学研究基金资助(40122201)
关键词
街道峡谷
差分格式
数值模拟
风洞实验
street canyon
differencing scheme
numerical scheme
wind tunnel experiment
