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《Environmental Science》 2006-03
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Numerical Analysis of the Dispersion Characteristics of Vehicular Pollutants in Exhaust Plume Under Idle Condition

NING Zhi~1,Cheung C S~2,FU Juan~1,ZI Xin-yun~3,ZHANG Chun-run~3(1.College of Mechanical and Electrical Engineering,Beijing Jiaotong University,Beijing 100044,China;2.Department of Mechanical Engineering,The Hong Kong Polytechnic University,Hong Kong,China;3.Department of Automobile Engineering,College of Military Transportation,Tianjin 300161,China)  
The k-ε eddy dissipation model was used for the numerical simulation of the dispersing characteristics of vehicular exhaust plume under idle condition.The simulated results match very well with the experimental results.The effects of the initial emission concentration,exit velocity,exit direction and crosswind intensity were investigated parametrically.The initial pollutant concentration can increase the local concentrations but the pattern of dispersion remains the same.The exit velocity can increase the momentum of the jet,resulting in a deeper penetration downstream.The exit angle has stronger influence on pollutant dispersion than both initial pollutant concentration and exit velocity.Crosswind shows a significant effect on the dispersion of the exhaust plume also.It can divert the plume to disperse in the same direction of the wind with limited penetration in the downstream direction.
【Fund】: 国家自然科学基金项目(40475048);; 北京市自然科学基金项目(8042018);; 香港Croucher基金资助项目
【CateGory Index】: X734.2
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【References】
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【Citations】
Chinese Journal Full-text Database 1 Hits
1 NING Zhi 1,*,C S Cheung2,ZI Xinyun3,ZHANG Chunrun3 1.College of Mechanical and Electrical Engineering, Beijing Jiaotong University, Beijing 1000442.Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hong Kong3.Department of Automobile Engineering, College of Military Transportation, Tianjin 300161;Experimental study of the dispersion characteristics of vehicular pollutants in exhaust plume under idle condition[J];Acta Scientiae Circumstantiae;2005-09
【Co-citations】
Chinese Journal Full-text Database 7 Hits
1 FU Juan~1,NING Zhi~1,SU Li-ping~1,JIANG Da-hai~2,ZI Xin-yun~2(1.College of Mechanical and Electrical Engineering,Beijing Jiaotong University,Beijing 100044,China;2.Department of Automobile Engineering,College of Military Transportation,Tianjin 300161,China);Study on the Evolution Characteristics of the Particle Distribution in the Vehicle Exhaust Plume[J];Environmental Science;2007-05
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