教師資料查詢 | 類別: 期刊論文 | 教師: 張正興 Cheng-hsin Chang (瀏覽個人網頁)

標題:Dilution Rates for Tailpipe Emissions: Effects of Vehicle Shape, Tailpipe Position, and Exhaust Velocity
學年97
學期2
出版(發表)日期2009/06/01
作品名稱Dilution Rates for Tailpipe Emissions: Effects of Vehicle Shape, Tailpipe Position, and Exhaust Velocity
作品名稱(其他語言)
著者Chang, Victor W.-C.; Hildemann, Lynn M.; Chang, Cheng-hisn
單位淡江大學土木工程學系
出版者Pittsburgh: Air &; Waste Management Association
著錄名稱、卷期、頁數Journal of the Air and Waste Management Association 59(6), pp.715-724
摘要The rate at which motor vehicle exhaust undergoes dilution with ambient air will greatly affect the size distribution characteristics of the particulate emissions. Wind tunnel experiments were conducted to investigate the impacts of vehicle shape, tailpipe orientation, and exhaust exit velocity on the dilution profiles under steady driving conditions for three model vehicles: a light-duty truck, a passenger car, and a heavy-duty tractor head. A three dimensional array of 60 sensors provided simultaneous measurements of dilution ratios for the emissions in the near- and far-wake regions downstream of the vehicle. The processes underlying the observations were investigated via nondimensionalization. Many of the trends seen substantially downstream can be well generalized using a simple nondimensionalization technique; however, this is not true in the near-wake region (within a downstream distance equivalent to a few vehicle heights). In the near-wake region, using the vehicle width and length to normalize for the vehicle shape is not enough to fully account for the variations seen. Including the exhaust flow rate in the nondimensionalization process is effective further downwind but does not adequately capture the complexity in the near-wake region. Tailpipe orientation and location are also shown to be influential factors affecting the near-wake dilution characteristics.
關鍵字
語言英文
ISSN2162-2906;1047-3289
期刊性質國外
收錄於SCI
產學合作
通訊作者Chang, Victor W.-C.
審稿制度
國別美國
公開徵稿
出版型式紙本;電子版
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