Commercial Aircraft Engine Emissions Characterization of in-Use Aircraft at Hartsfield-Jackson Atlanta International Airport

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• 作者：Scott C. Herndon ; John T. Jayne ; Prem Lobo ; Timothy B. Onasch ; Gregg Fleming ; Donald E. Hagen ; Philip D. Whitefield ; Richard C. Miake-Lye
• 刊名：Environmental Science & Technology
• 出版年：2008
• 出版时间：March 15, 2008
• 年：2008
• 卷：42
• 期：6
• 页码：1877 - 1883
• 全文大小：4820K
• 年卷期：v.42,no.6(March 15, 2008)
• ISSN：1520-5851

文摘

The emissions from in-use commercial aircraft engines have been analyzed for selected gas-phase species and particulate characteristics using continuous extractive sampling 1–2 min downwind from operational taxi- and runways at Hartsfield-Jackson Atlanta International Airport. Using the aircraft tail numbers, 376 plumes were associated with specific engine models. In general, for takeoff plumes, the measured NO_x emission index is lower (~18%) than that predicted by engine certification data corrected for ambient conditions. These results are an in-service observation of the practice of “reduced thrust takeoff”. The CO emission index observed in ground idle plumes was greater (up to 100%) than predicted by engine certification data for the 7% thrust condition. Significant differences are observed in the emissions of black carbon and particle number among different engine models/technologies. The presence of a mode at ~65 nm (mobility diameter) associated with takeoff plumes and a smaller mode at ~25 nm associated with idle plumes has been observed. An anticorrelation between particle mass loading and particle number concentration is observed.