Commercial Aircraft Engine Emissions Characterization of In-Use Aircraft At Hartsfield-Jackson Atlanta International Airport

Abstract

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 NOx 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.

Department(s)

Mechanical and Aerospace Engineering

Second Department

Physics

Third Department

Chemistry

Sponsor(s)

Center of Excellence for Aerospace Particulate Emissions Reductions
United States. Federal Aviation Administration
United States. National Aeronautics and Space Administration

Keywords and Phrases

Commercial Aircraft Engines; Gas-Phase Species; Particulate Characteristics; Takeoff Plumes

International Standard Serial Number (ISSN)

0013-936X

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2008 American Chemical Society (ACS), All rights reserved.

Publication Date

01 Mar 2008

Link to Full Text

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