Commercial Aircraft Engine Emissions Characterization of In-Use Aircraft At Hartsfield-Jackson Atlanta International Airport
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.
S. C. Herndon et al., "Commercial Aircraft Engine Emissions Characterization of In-Use Aircraft At Hartsfield-Jackson Atlanta International Airport," Environmental Science and Technology, vol. 42, no. 6, pp. 1877-1883, American Chemical Society (ACS), Mar 2008.
The definitive version is available at http://dx.doi.org/10.1021/es072029+
Mechanical and Aerospace Engineering
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)
Article - Journal
© 2008 American Chemical Society (ACS), All rights reserved.