Recent measurements have suggested that soot properties can evolve downstream of the combustor, changing the characteristics of aviation particulate matter (PM) emissions and possibly altering the subsequent atmospheric impacts. This paper addresses the potential for the post-combustion thermodynamic environment to influence aircraft non-volatile PM emissions. Microphysical processes and interactions with gas phase species have been modeled for temperatures and pressures representative of in-service engines. Time-scale arguments are used to evaluate the relative contributions that various phenomena may make to the evolution of soot, including coagulation growth, ion-soot attachment, and vapor condensation. Then a higher-fidelity microphysics kinetic is employed to estimate the extent to which soot properties evolve as a result of these processes. Results suggest that limited opportunities exist for the modification of the size distribution of the soot, its charge distribution, or its volatile content, leading to the conclusion that the characteristics of the turbine and nozzle of an aircraft engine have little or no influence on aircraft non-volatile emissions. Combustor processing determines the properties of soot particulate matter emissions from aircraft engines, setting the stage for interactions with gaseous emissions and development as cloud condensation nuclei in the exhaust plume.
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ASME Turbo Expo 2005: Power for Land, Sea, and Air
June 6–9, 2005
Reno, Nevada, USA
Conference Sponsors:
- International Gas Turbine Institute
ISBN:
0-7918-4725-X
PROCEEDINGS PAPER
Post-Combustion Evolution of Soot Properties in an Aircraft Engine
Pierre M. Dakhel,
Pierre M. Dakhel
Massachusetts Institute of Technology, Cambridge, MA
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Stephen P. Lukachko,
Stephen P. Lukachko
Massachusetts Institute of Technology, Cambridge, MA
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Ian A. Waitz,
Ian A. Waitz
Massachusetts Institute of Technology, Cambridge, MA
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Richard C. Miake-Lye,
Richard C. Miake-Lye
Aerodyne Research, Inc., Billerica, MA
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Robert C. Brown
Robert C. Brown
Aerodyne Research, Inc., Billerica, MA
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Pierre M. Dakhel
Massachusetts Institute of Technology, Cambridge, MA
Stephen P. Lukachko
Massachusetts Institute of Technology, Cambridge, MA
Ian A. Waitz
Massachusetts Institute of Technology, Cambridge, MA
Richard C. Miake-Lye
Aerodyne Research, Inc., Billerica, MA
Robert C. Brown
Aerodyne Research, Inc., Billerica, MA
Paper No:
GT2005-69113, pp. 787-795; 9 pages
Published Online:
November 11, 2008
Citation
Dakhel, PM, Lukachko, SP, Waitz, IA, Miake-Lye, RC, & Brown, RC. "Post-Combustion Evolution of Soot Properties in an Aircraft Engine." Proceedings of the ASME Turbo Expo 2005: Power for Land, Sea, and Air. Volume 2: Turbo Expo 2005. Reno, Nevada, USA. June 6–9, 2005. pp. 787-795. ASME. https://doi.org/10.1115/GT2005-69113
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