A kinetic microphysical modeling approach that describes the formation of volatile aerosols in the presence of organic emissions in near field aircraft emitted plumes at ground level is presented. Our model suggests that self nucleation of organic species, binary nucleation of water-soluble organic vapors with water, and multicomponent nucleation of water-soluble organic vapors with sulfuric acid and water all have very slow nucleation rates. The formation of new homogeneous particles in near field aircraft plumes is thus considered to be driven by binary nucleation of sulfuric acid and water. Volatile organic vapors emitted from aircraft engines primarily contribute to the nucleation process by condensing on existing homogeneous aerosols and only affect the size and the composition (not the number) of the homogeneous aerosols. Our model also shows that under low ambient relative humidity levels or high ambient temperatures, nucleation mode particles are more organic-rich than soot coatings. Organic mass fraction of nucleation mode particles is more sensitive to organic emissions levels compared to that of soot coatings. Ambient temperature and relative humidity were also predicted to affect the nucleation of sulfuric acid–water cores, where higher ambient relative humidity level and lower ambient temperature strongly favor binary sulfuric acid–water nucleation. The effect of ambient conditions on organic fractions was predicted to be relatively insignificant.
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July 2015
Research-Article
Roles of Organic Emissions in the Formation of Near Field Aircraft-Emitted Volatile Particulate Matter: A Kinetic Microphysical Modeling Study
Hsi-Wu Wong,
Hsi-Wu Wong
1,2
Center for Aero-Thermodynamics,
e-mails: hwwong@aerodyne.com;
HsiWu_Wong@uml.edu
Aerodyne Research, Inc.
,45 Manning Road
,Billerica, MA 01821
e-mails: hwwong@aerodyne.com;
HsiWu_Wong@uml.edu
1Present address: University of Massachusetts Lowell, Lowell, MA 01854.
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Mina Jun,
Mina Jun
Department of Aeronautics and Astronautics,
e-mail: minajun@mit.edu
Massachusetts Institute of Technology
,77 Massachusetts Avenue
,Cambridge, MA 02139
e-mail: minajun@mit.edu
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Jay Peck,
Jay Peck
Center for Aero-Thermodynamics,
e-mail: jpeck@aerodyne.com
Aerodyne Research, Inc.
,45 Manning Road
,Billerica, MA 01821
e-mail: jpeck@aerodyne.com
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Ian A. Waitz,
Ian A. Waitz
Department of Aeronautics and Astronautics,
e-mail: iaw@mit.edu
Massachusetts Institute of Technology
,77 Massachusetts Avenue
,Cambridge, MA 022139
e-mail: iaw@mit.edu
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Richard C. Miake-Lye
Richard C. Miake-Lye
Center for Aero-Thermodynamics,
e-mail: rick@aerodyne.com
Aerodyne Research, Inc.
,45 Manning Road
,Billerica, MA 01821
e-mail: rick@aerodyne.com
Search for other works by this author on:
Hsi-Wu Wong
Center for Aero-Thermodynamics,
e-mails: hwwong@aerodyne.com;
HsiWu_Wong@uml.edu
Aerodyne Research, Inc.
,45 Manning Road
,Billerica, MA 01821
e-mails: hwwong@aerodyne.com;
HsiWu_Wong@uml.edu
Mina Jun
Department of Aeronautics and Astronautics,
e-mail: minajun@mit.edu
Massachusetts Institute of Technology
,77 Massachusetts Avenue
,Cambridge, MA 02139
e-mail: minajun@mit.edu
Jay Peck
Center for Aero-Thermodynamics,
e-mail: jpeck@aerodyne.com
Aerodyne Research, Inc.
,45 Manning Road
,Billerica, MA 01821
e-mail: jpeck@aerodyne.com
Ian A. Waitz
Department of Aeronautics and Astronautics,
e-mail: iaw@mit.edu
Massachusetts Institute of Technology
,77 Massachusetts Avenue
,Cambridge, MA 022139
e-mail: iaw@mit.edu
Richard C. Miake-Lye
Center for Aero-Thermodynamics,
e-mail: rick@aerodyne.com
Aerodyne Research, Inc.
,45 Manning Road
,Billerica, MA 01821
e-mail: rick@aerodyne.com
1Present address: University of Massachusetts Lowell, Lowell, MA 01854.
2Corresponding author.
Contributed by the Turbomachinery Committee of ASME for publication in the JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Manuscript received August 22, 2014; final manuscript received November 19, 2014; published online January 21, 2015. Editor: David Wisler.
J. Eng. Gas Turbines Power. Jul 2015, 137(7): 072606 (10 pages)
Published Online: July 1, 2015
Article history
Received:
August 22, 2014
Revision Received:
November 19, 2014
Online:
January 21, 2015
Citation
Wong, H., Jun, M., Peck, J., Waitz, I. A., and Miake-Lye, R. C. (July 1, 2015). "Roles of Organic Emissions in the Formation of Near Field Aircraft-Emitted Volatile Particulate Matter: A Kinetic Microphysical Modeling Study." ASME. J. Eng. Gas Turbines Power. July 2015; 137(7): 072606. https://doi.org/10.1115/1.4029366
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