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Research Papers: Gas Turbines: Combustion, Fuels, and Emissions

Uptake Coefficients of Some Volatile Organic Compounds by Soot and Their Application in Understanding Particulate Matter Evolution in Aircraft Engine Exhaust Plumes

[+] Author and Article Information
Zhenhong Yu

Aerodyne Research, Inc.,
45 Manning Road,
Billerica, MA 01821
e-mail: zyu@aerodyne.com

David S. Liscinsky

United Technologies Research Center,
411 Silver Lane,
East Hartford, CT 06108
e-mail: LiscinDS@utrc.utc.com

Bruce True

United Technologies Research Center,
411 Silver Lane,
East Hartford, CT 06108
e-mail: TrueBS@utrc.utc.com

Jay Peck

Aerodyne Research, Inc.,
45 Manning Road,
Billerica, MA 01821
e-mail: jpeck@aerodyne.com

Archer C. Jennings

United Technologies Research Center,
411 Silver Lane,
East Hartford, CT 06108
e-mail: jenninac@utrc.utc.com

Hsi-Wu Wong

Aerodyne Research, Inc.,
45 Manning Road,
Billerica, MA 01821
e-mail: hwwong@aerodyne.com

Mina Jun

Massachusetts Institute of Technology,
77 Massachusetts Avenue,
Cambridge, MA 02139
e-mail: mina.jun@gmail.com

Jonathan Franklin

Aerodyne Research, Inc.,
45 Manning Road,
Billerica, MA 01821
e-mail: jfranklin@aerodyne.com

Scott C. Herndon

Aerodyne Research, Inc.,
45 Manning Road,
Billerica, MA 01821
e-mail: herndon@aerodyne.com

Ian A. Waitz

Massachusetts Institute of Technology,
77 Massachusetts Avenue,
Cambridge, MA 02139
e-mail: iaw@mit.edu

Richard C. Miake-Lye

Aerodyne Research, Inc.,
45 Manning Road,
Billerica, MA 01821
e-mail: rick@aerodyne.com

1Corresponding author.

Contributed by the Combustion and Fuels Committee of ASME for publication in the JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Manuscript received March 25, 2014; final manuscript received April 7, 2014; published online June 27, 2014. Editor: David Wisler.

J. Eng. Gas Turbines Power 136(12), 121501 (Jun 27, 2014) (8 pages) Paper No: GTP-14-1166; doi: 10.1115/1.4027707 History: Received March 25, 2014; Revised April 07, 2014

To assist microphysical modeling on particulate matter (PM) evolution emitted from aircraft engines, uptake coefficients of some volatile organic compounds on soot were experimentally determined in this study. The determined values vary from (1.0 ± 0.1) × 10−6 for water-miscible propylene glycol to (2.5 ± 0.1) × 10−5 for 2,6-dimethylnaphthalene, a polycyclic aromatic hydrocarbon. An inverse power-law correlation between uptake coefficient on soot and solubility in water was observed. Using the correlation, microphysical simulations were performed for the exhaust plume evolution from an idling aircraft, and we found that the model-predicted volatile PM composition on soot is comparable with those results from past field measurements.

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References

Figures

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Fig. 1

A portion of simultaneous HFID and CToF-AMS measurements on uptake of phenol by soot

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Fig. 2

The SMPS measurement on soot particle growth from uptake of 15.6 ppm phenol

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Fig. 3

The BET adsorption isotherm of the denuded combustion soot particles from mini-CAST soot generator

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Fig. 4

The power-law correlation between γ and S, where γ is the determined uptake coefficient on soot and S is solubility in water. The linear regression fit yields a = −0.30 ± 0.02 and constant C = −5.41 ± 0.02, with a correlation coefficient, R2= 0.998, implying a very strong correlation.

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Fig. 5

The simulated mass fraction of naphthalene, methylnaphthalene, dimethylnaphthalene, and phenol on soot emitted from CFM56 aircraft engine. The determined uptake coefficients in this study were used as dry mass accommodation coefficients in the modeling.

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Fig. 6

The simulated mass fraction of sulfuric acid in vapor phase, liquid droplets, and coated on soot surface emitted from a CFM56 aircraft engine

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Fig. 7

Volume increase per particle versus downstream distance, due to volatile PM composition coated on soot surface, including organics, sulfuric acid and water

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