Methodology for Particle Characterization in the Exhaust Flows of Gas Turbine Engines

REFERENCES

• Ahn , K. H. and Liu , B. Y. H. 1990 . Particle Activation and Droplet Growth Processes in Condensation Nucleus Counter—II. Experimental Study . J. Aerosol Sci. , 21 : 263 – 275 .
   Web of Science ®Google Scholar
• Allen , M. D. and Raabe , O. G. 1985 . Slip Correction Measurements for Aerosol Particles in an Improved Millikan Apparatus . Aerosol Sci. Technol. , 4 : 269 – 286 .
   Web of Science ®Google Scholar
• Alofs , D. J. and Balakumar , P. 1982 . Inversion to Obtain Aerosol Size Distributions from Measurements with a Differential Mobility Analyzer . J. Aerosol Sci. , 13 : 513 – 527 .
   Web of Science ®Google Scholar
• Alofs , D. J. , Lutrus , C. K. , Hagen , D. E. , Sem , G. J. and Blesener , J. L. 1995 . Intercomparison Between Commercial Condensation Nucleus Counters and an Alternating Temperature Gradient Cloud Chamber . Aerosol Sci. Technol. , 23 : 239 – 249 .
   Web of Science ®Google Scholar
• Appel , B. R. , Tokiwa , Y. and Kothny , E. L. 1983 . Sampling of Carbonaceous Particles in Atmosphere . Atmos. Environ. , 17 : 1787 – 1796 .
   Web of Science ®Google Scholar
• Arnold , E. , Schlager , H. , Whitefield , P. D. and Hagen , D. E. 1997 . Atmospheric SO2—Pollution and Condensation Nuclei Formation: Evidence from Aircraft Measurements over the North Atlantic . Geophys. Res. Lett. , 24 : 57 – 60 .
   Web of Science ®Google Scholar
• Brockmann , J. E. 1993 . “ Sampling and Transport of Aerosols. ” . In Aerosol Measurement Edited by: Willeke , K. and Baron , K. A. 77 – 111 . New York : Van Nostrand Reinhold .
   Google Scholar
• Brown , R. C. , Miake-Lye , R. C. , Anderson , M. R. , Kolb , C. E. and Resch , T. J. 1996 . Aerosol Dynamics in Near Field Aircraft Plumes . J. Geophys. Res. , 101 : 22,939 – 22,953 .
   Google Scholar
• Champagne , D. L. 1971 . Standard Measurement of Aircraft Gas Turbine Engine Exhaust Smoke . ASME , 71-GT-88
   Google Scholar
• Cheng , Y. S. 1993 . “ Condensation Detection and Diffusion Size Separation Techniques. ” . In Aerosol Measurement Edited by: Willeke , K. and Baron , K. A. 427 – 451 . New York : Van Nostrand Reinhold .
   Google Scholar
• Crump , J. G. , Flagan , R. C. and Seinfeld , J. H. 1983 . Particle Wall Loss Rates in Vessels . Aerosol Sci. Technol. , 2 : 303 – 309 .
   Web of Science ®Google Scholar
• De Champlain , A. , Kretschmer , D. , Tsogo , J. and Pearce , G. F. 1997 . Prediction of Soot Emissions in Gas-Turbine Combustors . J. Propulsion Power , 13 : 117 – 122 .
   Google Scholar
• Delattre , P. and Friedlander , S. K. 1978 . Aerosol Coagulation and Diffusion in a Turbulent Jet . I EC Fund. , 17 : 189 – 194 .
   Google Scholar
• Dutton , J. A. 2002 . Committee on Aeronautics Research and Technology for Environmental Compatibility Report: “For Greener Skies—Reducing Environmental Impacts of Aviation ” National Research Council, Washington DC
   Google Scholar
• Endo , Y. , Fukushima , N. , Tashiro , S. and Kousaka , Y. 1997 . Performance of a Scanning Differential Mobility Analyzer . Aerosol Sci. Technol. , 26 : 43 – 50 .
   Web of Science ®Google Scholar
• Fenton , D. L. , Luebcke , E. H. and Norstrom , E. 1979 . “ Physical Characterization of Particulate Material from a Turbine Engine. ” . In Proc. Gas Turbine Conference and Exhibit and Solar Energy Conference , ASME publication 79-GT-179. San Diego
   Google Scholar
• Flower , W. L. 1983 . Measurement of the Diffusion Coefficient for Soot Particles in Flames . Phys. Rev. Lett. , 51 : 2287 – 2290 .
   Google Scholar
• Fraser , D. A. 1956 . The Collection of Submicron Particles by Electrostatic Precipitation . Amer. Ind. Hyg. Assoc. Quart. , 17 : 75
   PubMedGoogle Scholar
• Fuchs , N. A. 1963 . On the Stationary Charge Distribution on Aerosol Particles in a Bipolar Ionic Atmosphere . Geofis. Pura Appl. , 56 : 185 – 193 .
   Google Scholar
• Fuchs , N. A. and Satugin , A. G. 1965 . Coagulation Rate of Highly Dispersed Aerosols . J. Coll. Sci. , 20 : 492 – 500 .
   Google Scholar
• Gebhart , J. 1993 . “ Optical Direct-Reading Techniques: Light Intensity Systems. ” . In Aerosol Measurement Edited by: Willeke , K. and Baron , K. A. 313 – 344 . New York : van Nostrand Reinhold .
   Google Scholar
• Hagen , D. E. and Alofs , D. J. 1983 . Linear Inversion Method to Obtain Aerosol Size Distributions from Measurements with a Differential Mobility Analyzer . Aerosol Sci. Technol. , 2 : 465 – 475 .
   Web of Science ®Google Scholar
• Hagen , D. E. , Lutrus , C. K. , Trueblood , M. B. , Whitefield , P. D. , Alofs , D. J. , Dominguez-Sommer , L. R. , Futrell , J. R. C. and Institute of Environmental Sciences . 1993 . “ Use of an Alternating Gradient Cloud Chamber to Measure the Performance of a Condensation Nucleus Counter. ” . In Proceedings of 39th Meeting of the Institute of Environmental Sciences 319 – 335 . Las Yegas, NY , 2–7 May 1993
   Google Scholar
• Hagen , D. E. , Trueblood , M. B. and Whitefield , P. D. 1992 . A Field Sampling of Jet Exhaust Aerosols . Particle Sci. Technol. , 10 : 53 – 63 .
   Google Scholar
• Hagen , D. , Whitefield , P. , Paladino , J. , Trueblood , M. and Lilenfeld , H. 1998 . Particulate Sizing and Emission Indices for a Jet Engine Exhaust Sampled at Cruise . Geophys. Res. Letts. , 25 : 1681 – 1684 .
   Web of Science ®Google Scholar
• Harris , S. J. and Maricq , M. M. 2002 . The Role of Fragmentation in Defining the Signature Size Distribution of Diesel Soot . J. Aerosol Sci. , 33 : 935 – 942 .
   Web of Science ®Google Scholar
• Haywood , J. M. and Shine , K. P. 1995 . The Effect of Anthropogenic Sulfate and Soot Aerosol on the Clear-Sky Planetary Radiation Budget . Geohpys. Res. Lett. , 22 : 603 – 606 .
   Web of Science ®Google Scholar
• Hepp , H. and Siegmann , K. 1998 . Mapping of Soot Particles in a Weakly Sooting Diffusion Flame by Aerosol Techniques . Comb. Flame , 115 : 275 – 283 .
   Google Scholar
• Heymsfield , A. J. , Lawson , R. P. and Sachse , G. W. 1998 . Growth of Ice Crystals in Precipitating Contrail . Geophys. Res. Letts. , 25 : 1335 – 1338 .
   Google Scholar
• Hilton , M. and Black , J. D. 1998 . “ Detection of Soot Particles in Gas Turbine Combustion Gases Using Non Intrusive FTIR Spectroscopy. ” . In Proc. of SPIE—The International Society for Optical Engineering, Fundamental Problems of Laser Optics Edited by: Rosanov , Nikolay N. 20 – 31 . St. Petersburg, , Russia 22–26 June
   Google Scholar
• Holub , R. F. and Hvorka , J. 2001 . Particles in High-Pressure Cylinder Gases . Aerosol Sci. Technol. , 32 : S377 – S378 .
   Google Scholar
• Hoppel , W. A. and Frick , G. M. 1990 . The Nonequilibrium Character of the Aerosol Charge Distributions Produced by Neutralizers . Aerosol Sci. Technol. , 12 : 471 – 496 .
   Web of Science ®Google Scholar
• Howard , R. , ed. 1996 . Experimental Characterization of Gas Turbine Emissions at Simulated Flight Altitude Conditions Manchester, TN : AEDC . (Ed.)., AEDC-TR-96–3 June
   Google Scholar
• Howard , R. P. , Hiers , R. S. , Whitefield , P. D. , Hagen , D. E. , Wormhoudt , J. C. , Miake-Lye , R. C. and Strange , R. 1996 . Experimental Characterization of Gas Turbine Emissions at Simulated Flight Altitude Conditions Manchester, TN : Arnold Engineering Development Center . AEDC-TR-96–3
   Google Scholar
• Huebert , B. J. , Lee , G. L. and Warren , W. L. 1990 . Airborne Aerosol Inlet Passing Efficiency Measurement . J. Geohpys. Res. , 95 : 16,369 – 16,381 .
   Web of Science ®Google Scholar
• Hussin , A. , Scheibel , H. G. , Becker , K. H. and Porstendörfer , J. 1983 . Bipolar Diffusion Charging of Aerosol Particles – I: Experimental Results Within the Diameter Range 4–30 nm . J. Aerosol Sci. , 14 : 671 – 677 .
   Web of Science ®Google Scholar
• Jokinen , V. and Mäkelä , J. M. 1997 . Closed-Loop Arrangement with Critical Orifice for DMA Sheath/Excess Flow System . J. Aerosol Sci. , 28 : 643 – 648 .
   Web of Science ®Google Scholar
• Kärcher , B. and Fahey , D. W. 1995 . The Role of Sulphur Emission in Volatile Particle Formation in Jet Aircraft Exhaust Plumes . Geophys. Res. Lett. , 24 : 389 – 392 .
   Google Scholar
• Kärcher , B. , Peter , T. , Biermann , U. M. and Schumann , U. 1996 . The Initial Composition of Jet Condensation Trails . J. Atmos. Sci. , 53 : 3066 – 3083 .
   Web of Science ®Google Scholar
• Kauffeldt , T. , Schmidt-Ott , A. , Hild , O. and Backer , H. 1997 . On Line Measurement of the Soot Particle Size Distribution During the Combustion Process Inside a Diesel Engine . J. Aerosol Sci. , 28 : S45 – S45 .
   Google Scholar
• Kauffeldt , T. , Heinrich , P. , Kames , J. and Schmidt-Ott , A. 2001 . Filter Test with Soot Similar Test Aerosols . J. Aerosol Sci. , 32 : S1073 – S1074 .
   Google Scholar
• Kinney , P. D. , Pui , D. Y. H. , Mulholland , G. W. and Bryner , N. P. 1991 . Use of the Electrical Classification Method to Size 0.1 μ n SRM Particles—A Feasibility Study . J. Res. Natl. Inst. Stand. Technol. , 96 : 147 – 176 .
   PubMed Web of Science ®Google Scholar
• Knutson , E. O. and Whitby , K. T. 1975 . Aerosol Classification by Electric Mobility: Apparatus, Theory, and Applications . J. Aerosol Sci. , 6 : 443 – 451 .
   Google Scholar
• Köylö , Ü. Ö. , Faeth , G. M. , Farias , T. L. and Carvalho , M. G. 1995 . Fractal and Projected Structure of Soot Aggregates . Comb. Flame , 100 : 612 – 633 .
   Google Scholar
• Lee , K. W. and Ramamurthi , M. 1993 . “ Filter Collection. ” . In Aerosol Measurement Edited by: Willeke , K. and Baron , K. A. 427 – 451 . New York : Van Nostrand Reinhold .
   Google Scholar
• Lekhtmakher , S. O. 1990 . Data Reduction of Measurements with Particle Size-Selective Optical Counters . J. Aerosol Sci. , 21 : 61 – 71 .
   Google Scholar
• Leong , K. H. , Hopke , P. K. , Stukel , J. J. and Wang , H. C. 1983 . Radiolytic Condensation Nuclei in Aerosol Neutralizers . J. Aerosol Sci. , 14 : 23 – 27 .
   Google Scholar
• Lichtford , R. J. , Sun , F. , Few , J. D. and Lewis , J. W. L. 1998 . Optical Measurement of Gas Turbine Engine Soot Particle Effluents . J. Eng. Gas Turbines Power , 120 : 69 – 75 .
   Google Scholar
• Liscinsky , D. S. , Colket , M. B. , Hall , R. J. , Bhargava , A. , True , B. and Morford , S. 2000 . “ Comparison of Particulate Sizing Techniques in Sooting Premixed Flames ” . In 38th Aerospace Sciences Meeting and Exhibit 2000 – 0954 . Reno, NV : AIAA . 10–13 January
   Google Scholar
• Liu , B. Y. H. and Pui , D. Y. H. 1974 . A Submicron Aerosol Standard and the Primary, Absolute Calibration of the Condensation Nucleus Counter . J. Colloid Interface Sci. , 47 : 155 – 171 .
   Web of Science ®Google Scholar
• Matsoukas , T. and Friedlander , S. K. 1991 . Dynamics of Aerosol Agglomerate Formation . J. Colloid Interface Sci. , 146 : 495 – 506 .
   Web of Science ®Google Scholar
• McDermott , W. T. , Ockovic , R. C. and Stolzenburg , M. R. 1991 . Counting Efficiency of an Improved 30-Angstrom Condensation Nucleus Counter . Aerosol Sci. Technol. , 14 : 278 – 287 .
   Web of Science ®Google Scholar
• Montassier , N. , Boulaud , D. and Renoux , A. 1991 . Experimental Study of Thermophoretic Particle Deposition in Laminar Tube Flow . J. Aerosol Sci. , 22 : 677 – 687 .
   Web of Science ®Google Scholar
• Morewitz , H. A. 1982 . Leakage of Aerosols from Containment Buildings . Health Phys. , 42 : 195 – 207 .
   PubMedGoogle Scholar
• Morrow , P. E. and Mercer , T. T. 1964 . A Point-to-Plane Electrostatic Precipitator for Particle Size Sampling . Ind. Hyg. J. , 25 : 8 – 14 .
   PubMedGoogle Scholar
• Novick , V. J. 1994 . Plugging of Passages with Particles: Refining the Morewitz Criteria . Aerosol Sci. Technol. , 21 : 219 – 222 .
   Web of Science ®Google Scholar
• Paladino , J. , Whitefield , P. , Hagen , D. , Hopkins , A. R. and Trueblood , M. 1998 . Particle Concentration Characterization for Jet Engine Emissions Under Cruise Conditions . Geophys. Res. Lett. , 25 : 1697 – 1700 .
   Web of Science ®Google Scholar
• Paladino , J. , Hagen , D. E. , Whitefield , P. D. , Hopkins , A. R. , Schmid , O. and Wilson , M. R. 2000 . Observations of Particulates within the North Atlantic Flight Corridor: POLINAT II Sept–Oct 1997 . J. Geophys. Res. , 105 : 3719 – 3726 .
   Google Scholar
• Penner , J. E. , Lister , D. H. , Griggs , D. J. , Dokken , D. J. and McFarland , M. , eds. 1999 . Aviation and the Global Atmosphere , IPCC Report 373 Cambridge, , UK : Cambridge University Press . (Eds.)
   Google Scholar
• Popovitcheva , O. B. , Trukhin , M. E. , Persiantseva , N. M. and Shonija , N. K. 2001 . Water Adsorption on Aircraft-Combustor Soot Under Young Plume Conditions . Atmos. Environ. , 35 : 1673 – 1676 .
   Google Scholar
• Pruppacher , H. R. and Klett , J. D. 1978 . Microphysics of Clouds and Precipitation Boston : D. Reidel .
   Google Scholar
• Pueschel , R. F. , Blake , D. F. , Snetsinger , K. G. , Hansen , A. D. A. , Verma , S. and Kato , K. 1992 . Black Carbon (soot) Aerosol in the Lower Stratosphere and Upper Troposphere . Geophys. Res. Lett. , 19 : 1659 – 1662 .
   Google Scholar
• Rutter , A. P. 2002 . The Chemical and Aerosol Characteristics of Stratospheric Rocket Exhaust Plumes Rolla : University of Missouri . MS thesis
   Google Scholar
• SAE Aerospace Recommended Practice ARP 1179 Rev B (Aircraft Gas Turbine Engine Exhaust Smoke Measurement) , ICAO Environmental Annex 16 volume 2
   Google Scholar
• Samet , J. M. , Dominici , E. , Curriero , F. C. , Coursac , I. and Zeger , A. L. 2000 . “ Fine Particulate Air Pollution and Mortality in 20 U. S. Cities, 1987–1994 ” . In N. Engl. J. Med. Vol. 343 , 1742 – 1749 .
   Google Scholar
• Schäfer , K. , Heland , J. , Lister , D. H. , Wilson , C. W. , Howes , R. J. , Falk , R. S. , Lindermeir , E. , Birk , M. , Wagner , G. , Haschberger , P. , Bernard , M. , Legras , O. , Wiesen , P. , Kurtenbach , R. , Brockmann , K. J. , Kriesche , V. , Hilton , M. , Bishop , G. , Clarke , R. , Workman , J. , Caola , M. , Geatches , R. , Burrows , R. , Black , J. D. , Herve , P. and Vally , J. 2000 . Nonintrusive Optical Measurements of Aircraft Engine Exhaust Emissions and Comparison with Standard Intrusive Techniques . Appl. Opt. , 39 : 441 – 455 .
   PubMed Web of Science ®Google Scholar
• Schlager , H. , Konopka , P. , Schulte , P. , Ziereis , H. , Arnold , F. , Hagen , D. , Whitefield , P. and Ovarlez , J. 1997 . In situ Observations of Air Traffic Emission Signatures in the North Atlantic Flight Corridor . J. Geophys. Res. , 102 : 10,739 – 10,750 .
   Google Scholar
• Schmid , O. 2000 . Tandem Differential Mobility Analyzer Studies and Aerosol Volatility Rolla : University of Missouri . Ph.D. diss
   Google Scholar
• Schmid , O. , Eimer , B. , Hagen , D. E. and Whitefield , P. D. 2002 . Investigation of Volatility Method for Measuring Aqueous Sulfuric Acid on Mixed Aerosol . Aerosol Sci. Technol. , 36 : 877 – 889 .
   Web of Science ®Google Scholar
• Schulte , P. and Schlager , H. 1996 . In-Flight Measurements of Nitric Acid Oxide Emission Indices of Commercial Jet Aircraft . Geophys. Res. Lett. , 23 : 165 – 168 .
   Google Scholar
• Schumann , U. , Schlager , H. , Arnold , F. , Ovarlez , J. , Kelder , H. , Hov , Ø. , Hayman , G. , Issaksen , I. S. A. , Staehelin , J. and Whitefield , P. D. 2000 . Pollution from Aircraft Emissions in the North Atlantic Right Corridor: Overview on the POLINAT Projects . J. Geophys. , 105 : 3605 – 3631 .
   Google Scholar
• Schumann , U. , Strom , J. , Busen , R. , Kallmann , R. , Gierens , K. , Krautstrunk , M. , Schroder , F. P. and Stingl , J. 1996 . In Situ Observations of Particles in Jet Aircraft Exhausts and Contrails for Different Sulfur Containing Fuels . J. Geophys. Res. , 101 : 6853 – 6869 .
   Web of Science ®Google Scholar
• Sem , G. J. 1979 . “ Electrical Aerosol Analyzer: Operation, Maintenance, and Application. ” . In Aerosol Measurement Edited by: Lundren , D. A. Gainsville : University Press of Florida .
   Google Scholar
• Skillas , G. , Kunzel , S. , Burtscher , H. , Baltensperger , U. and Siegmann , K. 1998 . High Fractal-like Dimension of Diesel Soot Agglomerates . J. Aerosol Sci. , 29 : 411 – 419 .
   Web of Science ®Google Scholar
• Skillas , G. , Burtscher , H. , Siegmann , K. and Baltensperger , U. 1999 . Density of Fractal-like Dimension of Particle from a Laminar Diffusion Flame . J. Colloid Interface Sci. , 217 : 269 – 274 .
   PubMed Web of Science ®Google Scholar
• Smyth , K. C. and Shaddix , C. R. 1996 . The Elusive History of m = 1.57−0.56i for the Refractive Index of Soot . Comb. Flame , 107 : 314 – 320 .
   Web of Science ®Google Scholar
• Solomon , S. , Borrmann , S. , Garcia , R. R. , Portmann , R. , Thomason , L. , Poole , L. R. , Winker , D. and McCormick , M. P. 1997 . Heterogeneous Chlorine Chemistry in the Tropopause Region . J. Geophys. Res. , 102 : 21,411 – 21,429 .
   Google Scholar
• Sommer , H. T. , Futrell , J. R. C. , Dominguez-Sommer , L. R. and Self , T. W. 1992 . “ Condensation Nucleus Counter for Certification of Process Gas Supply Systems. ” . In Proc. Intl. Symposium on Contamination Control 511 – 515 . Mount Prospect, IL : Institute of Environmental Sciences .
   Google Scholar
• Sorensen , C. M. 2001 . Light Scattering by Fractal Aggregates: A Review . Aerosol Sci. Technol. , 35 : 648 – 687 .
   Web of Science ®Google Scholar
• Steven , D. C. 1986 . Review of Aspiration Coefficients of Thin-Walled Sampling Nozzles . J. Aerosol. Sci. , 17 : 729 – 743 .
   Google Scholar
• Stolzenburg , M. R. and McMurry , P. H. 1991 . An Ultrafine Aerosol Condensation Nucleus Counter . Aerosol Sci. Technol. , 14 : 48 – 65 .
   Web of Science ®Google Scholar
• Strawa , A. W. , Drdla , K. , Ferry , G. V. , Verma , S. , Pueschel , R. F. , Yasuda , M. , Salawitch , R. J. , Gao , R. S. , Howard , S. D. , Bui , P. T. , Loewenstein , M. , Elkins , J. W. , Perkins , K. K. and Cohen , R. 1999 . Carbonaceous Aerosol (Soot) Measured in the Lower Stratosphere during POLARIS and its Role in Stratospheric Photochemistry . J. Geophys. Res. , 104 : 26,753 – 26.766 .
   Google Scholar
• Tohno , S. and Takahashi , K. 1990 . Morphology and Dynamic Characterization of Pb Fume Particles Undergoing Brownian Coagulation . J. Aerosol Sci. , 21 : 719 – 732 .
   Google Scholar
• Vander Wal , R. L. 1997 . A TEM Methodology for the Study of Soot Panicle Structure . Combust. Sci. Tech. , 126 : 333 – 357 .
   Web of Science ®Google Scholar
• Vartiainen , M. , McDow , S. R. and Kamens , R. M. 1994 . Water Uptake by Aerosol Particles from Automobile Exhaust and Wood Smoke . Chemosphere , 29 : 1661 – 1669 .
   Google Scholar
• Vaughn , E. U. 1978 . Simple Model of Plugging of Ducts by Aerosol Deposits. . ANS Trans. , 28 : 507 – 508 .
   Google Scholar
• Wainner , R. T. , Seitzman , J. M. and Martin , S. R. 1999 . Soot Measurements in a Simulated Engine Exhaust Using Laser-Induced Incandescence . AIAA J. , 37 : 738 – 743 .
   Google Scholar
• Wang , S. C. and Flagan , R. C. 1989 . Scanning Electrical Mobility Spectrometer . J. Aerosal Sci. , 20 : 1485 – 1488 .
   Web of Science ®Google Scholar
• Weingartner , E. , Baltensberger , U. and Burtscher , H. 1995 . Growth and Structural Change of Combustion Aerosols at High Relative Humidity . Environ. Sci. Technol. , 29 : 2982 – 2986 .
   PubMed Web of Science ®Google Scholar
• Wen , H. Y. and Kasper , G. 1989 . On the Kinetics of Particle Reeintrainment from Surfaces . J. Aerosol Sci. , 20 : 483 – 498 .
   Web of Science ®Google Scholar
• Wey , C. C. 1999 . Workshop on Aerosols and Particulates from Aircraft Gas Turbine Engines , NASA/CP-1999–208918, June.
   Google Scholar
• Wiedensohler , A. 1988 . An Approximation of the Bipolar Charge Distribution for Particles in the Submicron Size Range . J. Aerosol Sci. , 19 : 387 – 389 .
   Web of Science ®Google Scholar
• Wiedensohler , A. , Lütkemeier , E. , Feldpausch , M. and Helsper , C. 1986 . Investigation of the Bipolar Charge Distribution at Various Gas Conditions . J. Aerosol Sci. , 17 : 413 – 416 .
   Web of Science ®Google Scholar
• Winklmayr , W. , Ramamurthi , M. , Strydom , R. and Hopke , P. K. 1990 . Size Distribution Measurements of Ultrafine Aerosols, dp > 1.8 nm. Formed by Radiolysis in a Diameter Measurement Analyzer Aerosol Charger . Aerosol Sci. Technol. , 13 : 394 – 398 .
   Web of Science ®Google Scholar
• Wofsy , S. C. , Cohen , R. C. and Schmeltekopf , A. L. 1998 . Engine Gaseous, Aerosol Precursor and Particulate at Simulated Flight Altitude Conditions , NASA/TM-1998–208509 October
   Google Scholar