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Dilution of Aircraft Exhaust Plumes at Cruise Altitudes

Schumann, Ulrich and Schlager, H. and Arnold, F. and Baumann, R. and Haschberger, Peter and Klemm, O. (1998) Dilution of Aircraft Exhaust Plumes at Cruise Altitudes. Atmospheric Environment, 32, pp. 3097-3103. DOI: 10.1016/S1352-2310(97)00455-X.

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Official URL: http://www.elsevier.com/wps/find/journaldescription.cws_home/246/description#description

Abstract

The dilution of jet engine exhaust in the plume behind cruising aircraft is determined from measured plume properties. The data set includes in situ measurements of CO<sub>2</sub>, NO, NO<sub>y</sub>, SO<sub>2</sub>, H<sub>2</sub>O, temperature, and contrail diameters behind subsonic and supersonic aircraft in the upper troposphere and lower stratosphere, for plume ages of seconds to hours. The set of data is extended into the range of milliseconds based on computations and measured temperature values. The bulk plume dilution is expressed in terms of the dilution ratio N which is the mass of air with which the exhaust from a unit mass of burned fuel mixes. For: 0.006 s ‹ t ‹ 10<sup>4</sup> s, the bulk dilution ratio measured in more than 70 plume encounters follows approximately N=7000 (t/t<sub>0</sub>)<sup>0.8</sup>, t<sub>0</sub>=1 s.

Document Type:Article
Title:Dilution of Aircraft Exhaust Plumes at Cruise Altitudes
Authors:
AuthorsInstitution or Email of Authors
Schumann, UlrichUNSPECIFIED
Schlager, H.UNSPECIFIED
Arnold, F.MPI Heidelberg
Baumann, R.UNSPECIFIED
Haschberger, PeterUNSPECIFIED
Klemm, O.IFU Garmisch-Partenkirchen
Date:1998
Journal or Publication Title:Atmospheric Environment
Volume:32
DOI:10.1016/S1352-2310(97)00455-X
Page Range:pp. 3097-3103
Status:Published
Keywords:tropopause region, mixing, dispersion, aircraft emissions, jet, contrail
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:L VU - Air Traffic and Environment (old)
DLR - Research area:Aeronautics
DLR - Program:L VU - Air Traffic and Environment
DLR - Research theme (Project):L - Wake Vortices (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics
Institut für Optoelektronik
Deposited By: elib DLR-Beauftragter
Deposited On:25 Jan 2008
Last Modified:12 Dec 2013 19:59

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