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Studies of aircraft wake chemistry and dispersionUse of aerospace technology to study aircraft wakes is reviewed. It is shown how aerospace vehicles can be used to provide data for increased understanding of the atmosphere and of aircraft exhaust trails where knowledge is inadequate to evaluate fully the potential impact of the engine emissions. Models of aircraft near-field exhaust wakes are characterized by jet, vortex, and dispersion regimes. Wake growth in the jet regime is self-determined and rapid, whereas further spreading is inhibited in the vortex regime because of circulating vortex motion. Wake diffusion in the dispersion regime is initially influenced by aircraft induced turbulence but is dominated later by small-scale atmospheric turbulence. Computed fluid mechanical results show the importance of effects such as wake buoyancy, wind shear, turbulence, and traffic corridor exhaust buildup on dispersion of the wake. In the jet regime the exhaust characteristics and thermochemistry serve to illustrate initial chemical changes involving potential pollutant species.
Document ID
19740050560
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Poppoff, I. G.
Farlow, N. H.
(NASA Ames Research Center Moffett Field, Calif., United States)
Anderson, L. B.
(Lockheed Research Laboratories Palo Alto, Calif., United States)
Date Acquired
August 7, 2013
Publication Date
February 1, 1974
Publication Information
Publication: Acta Astronautica
Volume: 1
Subject Category
Chemistry
Accession Number
74A33310
Distribution Limits
Public
Copyright
Other

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