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Computation of wake/exhaust mixing downstream of advanced transport aircraftThe mixing of engine exhaust with the vortical wake of high speed aircraft operating in the stratosphere can play an important role in the formation of chemical products that deplete atmospheric ozone. An accurate analysis of this type of interaction is therefore necessary as a part of the assessment of the impact of proposed High Speed Civil Transport (HSCT) designs on atmospheric chemistry. This paper describes modifications to the parabolic Navier-Stokes flow field analysis in the UNIWAKE unified aircraft wake model to accommodate the computation of wake/exhaust mixing and the simulation of reacting flow. The present implementation uses a passive chemistry model in which the reacting species are convected and diffused by the fluid dynamic solution but in which the evolution of the species does not affect the flow field. The resulting analysis, UNIWAKE/PCHEM (Passive CHEMistry) has been applied to the analysis of wake/exhaust flows downstream of representative HSCT configurations. The major elements of the flow field model are described, as are the results of sample calculations illustrating the behavior of the thermal exhaust plume and the production of species important to the modeling of condensation in the wake. Appropriate steps for further development of the UNIWAKE/PCHEM model are also outlined.
Document ID
Document Type
Conference Paper
Quackenbush, Todd R.
(NASA Langley Research Center Hampton, VA, United States)
Teske, Milton E.
(NASA Langley Research Center Hampton, VA, United States)
Bilanin, Alan J.
(Continuum Dynamics, Inc. Princeton, NJ, United States)
Date Acquired
August 16, 2013
Publication Date
July 1, 1993
Subject Category
Environment Pollution
Report/Patent Number
AIAA PAPER 93-2944
Meeting Information
AIAA, Fluid Dynamics Conference(Orlando, FL)
Accession Number
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