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Calculation of eddy viscosity in a compressible turbulent boundary layer with mass injection and chemical reactionThe turbulent kinetic energy equation is coupled with boundary layer equations to solve the characteristics of compressible turbulent boundary layers with mass injection and combustion. The Reynolds stress is related to the turbulent kinetic energy using the Prandtl-Wieghardt formulation. When a lean mixture of hydrogen and nitrogen is injected through a porous plate into the subsonic turbulent boundary layer of air flow and ignited by external means, the turbulent kinetic energy increases twice as much as that of noncombusting flow with the same mass injection rate of nitrogen. The magnitudes of eddy viscosity between combusting and noncombusting flows with injection, however, are almost the same due to temperature effects, while the distributions are different. The velocity profiles are significantly affected by combustion. If pure hydrogen as a transpiration coolant is injected into a rocket nozzle boundary layer flow of combustion products, the temperature drops significantly across the boundary layer due to the high heat capacity of hydrogen. At a certain distance from the wall hydrogen reacts with the combustion products, liberating an extensive amount of heat.
Document ID
19740031207
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Omori, S.
(Alabama, University Huntsville, Ala., United States)
Gross, K. W.
(NASA Marshall Space Flight Center Astronautics Laboratory, Huntsville, Ala., United States)
Date Acquired
August 7, 2013
Publication Date
October 1, 1973
Subject Category
Fluid Mechanics
Meeting Information
Meeting: Fall Technical Meeting
Location: Montreal
Country: Canada
Start Date: October 11, 1973
End Date: October 12, 1973
Sponsors: Combustion Institute
Accession Number
74A13957
Distribution Limits
Public
Copyright
Other

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