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Opposed jet burner studies of hydrogen combustion with pure and N2, NO-contaminated airA counterflow diffusion flame formed by an argon-bathed tubular-opposed jet burner (OJB) was used to determine the 'blowoff' and 'restore' combustion characteristics for jets of various H2/N2 mixtures and for jets of air contaminated by NO (which normally occurs in high-enthalpy airflows supplied to hypersonic test facilities for scramjet combustors). Substantial divergence of 'blowoff' and 'restore' limits occurred as H2 mass flux, M(H)2, increased, the H2 jet became richer, and the M(air)/M(H2 + N2) ratio increased from 1 to 3 (molar H2/O2 from 1 to 16). Both OJB limits were sensitive to reactant composition. One to six percent NO in air led to significant N2-corrected decreases in the M(H2) values for 'blowoff' (2-8 percent) and 'restore' (6-12 percent) for mole fractions of H2 ranging from 0.5 to 0.95. However, when H2/O2 was held constant, all N2-corrected changes in M(H2) were negligible.
Document ID
19870035135
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Guerra, Rosemary
(George Washington University Hampton, VA, United States)
Pellett, Gerald L.
(George Washington Univ. Hampton, VA, United States)
Northam, G. Burton
(NASA Langley Research Center Hampton, VA, United States)
Wilson, Lloyd G.
(PRC Kentron, Inc. Hampton, VA, United States)
Date Acquired
August 13, 2013
Publication Date
January 1, 1987
Subject Category
Propellants And Fuels
Report/Patent Number
AIAA PAPER 87-0090
Accession Number
87A22409
Distribution Limits
Public
Copyright
Other

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