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Species measurements in a hypersonic, hydrogen-air, combustion wake

Author
Stalker, R. J.
Published
JAN 1, 1995.
Physical Description
1 electronic document
Additional Creators
Skinner, K. A.
Online Version

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Summary
A continuously sampling, time-of-flight mass spectrometer has been used to measure relative species concentrations in a two-dimensional, hydrogen-air combustion wake at mainstream Mach numbers exceeding 5. The experiments, which were conducted in a free piston shock tunnel, yielded distributions of hydrogen, oxygen, nitrogen, water and nitric oxide at stagnation enthalpies ranging from 5.6 MJ kg(exp -1) to 1.2 MJ kg(exp -1) and at a distance of approximately 100 times the thickness of the initial hydrogen jet. The amount of hydrogen that was mixed in stoichiometric proportions was approximately independent of the stagnation enthalpy, in spite of the fact that the proportion of hydrogen in the wake increased with stagnation enthalpy. Roughly 50 percent of the mixed hydrogen underwent combustion at the highest enthalpy. The proportion of hydrogen reacting to water could be approximately predicted using reaction rates based on mainstream temperatures.
Other Subject(s)
Collection
NASA Technical Reports Server (NTRS) Collection.
Note
Document ID: 19960001681.
Accession ID: 96N11689.
Shock Tunnel Studies of Scramjet Phenomena 1994; 19 p.
Terms of Use and Reproduction
No Copyright.
View MARC record | catkey: 15652490