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Velocity Measurement in a Dual-Mode Supersonic Combustor using Particle Image VelocimetryTemporally and spatially-resolved, two-component measurements of velocity in a supersonic hydrogen-air combustor are reported. The combustor had a single unswept ramp fuel injector and operated with an inlet Mach number of 2 and a flow total temperature approaching 1200 K. The experiment simulated the mixing and combustion processes of a dual-mode scramjet operating at a flight Mach number near 5. The velocity measurements were obtained by seeding the fuel with alumina particles and performing Particle Image Velocimetry on the mixing and combustion wake of the ramp injector. To assess the effects of combustion on the fuel air-mixing process, the distribution of time-averaged velocity and relative turbulence intensity was determined for the cases of fuel-air mixing and fuel-air reacting. Relative to the mixing case, the near field core velocity of the reacting fuel jet had a slower streamwise decay. In the far field, downstream of 4 to 6 ramp heights from the ramp base, the heat release of combustion resulted in decreased flow velocity and increased turbulence levels. The reacting measurements were also compared with a computational fluid dynamics solution of the flow field. Numerically predicted velocity magnitudes were higher than that measured and the jet penetration was lower.
Document ID
20030007790
Acquisition Source
Langley Research Center
Document Type
Conference Paper
Authors
Goyne, C. P. (Virginia Univ. Charlottesville, VA United States)
McDaniel, J. C. (Virginia Univ. Charlottesville, VA United States)
Krauss, R. H. (Virginia Univ. Charlottesville, VA United States)
Day, S. W. (Virginia Univ. Charlottesville, VA United States)
Reubush, D. E.
McClinton, C. R.
Reubush, D. E.
Date Acquired
September 7, 2013
Publication Date
January 1, 2001
Subject Category
Fluid Mechanics And Thermodynamics
Report/Patent Number
AIAA Paper 2001-1761
Meeting Information
Meeting: AIAA/NAL-NASDA-ISAS 10th International Space Planes and Hypersonic Systems and Technologies Conference
Location: Kyoto
Country: Japan
Start Date: April 24, 2001
End Date: April 27, 2001
Sponsors: American Inst. of Aeronautics and Astronautics, National Aerospace Lab., Institute of Space and Astronautical Science
Funding Number(s)
CONTRACT_GRANT: NAG1-2085
CONTRACT_GRANT: NAG1-2131
Distribution Limits
Public
Copyright
Public Use Permitted.

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