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Simultaneous raman-rayleigh-lif measurements and numerical modeling results of a lifted h2/n2 turbulent jet flame in a vitiated coflow
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Karpetis, A. N. Cabra, R. Barlow, R. S. Chen, J. Y. Dibble, R. W. Hamano, Y. |
| Copyright Year | 2002 |
| Description | An experimental and numerical investigation is presented of a H2/N2 turbulent jet flame burner that has a novel vitiated coflow. The vitiated coflow emulates the recirculation region of most combustors, such as gas turbines or furnaces. Additionally, since the vitiated gases are coflowing, the burner allows for exploration of recirculation chemistry without the corresponding fluid mechanics of recirculation. Thus the vitiated coflow burner design facilitates the development of chemical kinetic combustion models without the added complexity of recirculation fluid mechanics. Scalar measurements are reported for a turbulent jet flame of H2/N2 in a coflow of combustion products from a lean ((empty set) = 0.25) H2/Air flame. The combination of laser-induced fluorescence, Rayleigh scattering, and Raman scattering is used to obtain simultaneous measurements of the temperature, major species, as well as OH and NO. Laminar flame calculation with equal diffusivity do agree when the premixing and preheating that occurs prior to flame stabilization is accounted for in the boundary conditions. Also presented is an exploratory pdf model that predicts the flame's axial profiles fairly well, but does not accurately predict the lift-off height. |
| File Size | 1298377 |
| Page Count | 20 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20030014613 |
| Archival Resource Key | ark:/13960/t2g78bh00 |
| Language | English |
| Publisher Date | 2002-12-01 |
| Access Restriction | Open |
| Subject Keyword | Aircraft Propulsion And Power Raman Spectra Rayleigh Scattering Jet Flow Hydrogen Laser Induced Fluorescence Combustion Products Burners Nitrogen Fuel Sprays Liquid Fuels Temperature Measurement Combustion Physics Flames Numerical Analysis Laminar Flow Methyl Alcohol Reaction Kinetics Mathematical Models Combustion Chambers Turbulent Jets Circulation Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
