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- W2316864896 abstract "An original fuel injector-igniter design concept with the integrated capabilities of regenerative fuel preheating, atomization, penetration, mixing, ignition, and flameholding was built and tested in the Virginia Tech unheated supersonic wind tunnel. Experimental results indicate that the integrated atomizer-igniter provided good penetration, effective atomization, and robust ignition of kerosene without the use of physical flow obstructions. Fuel injection in the direction opposite to the main flow improved penetration and was accompanied by significant heat release, as opposed to fuel injection in the direction of the main flow. Results indicate better penetration than previously-tested single-hole injectors of similar geometry and orientation. The resulting supersonic combustion produced a bluish- green flame extending downstream, with flame luminosity and location dependent on fuel injection method (single- or two-phase). Downstream total temperature measurements were made with the conclusion that rapid mixing of cold wind tunnel air and hot combustion gases substantially reduced the overall mixture temperatures measured downstream. Temperature measurements indicated that single-phase (liquid) injection resulted in better performance above the tunnel floor, while two-phase (liquid/gas) injection was superior near the floor. The plasma igniter alone, an extremely high-temperature energy source, caused little temperature rise downstream, indicating that combustion was the source of the measured heat release. Chemiluminescence measurements were made by filtered photography and UV-visible spectroscopy. Key indicators such as CH, OH, and C2 were found to be present in the combustion region. The results were compared with similar measurements taken with torch-only operation, and spectral differences strongly suggested chemical reactivity. The presence of atomic hydrogen increased dramatically upon injection and combustion of fuel. Torch-only operation and torch operation with water injection were used for comparison and careful assessment of observed combustion throughout the experimental research program." @default.
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- W2316864896 date "2006-06-15" @default.
- W2316864896 modified "2023-10-18" @default.
- W2316864896 title "Plasma Torch Atomizer-Igniter for Supersonic Combustion of Liquid Hydrocarbon Fuels" @default.
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- W2316864896 doi "https://doi.org/10.2514/6.2006-7970" @default.
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