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- W2325926857 abstract "The effects of injection behind a pylon upstream of a supersonic combustion chamber were evaluated for liquid JP-10 and gaseous ethylene. A generic, rearward-facing, rectangular step was used as the primary flameholding mechanism. A pilot-hydrogen flame injected from the base of the step provided ign.ition. The fuel was injected from a 1.5-mm diameter wall orifice behind a thin triangular cross section pylon placed in the isolator at IO step heights upstream of the step. The role of the pylon is to facilitate the penetration and the spreading of the liquid jet. Tests were performed under connected -pipe conditions in a Mach 1.6 airflow channel and air stagnation temperatures to 900 K, corresponding to the beginning of the hypersonic flight regime. The hydrogen, ethylene and JP-10 flow rates were modulated during the tests and wall pressures and temperatures were measured along the duct and in the recirculation region. Shadowgraph imaging indicated the effect of injection on the isolator shock train and the combustion chamber mixing. Stable combustion without upstream flashback has been observed with isolator JP-10 equivalence ratios to 0.5. Y Transverse location parallel’ cm to contoured sides of nozzle Z Transverse location cm perpendicular to contoured" @default.
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- W2325926857 date "1999-08-22" @default.
- W2325926857 modified "2023-09-26" @default.
- W2325926857 title "Effects of fuel pre-injection on mixing in a Mach 1.6 airflow" @default.
- W2325926857 cites W1984518433 @default.
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- W2325926857 doi "https://doi.org/10.2514/6.1999-4918" @default.
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