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- W2325647392 abstract "*† ‡ This experiment is developed to determine the upper and lower flammability limits of oxygen and hydrogen in confined spaces. The test apparatus is designed to simulate the volume around the shaft that connects the turbine and turbo-pump of a liquid rocket engine. This space is typically purged with helium to reduce the risk of fire or explosion. Various concentrations of hydrogen and oxygen are introduced into the test vessel until the pressure in the vessel reaches atmospheric pressure (14.7 psi). The mixture is premixed and quiescent. The pressure inside the vessel is continuously monitored and a spark is then applied to induce combustion. The flammability limits are reported as a function of the spacing between the shaft and the housing. The literature values of the flammability limits for hydrogen and oxygen are 4.1% volume of hydrogen for the lower limit, LFL, and 94% volume of hydrogen for the upper limit, UFL. The flammability limits for a gap size of 0.21 inches was found to be 8.1% volume of hydrogen for the LFL and 90.6% volume of hydrogen for the UFL. The flammability limits for the apparatus without an inner cylinder was found to be 5.8% volume of hydrogen for the LFL and the 91.2% volume of hydrogen for the UFL. There is a difference in the experimental values compared to the literature values due to the change of geometry to the test vessel. Heat is lost into the walls of the apparatus causing the flame to be quenched." @default.
- W2325647392 created "2016-06-24" @default.
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- W2325647392 date "2004-06-26" @default.
- W2325647392 modified "2023-09-26" @default.
- W2325647392 title "Flammability Limits of Hydrogen and Oxygen in Confined Spaces" @default.
- W2325647392 cites W2034838112 @default.
- W2325647392 doi "https://doi.org/10.2514/6.2004-3371" @default.
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