Effect of silane concentration on the supersonic combustion of a silane/methane mixture
A series of direct connect combustor tests was conducted to determine the effect of silane concentration on the supersonic combustion characteristics of silane/methane mixtures. Shock tube ignition delay data indicated more than an order of magnitude reduction in ignition delay times for both 10 and 20 percent silane/methane mixtures as compared to methane. The ignition delay time of the 10 percent mixture was only a factor of 2.3 greater than that of the 20 percent mixture. Supersonic combustion tests were conducted with the fuel injected into a model scramjet combustor. The combustor was mounted at the exit of a Mach 2 nozzle and a hydrogen fired heater was used to provide a variation in test gas total temperature. Tests using the 20 percent silane/methane mixture indicated considerable combustion enhancement when compared to methane alone. This mixture had an autoignition total temperature of 1650 R. The addition of 20 percent silane to methane resulted in a pyrophoric fuel with good supersonic combustion performance. Reducing the silane concentration below this level, however, yielded a less pyrophoric fuel that exhibited poor supersonic combustion performance.
- OSTI ID:
- 5940040
- Report Number(s):
- CONF-8606184-
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
10 SYNTHETIC FUELS
ALKANES
CHEMICAL REACTION KINETICS
COMBUSTION CONTROL
COMBUSTION KINETICS
COMBUSTION PROPERTIES
COMBUSTORS
CONTROL
ENGINES
FLUID FLOW
FUEL INJECTION SYSTEMS
FUEL SYSTEMS
HEAT ENGINES
HYDRIDES
HYDROCARBONS
HYDROGEN COMPOUNDS
IGNITION
INTERNAL COMBUSTION ENGINES
KINETICS
METHANE
ORGANIC COMPOUNDS
ORGANIC SILICON COMPOUNDS
QUANTITY RATIO
RAMJET ENGINES
REACTION KINETICS
SCALE MODELS
SILANES
SILICON COMPOUNDS
STRUCTURAL MODELS
SUPERSONIC FLOW