Electron-beam-induced acoustic-wave enhancement of gaseous combustion
The combustion rate of premixed gases in a closed vessel was increased by injecting a high-current electron beam into the gas mixture within about 20 ms of spark ignition. This effect was observed with the fuels ethylene, methane, ethane, propane, and n-butane. Experimental results provide strong evidence that e-beam excitation of the fundamental longitudinal-acoustic mode of the cylindrical chamber is the mechanism of combustion enhancement. An observable combustion enhancement required that the amplitude of the fluid velocity oscillation in this acoustic mode be greater than or approximately equal to the flame propagation speed and was associated with a wrinkled or cellular flame structure with dimensions on the order of 1/2 cm. These results are in good agreement with values for the threshold acoustic velocity amplitude and dimension of cellular structure predicted for a periodically accelerated flame.
- Research Organization:
- Intense Energy Beam Interaction Laboratory, Nuclear Engineering Department, The University of Michigan, Ann Arbor, Michigan 48109-2104
- OSTI ID:
- 6887440
- Journal Information:
- J. Appl. Phys.; (United States), Vol. 65:2
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
BUTANE
PHYSICAL RADIATION EFFECTS
COMBUSTION
ACOUSTICS
EFFICIENCY
ETHANE
ETHYLENE
METHANE
PROPANE
COMBUSTION PROPERTIES
COMBUSTION WAVES
ELECTRON BEAMS
EXPERIMENTAL DATA
SOUND WAVES
ALKANES
ALKENES
BEAMS
CHEMICAL REACTIONS
DATA
HYDROCARBONS
INFORMATION
LEPTON BEAMS
NUMERICAL DATA
ORGANIC COMPOUNDS
OXIDATION
PARTICLE BEAMS
RADIATION EFFECTS
THERMOCHEMICAL PROCESSES
360605* - Materials- Radiation Effects