Prediction of spark kernel development in constant volume combustion
Combustion initiation is studied in atmospheric pressure propane-air mixtures in a constant volume bomb with a high speed (10,000 fps) laser schlieren system. The spark current and voltage waveforms are simultaneously recorded for later model input. A phenomenological model for early flame kernel development is presented which accounts for the initial, breakdown generated, spark kernel and its subsequent growth. The kernel growth is initially controlled by the breakdown process and the subsequent electrical power input. A new, spark power induced, mass entrainment term is shown to model this initially rapid volume increase adequately while later growth is mainly dominated by diffusion. Results and model comparisons are presented for the effects of power input, spark energy, and equivalence ratio.
- Research Organization:
- Tech. Res. Inst., Hyundai Precision and Industry Co. Ltd., Seoul
- OSTI ID:
- 6217161
- Journal Information:
- Combust. Flame; (United States), Journal Name: Combust. Flame; (United States) Vol. 69:3; ISSN CBFMA
- Country of Publication:
- United States
- Language:
- English
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AIR
ALKANES
ATMOSPHERIC PRESSURE
BREAKDOWN
CHEMICAL REACTIONS
COMBUSTION
DIFFUSION
ELECTRIC DISCHARGES
ELECTRIC POTENTIAL
ELECTRIC SPARKS
ENGINES
FLUIDS
FUEL ECONOMY
GASES
HEAT ENGINES
HYDROCARBONS
IGNITION QUALITY
IGNITION SYSTEMS
INTERNAL COMBUSTION ENGINES
LASERS
MATHEMATICAL MODELS
ORGANIC COMPOUNDS
OXIDATION
PHOTOGRAPHY
POWER INPUT
PROPANE
SCHLIEREN METHOD
SPARK IGNITION ENGINES
THERMOCHEMICAL PROCESSES
WAVE FORMS