Time dependent theory of spark ignition

Conference · Thu Jan 01 04:00:00 EST 1981 · Symp. (Int.) Combust., (Proc.); (United States)

OSTI ID:5050628

Adelman, H G

A new theory of spark ignition has been formulated which includes for the first time the temporal dependence of the spark energy input. This theory is based on the observation made here that for ignition the spark kernel or hot bubble of gas created by the spark must grow to a critical size before its expansion velocity falls below a critical rate. A model of spark kernel growth has been developed which relates the time varying energy input to the kernel expansion in the high pressure region behind a spark induced strong shock wave or in an ambient pressure environment behind a weak shock. Comparisons of observed spark kernel growth patterns and ignition energies with predictions made using this theory showed very good agreement for a wide range of pressures, air-fuel ratios and spark powers and durations for both stagnant and flowing gases. 38 refs.

• Research Organization: Univ of Santa Clara, Calif
• OSTI ID: 5050628
• Report Number(s): CONF-800809-
• Conference Information: Journal Name: Symp. (Int.) Combust., (Proc.); (United States)
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330101* -- Internal Combustion Engines-- Spark-Ignition
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400800 -- Combustion
Pyrolysis
& High-Temperature Chemistry
CHEMICAL REACTION KINETICS
COMBUSTION KINETICS
ENGINES
FLUID FLOW
HEAT ENGINES
IGNITION
INTERNAL COMBUSTION ENGINES
KINETICS
REACTION KINETICS
SHOCK WAVES
SIMULATION
SPARK IGNITION ENGINES
TIME DEPENDENCE
TURBULENT FLOW