Combustion of Lean Mixtures under Simulated Internal Combustion Engine Conditions

摘要

An experimental study is made of fuel lean combustible gases inside a square cross-section enclosure fitted with a reciprocating piston. The piston is pneumatically driven and simulates the compression-expansion phase of internal combustion engine operation. Intake and exhaust valving is not included. Two borosilicate glass windows provide full optical access to the enclosure. A line igniter produces an approximately two-dimensional flame front. Flame location and shape are obtained from high speed schlieren and shadowgraph movies. Pressure measurements and piston location records are simultaneously acquired. Mass burning rate is calculated from flame location, piston location and pressure information. The experiments concentrate on lean fuel/air mixture behavior. Situations investigated are compression followed by combustion, and compression-expansion-combustion. (ERA citation 10:027980)