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Mixture Motion - Its Effect on Pressure Rise in a Combustion Bomb: A New Look at Cyclic Variation
ISSN: 0148-7191, e-ISSN: 2688-3627
Published February 01, 1968 by SAE International in United States
Annotation ability available
Cycle-to-cycle variation of pressure is a common problem in all spark-ignition engines. To examine the suspected influence of mixture-motion on this variation, a study was performed in a constant volume cylindrical bomb in which a jet of propane-air mixture was directed at the initial flame kernel. The rate of pressure rise of the jet-influenced combustion was compared to the rate for combustion in a quiescent mixture. The flame area, obtained using a spark schlieren photographic technique, and the calculated combustion rate were correlated with the pressure rate.
The major results were: the rate of pressure rise increased approximately linearly with mixture jet velocity; and the width of the mixture-jet had an effect on the rate of pressure rise. A jet profile width slightly greather than the spark-gap produced the highest rate of pressure rise.
CitationCole, D. and Mirsky, W., "Mixture Motion - Its Effect on Pressure Rise in a Combustion Bomb: A New Look at Cyclic Variation," SAE Technical Paper 680766, 1968, https://doi.org/10.4271/680766.
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