Mixture Motion - Its Effect on Pressure Rise in a Combustion Bomb: A New Look at Cyclic Variation 680766
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.
Citation: Cole, 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. Download Citation
Author(s):
David E. Cole, William Mirsky
Affiliated:
University of Michigan
Pages: 15
Event:
National Fuels and Lubricants and Transportation Meetings
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
SAE 1968 Transactions-V77-A
Related Topics:
Combustion and combustion processes
Spark ignition engines
Pressure
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