The schlieren photographs of in-cylinder processes in a spark-ignited premixed charge gasoline engine were observed via a transparent collimating cylinder and were presented in comparison with a pressure analysis. The schlieren photographs of the spark, the initial flame and the unburned gas ejection from the piston crevice, which is unable to be observed by direct photography, were clearly taken. It shows that the small difference in the initial combustion process among cycles is intensified by the movement of the piston during the expansion stroke. Finally, this difference appears as the cycle by cycle variation in the pressure and the rate of heat release. The observed flame size increased faster and was larger than the burned gas estimated from the pressure. The difference between them is large enough and can not be explained without considering the mixing of burned and unburned gases inside the flame front.
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January 2003
Technical Papers
Schlieren Observation of Spark-Ignited Premixed Charge Combustion Phenomena Using a Transparent Collimating Cylinder Engine
K. Kozuka, Senior Researcher,
K. Kozuka, Senior Researcher
Toyota Central R&D Labs, Inc., Nagakute-cho, Aichi-ken 480-1192 Japan
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T. Ozasa, Senior Researcher,
T. Ozasa, Senior Researcher
Toyota Central R&D Labs, Inc., Nagakute-cho, Aichi-ken 480-1192 Japan
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T. Fujikawa, Senior Researcher,
T. Fujikawa, Senior Researcher
Toyota Central R&D Labs, Inc., Nagakute-cho, Aichi-ken 480-1192 Japan
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A. Saito, Fellow
A. Saito, Fellow
Toyota Central R&D Labs, Inc., Nagakute-cho, Aichi-ken 480-1192 Japan
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K. Kozuka, Senior Researcher
Toyota Central R&D Labs, Inc., Nagakute-cho, Aichi-ken 480-1192 Japan
T. Ozasa, Senior Researcher
Toyota Central R&D Labs, Inc., Nagakute-cho, Aichi-ken 480-1192 Japan
T. Fujikawa, Senior Researcher
Toyota Central R&D Labs, Inc., Nagakute-cho, Aichi-ken 480-1192 Japan
A. Saito, Fellow
Toyota Central R&D Labs, Inc., Nagakute-cho, Aichi-ken 480-1192 Japan
Contributed by the Internal Combustion Engine Division of THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS for publication in the ASME JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Manuscript received by the ICE Division, Dec. 2000; final revision received by the ASME Headquarters, Feb. 2002. Editor: D. N. Assanis.
J. Eng. Gas Turbines Power. Jan 2003, 125(1): 336-343 (8 pages)
Published Online: December 27, 2002
Article history
Received:
December 1, 2000
Revised:
February 1, 2002
Online:
December 27, 2002
Citation
Kozuka, K., Ozasa, T., Fujikawa, T., and Saito, A. (December 27, 2002). "Schlieren Observation of Spark-Ignited Premixed Charge Combustion Phenomena Using a Transparent Collimating Cylinder Engine ." ASME. J. Eng. Gas Turbines Power. January 2003; 125(1): 336–343. https://doi.org/10.1115/1.1496774
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