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.
Issue Section:
Internal Combustion Engines
Keywords:
combustion,
ignition,
flames,
fuel,
pressure,
internal combustion engines,
schlieren systems
1.
Sinnamon
, J. F.
, Lancaster
, D. R.
, and Steiner
, J. C.
, 1980
, “An Experimental and Analytical Study of Engine Fuel Spray Trajectories
,” SAE Trans.
, 89
, Sec. 1, pp. 765
–785
, Paper No. 800135.2.
Solomon
, A. S. P.
, 1986
, “A Photographic Study of Fuel Spray Ignition in a Rapid Compression Machine
,” SAE Trans.
, 95
, Sec. 1, pp. 406
–1
.3.
Zhu
, Y.
, Hu
, G.
, Wei
, X.
, and Yu
, J.
, 1988
, “A Study on a New Combustion System for D.I. Diesel-CSCS System
,” SAE Trans.
, 97
, Sec. 6, pp. 768
–6
.4.
Namazian
, M.
, Hansen
, S.
, Lyford-Pike
, E.
, Sanchez-Barsse
, J.
, Heywood
, J. B.
, and Rife
, J.
, 1980
, “Schlieren Visualization of the Flow and Density Fields in the Cylinder of a Spark-Ignition Engine
,” SAE Trans.
, 89
, Sec. 1, pp. 276
–303
, Paper No. 800044.5.
Namazian
, M.
, and Heywood
, J. B.
, 1982
, “Flow in the Piston-Cylinder-Ring Crevices of a Spark-Ignition Engine: Effect on Hydrocarbon Emissions, Efficiency and Power
,” SAE Trans.
, 91
, Sec. 1, pp. 261
–288
, Paper No. 20088.6.
Heywood
, J. B.
, and Vilchis
, F. R.
, 1984
, “Comparison of Flame Development in a Spark-Ignition Engine Fueled With Propane and Hydrogen
,” Combust. Sci. Technol.
, 38
(5
), pp. 313
–324
.7.
Edwards, C. F., Stewart, H. E., and Oppenheim, A. K., 1985, “A Photographic Study of Plasma Ignition Systems,” SAE Paper No. 850077.
8.
Weaver, C. E., and Santavicca, D. A., 1992, “Correlation of Cycle-Resolved Flame Kernel Growth and Cylinder Pressure in an Optically-Accessible Engine,” SAE Paper No. 922171.
9.
Fujikawa
, T.
, Ozasa
, T.
, and Kozuka
, K.
, 1988
, “Development of Transparent Cylinder Engines for Schlieren Observation
,” SAE Trans.
, 97
, Sec. 6, pp. 1714
–6
.10.
Fujikawa
, T.
, Kataoka
, M.
, and Katsumi
, N.
, 1994
, “Schlieren Observation of In-Cylinder Processes With a Transparent Collimating Cylinder
,” Trans. Jpn. Soc. Mech. Eng., Ser. B
, 60
(580
), pp. 4309
–4315
(in Japanese).11.
Tabaczynski
, R. J.
, Hoult
, D. P.
, and Keck
, J. C.
, 1970
, “High Reynolds Number Flow in a Moving Corner
,” J. Fluid Mech.
, 42
, Part 2, pp. 249
–255
.12.
Tabaczynski
, R. J.
, Heywood
, J. B.
, and Keck
, J. C.
, 1972
, “Time-Resolved Measurements of Hydrocarbon Mass Flowrate in the Exhaust of a Spark-Ignition Engine
,” SAE Trans.
, 81
, Sec. 1, pp. 379
–391
, Paper No. 720112.13.
Okubo
, Y.
, Otsuka
, M.
, Kato
, J.
, Kozuka
, K.
, and Sugiyama
, K.
, 1986
, “The Back Scattered LDV Measurements of Swirl Flow in an Internal Combustion Engine
,” Trans. Jpn. Soc. Mech. Eng., Ser. B
, 52
(480
), pp. 3121
–3126
(in Japanese).14.
Witze
, P. O.
, 1982
, “The Effect of Spark Location on Combustion in a Variable-Swirl Engine
,” SAE Trans.
, 91
, Sec. 1, pp. 165
–175
, Paper No. 820044.15.
Gatowski
, J. A.
, Heywood
, J. B.
, and Deleplace
, C.
, 1984
, “Flame Photographs in a Spark-Ignition Engine
,” Combust. Flame
, 56
(1
), pp. 71
–81
.16.
Heywood, J. B., 1989, Internal Combustion Engine Fundamentals, McGraw-Hill, New York, pp. 360–402.
17.
Tabaczynski
, R. J.
, Ferguson
, C. R.
, and Radharkrishnan
, K.
, 1977
, “A Turbulent Entrainment Model for Spark-Ignition Engine Combustion
,” SAE Trans.
, 86
, Sec. 3, pp. 2414
–2433
, Paper No. 770647.18.
Hires
, S. D.
, Tabaczynski
, R. J.
, and Novak
, J. M.
, 1978
, “The Prediction of Ignition Delay and Combustion Intervals for a Homogeneous Charge, Spark Ignition Engine
,” SAE Trans.
, 87
, Sec. 2, pp. 1053
–1067
, Paper No. 780232.19.
Heywood, J. B., 1989, Internal Combustion Engine Fundamentals, McGraw-Hill New York, pp. 376–383.
20.
Chase, N. W., Jr., Davies, C. A., Downey, J. R., Jr., Frurip, D. J., McDonald, R. A., and Syverud, A. N., 1985, “Journal of Physical and Chemical Reference Data,” JANAF Thermochemical Tables, 3rd Ed., 14, the American Chemical Society and the American Institute of Physics.
21.
Woschni
, G.
, 1967
, “A Universally Applicable Equation for the Instantaneous Heat Transfer Coefficient in the Internal Combustion Engine
,” SAE Trans.
, 76
, Sec. 4, pp. 3065
–3083
, Paper No. 670931.22.
Kozuka
, K.
, Saito
, A.
, Otsuka
, M.
, and Kawamura
, K.
, 1981
, “Television System for Viewing Engine Combustion Processes and the Image Analysis
,” SAE Trans.
, 90
, Sec. 3, pp. 2299
–2309
, Paper No. 810753.Copyright © 2003
by ASME
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