This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
The Effects of Intake-Flow Configuration on the Heat-Release and Heat-Transfer Characteristics of a Single-Cylinder Four-Valve S.I. Engine
Annotation ability available
Sector:
Language:
English
Abstract
Local transient heat-flux measurements and heat-release analyses were employed to investigate the effects of introducing swirl or tumble fluid motion during the intake stroke on the combustion and heat-transfer characteristics of a single-cylinder spark-ignition engine. In general, swirl or tumble motion decreased the period of flame development and increased the peak rate of heat release, but, surprisingly, it increased the period of combustion. The latter increase was the result of comparatively low rates of fuel burning during the last stages of combustion. Swirl or tumble motion also significantly increased the local heat flux on the cylinder head. The highest peak heat flux was obtained for tumble motion. The observed increase in heat flux is attributed to the resultant increase in the mean velocity and in the turbulent intensity of the gases in the combustion chamber, which, in turn, augment the rate of heat release and the effective convective heat-transfer coefficient. Finally, the local heat-flux measurements were compared with corresponding area-averaged heat fluxes computed using a suitably scaled empirical heat transfer correlation proposed by Woschni. The peak value of the computed area-averaged heat flux was in fair agreement with the corresponding values measured in the central region of the combustion chamber. On the other hand, the crank angle at which the computed peak heat flux occurred was in good agreement with the corresponding result measured at the outer location in the periphery of the combustion chamber.
Recommended Content
Authors
Topic
Citation
Alkidas, A. and Suh, I., "The Effects of Intake-Flow Configuration on the Heat-Release and Heat-Transfer Characteristics of a Single-Cylinder Four-Valve S.I. Engine," SAE Technical Paper 910296, 1991, https://doi.org/10.4271/910296.Also In
References
- Nagayama, I. Araki, Y. Iioka, Y. “Effects of Swirl and Squish on S.I. Engine Combustion and Emission,” SAE Transactions 86 Paper 770217 990 999 1977
- Inoue, T. Nakanishi, K. Noguchi, H. Iguchi, S. “The Role of Swirl and Squish in Combustion of the SI Engine,” VDI-Berichte 370 181 188 1980
- Davis, G. C. Mikulec, A. Kent, J. C. Tabaczynski, R. J. “Modeling the Effect of Swirl on Turbulence Intensity and Burn Rate in S.I. Engines and Comparison with Experiment,” SAE Transactions 95 Paper 860325 2.427 2.434 1986
- Hamamoto, Y. Tomita, E. Tanaka, Y. Katayama, T. Tamura, Y. “The Effect of Swirl on Spark-Ignition Engine Combustion,” JSME International Journal 30 270 1995 2002 1987
- Kent, J. C. Haghgooie, M. Mikulec, A. Davis, G. C. Tabaczynski, R. J. “Effects of Intake Port Design and Valve Lift on In-Cylinder Flow and Burnrate,” SAE Transactions 96 Paper 872153 7.975 7.987 1987
- Kumar, S. Ahary, M. Lambe, S. M. Watson, H. C. “Flame Propagation in a High-Speed Variable Swirl Spark Ignition Engine,” Combustion in Engines - Technology and Applications IMechE Paper C61/88 43 50 1988
- Kent. J. C. Mikulec, M. Rimai, L. Adamczyk, A. A. Mueller, S. R. Stein, R. A. Warren, C. C. “Observations on the Effects of Intake-Generated Swirl and Tumble on Combustion Duration,” SAE Paper 892096 1989
- Kyriakides, S. C. Glover, A. R. “A Study of the Correlation Between In-Cylinder Air Motion and Combustion in Gasoline Engines,” Proc. Instn. Mech. Engrs. 203 185 192 1989
- Gilaber, P. Pinchon, P. “Measurements and Multidimensional Modeling of Gas-Wall Heat Transfer in a S.I. Engine,” SAE Paper 880516 1988
- Alkidas, A. C. Puzinauskas, P. V. Peterson, R. C. “Combustion and Heat-Transfer Studies in a Spark-Ignited Multivalve Optical Engine,” SAE Paper 900353 1990
- Bowditch, F. W. “A New Tool for Combustion Research - A Quartz Piston Engine,” SAE Transactions 69 17 23 1961
- Alkidas, A. C. “Heat Transfer Characteristics of a Spark-Ignition Engine,” ASME Journal of Heat Transfer 102 189 193 1980
- Alkidas, A. C. Myers, J. P. “Transient Heat-Flux Measurements in the Combustion Chamber of a Spark-Ignition Engine,” ASME Journal of Heat Transfer 104 62 67 1982
- Gatowski, J. A. Smith, M. K. Alkidas, A. C. “An Experimental Investigation of Surface Thermometry and Heat Flux,” Experimental Thermal and Fluid Science 2 280 292 1989
- Woschni, G. J. “Die Berechnung der Wandverluste und der Thermischen Belastung der Bauteile von Dieselmotoren,” Motortechnischen Zeitschrift 30 12 491 499 1970
- Borman, G. Nishiwaki, K. “Internal-Combustion Engine Heat Transfer,” Prog. Energy Combust. Sci. 13 1 46 1987
- Gosman, A. D. Tsui, Y. Y. Vafidis, C. “Flow in a Model Engine with a Shrouded Valve - A Combined Experimental and Computational Study,” SAE Paper 850498 1985
- Haworth, D. C. El Tahry, S. H. Huebler, M. S. Chang, S. “Multidimensional Port-and-Cylinder Flow Calculations for Two- and Four-Valve-Per-Cylinder Engines: Influence of Intake Configuration on Flow Structure,” SAE Paper 900257
- Arcoumanils, C. Hu, Z. Vafidis, C. Whitelaw, J. H. “Tumbling Motion: A Mechanism for Turbulence Enhancement in Spark-Ignition Engines,” SAE Paper 900060 1990
- Kalghatgi, G. T. “Spark Ignition, Early Flame Development and Cyclic Variation in I. C. Engines,” SAE Paper 870163 1987
- Keck, J. C. Heywood, J. C. Noske, G. “Early Flame Development and Burning Rates in Spark Ignition Engines and Their Cyclic Variability,” SAE Paper 870164 1987
- Bates, S. C. “Flame Imaging Studies of Cycle-by-Cycle Combustion Variation in a S. I. Four-Stroke Engine,” SAE Paper 892086 1989
- Nakamura, A. Ishii, K. Sasaki, T. “Application of Image Converter Camera to Measure Flame Propagation in S.I. Engine,” SAE Paper 890322 1989
- Henriot, S. LeCoz, J. F. Pinchon, P. “Three Dimensional Modelling of Flow and Turbulence in a Four-Valve Spark Ignition Engine - Comparison with LDV Measurements,” SAE Paper 890843 1989