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Rapid Characterization of I.C. Engine In-Cylinder Flow at Spark: A Synergistic Approach Using Experimental and Numerical Simulations
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Abstract
A new methodology for rapidly characterizing the in-cylinder flow field at spark ignition for internal combustion engines is described in this paper. The process involves the use of 3-D particle tracking velocimetry to measure the flow field at intake valve closing (IVC) in a water analog engine simulation, and the use of CFD to compute the evolution of the measured flow field during the compression stroke, by using the experimental 3-D PTV results at IVC as the initial condition for the calculations.
The technique has been applied to investigate the in-cylinder flow field of a typical 4 valve engine operating in two different modes; one or two intake ports active. The results indicate that in either mode the flow field at IVC is dominated by a different large scale structure: tumble in the case where both intake ports are active and swirl in the case where only one port is active. The results also indicate that these structures evolve differently during the compression stroke. While swirl decays monotonically during the compression stroke, tumble appears to gain in strength during the early stages of the compression before it starts decaying at a faster rate.
In addition, an initial comparison of the results obtained by this hybrid approach with engine combustion data indicates that the burn rate increases with increasing levels of in-cylinder turbulence, which is the expected trend based on combustion entrainment models.
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Trigui, N., Leep, L., and Kent, J., "Rapid Characterization of I.C. Engine In-Cylinder Flow at Spark: A Synergistic Approach Using Experimental and Numerical Simulations," SAE Technical Paper 941934, 1994, https://doi.org/10.4271/941934.Also In
References
- Arcoumanis C. Bae C. S. Hu Z. Flow and combustion in a four-valve, spark-ignition optical engine Paper 940475 SAE 1994
- Glover A. R. Hundleby G. R. Hadded O. An investigation into turbulence in engines using scanning Ida Paper 880379 SAE 1988
- Guezennec Y. G. Brodkey R. S. Trigui N. Kent J. C. Algorithms for fully automatic three-dimensional particle image velocimetry Experiments in Fluids, In press 1994
- Henriot S. Le Coz J. Three dimensional modeling of flow and turbulence in a four-valve spark ignition engine - comparison with ldv measurements Paper 890843 SAE 1989
- Kent J. C. Mikulec A. Rimai L. Adamczyk A. A. Mueller S. R. Stein R. A. Observations on the effects of intake-generated swirl and tumble on combustion duration Paper 892096 SAE 1989
- Reuss D. Adrian R. J. Landreth C. C. French D. T. Fransler T. D. Instantaneous planar measurements of velocity and large-scale vorticity and strain rate in an engine using particle image velocimetry Paper 890616 SAE 1989
- Reuss D. Brasley M. Felton P. G. Landreth C. C. Adrian R. J. Velocity, vorticity, and strain-rate ahead of a flame measured in an engine using particle image velocimetry Paper 900053 SAE 1990
- Trigui N. Kent J. C. Guezennec Y. G. Choi W. C. Characterization of intake-generated flow fields in i.c. engines using 3-d particle tracking velocimetry (3-d ptv) Paper 940279 SAE 1994
- Trigui N. Affes H. Kent J. G. Use of experimentally measured in-cylinder flow field data at ivc as initial conditions to cfd simulations of compression stroke in i.c. engines - a feasibility study Paper 940280 SAE 1994
- Trigui N. Guezennec G. Y. Brodkey R. Kent J. C. Fully-automated three-dimensional particle image velocimetry system applied to engine fluid mechanics research 41 44 Proceedings of the First I. Mech. E. Seminar on Optical Methods and Data Processing in Heat and Fluid Flow City University London April 1992