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Comparison of the Effects of Intake-Generated Swirl and Tumble on Turbulence Characteristics in a 4-Valve Engine
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Abstract
An experimental investigation is carried out on the effect of Swirl and Tumble on turbulence and combustion characteristics in four-valve spark ignition engines. This study is conducted on an optically accessed single cylinder research engine. The in-cylinder motion is varied by means of flow-control baffle located between the intake manifold and the cylinder head. Several baffle sizes and shapes have been designed to induce various in-cylinder flow fields. The equivalent angular speed of the tumble and swirl vortices, occurring inside the cylinder, are determined from Laser Doppler Velocimetry. Comparisons with measurements from a conventional steady flow rig which measures air motion speed with a paddle wheel anemometer are presented and show a good correlation between the two measurement techniques. The turbulence and local velocity in the combustion chamber at ignition are measured and correlated with combustion characteristics obtained from analysis of the combustion in the cylinder.
The influence of tumble and swirl levels on the characteristics of turbulence and combustion is analysed. As the tumble intensity increases, the breakdown of the tumbling motion into turbulence occurs earlier in the compression stroke. For swirl configurations, the location of the center of rotation has a significant impact on the characteristics of turbulence at the spark plug location. Turbulence intensity measured at the spark plug location correlates well with combustion characteristics such as stability, delay angle, burn angle obtained from heat release rate analysis.
* Numbers in parentheses designate references at end of paper.
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Floch, A., Van Frank, J., and Ahmed, A., "Comparison of the Effects of Intake-Generated Swirl and Tumble on Turbulence Characteristics in a 4-Valve Engine," SAE Technical Paper 952457, 1995, https://doi.org/10.4271/952457.Also In
References
- Rönnbäck M. Le W.X. Linna J.-R. “Study of Induction Tumble by Particle Tracking velocimetry in a 4-valve Engine” SAE 912376
- Jie Myoung-Seok Kim Myong-Ho Kim Woo-Tae “The Effect of Tumble Flow on Engine Performance and Flame Propagation” SAE 931946
- Inoue T. Matsushita, Nakanishi K. Okano H. “Toyota Lean Combustion System - The Third Generation System” SAE 930873
- Chulho Y. Taehoon K. Yonggyun Y. Juheon L. Seokhong N. Kyuhoon C. “Development of KMC 2.4 L Lean Burn Engine” SAE 950685
- Stokes J Lake T.H. Christie M.J. Denbratt I “Improving the NOx/Fuel Economy Trade-Off for Gasoline Engines with CCVS Combustion System” SAE 940482
- Liou T.-M. Santavicca D.A. “Cycle Resolved Turbulence Measurements in a ported Engine with and without Swirl” SAE 830419
- Witze P.O. “The Effect of Spark Location on Combustion in a Variable-Swirl Engine” SAE 820044
- Mikulec A. Kent J.C. Tabaczynski R.J. “The Effect of Swirl on Combustion in a Pancake Chamber Spark Ignition Engine: The Case of Constant Inducted Kinetic Energy” SAE 880200
- Hadded O. Denbratt I. “Turbulence Characteristics of Tumbling Air Motion in Four-Valve S.I. Engines and their Correlation with Combustion Parameters” SAE 910478
- Kudou H. Yamamoto H. Lida Y. “A Study About In-Cylinder Flow and Combustion in a 4-valve S.I. Engine” SAE 920574
- Arcoumanis C. Bae C.S. Hu Z. “Flow and Combustion in a Four-Valve, Spark-Ignition Optical Engine” SAE 940475
- Kent J.C. Mikulec A. Rimai L. Adamczik 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 892096
- Endres H. NeuBer H.-J. Wurms R. “Influence of Swirl and Tumble on Economy and Emissions of Multi Valve SI Engines” SAE 920516
- Khalighi B. “Intake-Generated Swirl and Tumble Motions in a 4 Valve Engine with Various Intake Configurations-Flow Visualization and Particle Tracking Velocimetry” SAE 900059
- Khalighi B. Huebler M.S. “A transient water analog of a Dual-Intake-Valve Engine for Intake Flow Visualization and Full-Field velocity Measurements” SAE 880519
- Trigui N. Kent J.C. Guezennec Y Choi W.-C. “Characterization of Intake Generated Fluid Flow Fields in IC Engines Using 3-D Particle Tracking Velocimetry (3-D PTV)” SAE 940279
- Van Franck J. Floch A. “Influence of swirl and tumble motion on combustion stability and heat release” S.I.A congress 1994
- Furuno S. Iguchi S. Oishi K. Inoue T. “The Effects of ‘Inclination Angle of Swirl Axis’ on turbulence Characteristics in a 4-valve Lean-Burn Engine with SCV” SAE 902139
- Omori S. Iwachido K. Motomochi M. Hirako O. “Effect of intake port flow pattern on the in-cylinder tumbling air flow in multi-valve SI engines” SAE 910477
- Witze P. O. Mendes-Lopes J.M.C. “Direct Measurement of the Turbulent Burning Velocity in a Homogeneous-Charge Engine” SAE 861531
- Liou T.-M. Santavicca D.A. “Cycle Resolved LDV Measurements in a Motored IC Engine” ASME Journal of Fluids Engineering 107 232 June 1985
- Rask R.B. “Comparison of window, smoothed-ensemble, and cycle by cycle data reduction techniques for laser Doppler anemometer measurements of in cylinder velocity” ASME Fluid Mechanics of combustion system 11 1981
- Fraser R.A. Bracco F.V. “Cycle-Resolved LDV Integral Length Scale Measurements Investigating Clearance Height Scaling, Isotropy, and Homogeneity in an I.C. Engine” SAE 890615
- Baritaud T “Combustion and Fluid Dynamic Measurements in a spark Ignition Engine: Effects of Thermochemistry and Velocity field; Turbulent Flame Speeds” SAE 892098
- Bracco F.V. “Structure of flames in Premixed-charge IC engines” Combustion Sciences and Technology 58 209 1988
- Le Coz J.F. “Cycle-to-Cycle Correlations between Flow Field and Combustion Initiation in an S.I. Engine” SAE 920517
- Kuwahara K. Watanabe T. Takemura J. Omori S. Kume T. Ando H. “Optimization of In-Cylinder Flow and Mixing for a center-Spark Four-Valve Engine Employing the Concept of Barrel-Stratification” SAE 940986
- Kuwahara K. Kawai T. Ando H. “Influence of flow field structure after the distortion of tumble on Lean-Burn Flame Structure” Proceedings of international Symposium COMODIA 94 1994 89
- Mantel T. “Three Dimensional Study of Flame Kernel Formation Around a Spark Plug” SAE 920587