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Influence of Inlet Flows on the Flow Field in an Engine
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English
Abstract
Air velocities at several points near the spark plug location were measured using a laser Doppler anemometer (LDA) in a motoring internal combustion engine. This engine was equipped with three intake configurations: a standard valve in a standard port, a standard valve in a helical (swirl) port, and a shrouded valve in a standard port. Both ensemble-averaged and cycle-resolved mean velocities were determined; this allows comparison of rms velocity fluctuation, cycle-resolved turbulence, and cycle-by-cycle variations in mean velocity. Frequency domain analysis of these components was also carried out. The main conclusion of this experimental study was that starting from a very low swirl situation (standard valve case), addition of a moderate amount of swirl (swirl port case) goes a long way towards improving cycle repeatability and increasing cycle-resolved turbulence. Increasing swirl even further (shrouded valve case) does not produce further dramatic improvements.
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Citation
Saxena, V. and Rask, R., "Influence of Inlet Flows on the Flow Field in an Engine," SAE Technical Paper 870369, 1987, https://doi.org/10.4271/870369.Also In
SAE 1987 Transactions: Reciprocating Engines--Spark Ignition and Diesel
Number: V96-4; Published: 1988-09-01
Number: V96-4; Published: 1988-09-01
References
- Rask R.B. “Laser Doppler Anemometer Measurements in an Internal Combustion Engine,” SAE paper 790094 1979
- Rask R.B. Saxena V. “Influence of geometry on flow in the combustion chamber of a Direct Injection Diesel Engine,” INTERNATIONAL SYMPOSIUM ON FLOWS IN INTERNAL COMBUSTION ENGINES-III FED 28 19 Uzkan T. Tiederman W.G. Novak J.M. ASME New York 1985
- Nagao A. Tanaka K. “The Effect of Swirl Control on Combustion Improvement of Spark Ignition Engine,” Paper C54/83, I. Mech. E. 1983
- “Modes and Measures of Cyclic Combustion Variability,” SAE Paper 830337 1983
- Rask R.B. “Comparison of Window, Smoothed-Ensemble, and Cycle-by-Cycle Data Reduction Techniques for Laser Doppler Anemometer Measurements of In-Cylinder Velocity,” FLUID MECHANICS OF COMBUSTION SYSTEMS Morel T. Lohmann R. P. Rackley J. M. ASME New York 1981
- Saxena V. “Power Spectrum Estimation from Randomly Sampled Velocity Data,” International Symposium in Laser Anemometry, FED 33 209 Dybbs A. Pfund P. A. ASME New York 1985
- Tippelmann G. “A New Method of Investigation of Swirl Ports,” SAE Paper 770404 1977
- Vafidis C. “Influence of Induction Swirl and Piston Configuration on Air Flow in a Four-stroke Model Engine,” Proc. Inst. Mech. E. 1982 4
- Arcoumanis C. Bicen A.F. Whitelaw J.H. “Effect of inlet Parameters on the flow characteristics in a Four-Stroke Model Engine,” SAE Paper 820750 1982
- Monaghan M.L. Pettifer H.F. “Air Motion and Its Effect on Diesel Performance and Emissions,” SAE Paper 810255 1981
- Catania A.E. “Induction System Effects on the Fluid Dynamics of a DI Automotive Diesel Engine,” ASME Paper 85-DGP-11 Energy Sources and Technology Conference Dallas, TX 1985
- Arcoumanis C. Whitelaw J.H. “Fluid Mechanics of Internal Combustion Engines: A Review,” INTERNATIONAL SYMPOSIUM ON FLOWS IN INTERNAL COMBUSTION ENGINES-III FED 28 Uzkan T. Tiederman W.G. Novak J.M. ASME New York 1985
- Semenov E.S. “Studies of Turbulent Gas Flows in Piston Engines,” Tech. Transl. F-97 NASA 1963
- Lancaster D.R. “Effects of Engine Variables on Turbulence in a Spark-ignition Engine,” SAE Paper 760159 1976
- Grasso F. Bracco F.V. “Sensitivity of Chamber Turbulence to Intake Flows in Axisymmetric Reciprocating Engines,” AIAA Journal April 1983 637 640
- Brandl F. Reverencic I. Cartellieri W. Dent J.C. “Turbulent Airflow in the Combustion Bowl of a DI Diesel Engine and Its Harmful Effects on Engine Performance,” SAE Paper 790040 1979
- Liou T.M. Santavicca D.A. “Cycle Resolved Turbulence Measurements in a ported Engine with and Without Swirl,” SAE Paper 830419 1983
- Winsor R.E. Patterson D.J. “Mixture Turbulence - A Key to Cyclic Combustion Variation,” SAE Paper 730086 1973
- Witze P.O. “Influence of Air Motion Variation on the Performance of a Direct Injection Stratified Charge Engine,” I. Mech. E. publication 1980-9 1980
- Gosman A.D. Johns R.J.R. Watkins A.P. “Development of Prediction Methods for In-cylinder Processes in Reciprocating Engines,” Combustion Modeling in Reciprocating Engines Mattavi J.N. Amann C.A. Plenum Press 1980
- Wakisaka T. Hamamoto Y. Ohigashi S. Hashimoto M. “Measurements of Air Swirl and its Turbulence Characteristics in The Cylinder of an Internal Combustion Engine,” I. Mech. E. paper C91/79 1979
- Liou T.M. Santavicca D.A. “Cycle Resolved LDV Measurements in a Motored IC Engine” ASME Symposium on Engineering Applications of Laser Velocimetry Phoenix 1982
- Straddling R.J. Pettifer H.F. “Laser Doppler Velocimeter Measurements on a Motored Direct Injection Diesel Engine (2). Assessment of the E-16 Shallow Ramp Helical Port,” Ricardo Consulting Engineers report DP 81/983 1981
- Groff E.G. Matekunas F.A. “The Nature of Turbulent Flame Propagation in a Homogeneous Spark-Ignited Engine” SAE Paper 800133 1980