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An Experimental Study of Velocity and Reynolds Stress Distributions in a Production Engine Inlet Port Under Steady Flow Conditions.
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English
Abstract
Laser-Doppler anemometry was used to investigate steady flows in a helical port from a production engine. To enable optical access to all parts of the port and cylinder, the working fluid was a mixture of liquids with a refractive index identical to that of the acrylic material used for the test section. Measurements were made of the three mean velocity components and the corresponding turbulence levels and Reynolds stresses for four valve lifts. The discharge coefficient of the port was also measured.
Detailed mean flow measurements are presented for valve lifts of 6 and 9 mm, and less extensive data for lifts of 3 and 12 mm. There was little variation of the flow with valve lift in the upstream part of the port. The flow pattern in the vicinity of the valve and inside the cylinder did however vary with lift. There was evidence of some counter-swirl generated at the port exit. The swirl pattern inside the cylinder was dominated by a double rotation at the two lower lifts and a single rotation at the higher lifts. Results obtained at Reynolds numbers of 34,500 and 38,600 showed little difference in the flow patterns with flow rate through the port. For comparison, some measurements were made at certain locations in the cylinder with air flowing through the test section and matching Reynolds numbers to the liquid flow. There was agreement between both mean and r.m.s. velocities. Turbulent shear stress distributions are presented which show a complex variation throughout the port and cylinder. The measurements are in suitable form for use in the development and assessment of numerical calculations of the flows.
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Cheung, R., Nadarajah, S., Tindal, M., and Yianneskis, M., "An Experimental Study of Velocity and Reynolds Stress Distributions in a Production Engine Inlet Port Under Steady Flow Conditions.," SAE Technical Paper 900058, 1990, https://doi.org/10.4271/900058.Also In
References
- Tindal M.J. Cheung R.S. Yianneskis M. “Velocity Characteristics of Steady Flows through Engine Inlet Ports and Cylinders” SAE Paper 880383 1988
- Tindal M.J. Suen K.O. Yianneskis M. “The Variation of Flow Pattern in a Diesel Engine Cylinder with Speed” SAE Paper 890791 1989
- Yianneskis M. Tindal M.J. Suen K.O. “A Comparison of Cycle-Resolved and Ensemble-Averaged Measurements in a Diesel Engine” SAE Paper 890617 1989
- Tanaka K. “Air Flow Through Suction Valve of Conical Seat” Aeronautical Research Institute Report Tokyo Imperial University 260 361 1929
- Wood G.B. Hunter D.U. Taylor E.S. Taylor C.F. “Airflow Through Intake Valves” Transactions of SAE 50 212 1942
- Kastner L.J. Williams T.J. White J.B. “Poppet Inlet Valve Characteristics and their Influence on the Induction Process” Proc. I. Mech. E. 178 955 975 1963
- Woods W.A. Khan S.R. “An Experimental Study of Flow Through Poppet Valves” Proc. Instn. Mech. Engrs. 180 32 1965
- Annand W.J.D. “Engine Breathing” Automobile Engineer February 1969
- Fukutani I. Watanabe E. “Air Flow Through Poppet Inlet Valves - Analysis of Static and Dynamic Flow Coefficients” SAE Paper 820154 1982
- Bicen A.F. Vafidis C. Whitelaw J.H. “Steady and Unsteady Airflow Through the Intake Valve of a Reciprocating Engine” Journal of Fluids Engineering 107 413 420 1985
- Brandstatter W. Johns R.J.R. Wigley G. “The Effect of Inlet Port Geometry on In-Cylinder Flow Structure” SAE Paper 850499 1985
- Khalighi B. El Tahry S.H. Kuziak W.R. “Measured Steady Flow Velocity Distributions Around a Valve/Seat Annulus” SAE Paper 860462 1986
- Ahmed A.M.Y. Gosman A.D. “Measurements and Multidimensional Prediction of Flow in an Axisymmetric Port/Valve Assembly” SAE Paper 870592 1987
- Arnold M.J. Tindal M.J. Williams T.J. “Measurement of Induction Gas Velocities in a Reciprocating Engine Cylinder” SAE Paper 720115 1972
- Yianneskis M. Cheung R.S. Tindal M.J. “A Method of Investigating Flows in Inlet Ports of Complex Shape” Proc. of the International Conference on Combustion in Engines I. Mech. E London 10-12th May 1988
- Taylor A.M.K.P. Whitelaw J.H. Yianneskis M. “Curved Ducts with Strong Secondary Motion: Velocity Measurements of Developing Laminar and Turbulent Flow” Journal Fluids Engineering 104 350 358 1982
- Wigley G. Hawkins M.G. “Three Dimensional Velocity Measurements by Laser Anemometry in a Diesel Engine Cylinder under Steady State Flow Conditions” SAE Paper 780060 1978
- Arcoumanis C. Vafidis C. Whitelaw J.H. “Valve and In-Cylinder Flow Generated by a Helical Port in a Production Diesel Engine” Symposium on Flows in Reciprocating Engines. ASME Winter Annual Meeting Florida 1985
- Tennekes H. Lumley J.L. “A First Course in Turbulence” The MIT Press Cambridge, Mass. 1983
- Annand W.J.D. Roe G.E. “Gas Flow in the Internal Combustion Engine” Foulis, Yeovil, UK 1974
- Cheung R.S.W. “An Investigation of Flow Patterns Inside Inlet Ports” University of London 1989
- Nadarajah S. Tindal M.J. Yianneskis M. “Comparison of Air and Liquid Steady Flows Through Inlet Ports” Proceedings of the Institution of Mechanical Engineers 1990