This content is not included in your SAE MOBILUS subscription, or you are not logged in.
An Experimental Study of In-Cylinder Air Flow in a 3.5L Four-Valve SI Engine by High Speed Flow Visualization and Two-Component LDV Measurement
ISSN: 0148-7191, e-ISSN: 2688-3627
Published March 01, 1993 by SAE International in United States
Annotation ability available
In-cylinder flows in four-valve SI engines were examined by high frame rate flow visualization and two-component LDV measurement. It is believed that the tumble and swirl motion generated during intake breaks down into small-scale turbulence later in the cycle. The exact nature of this relationship is not well known. However, control of the turbulence offers control of the combustion process. To develop a better physical understanding of the in-cylinder flow, the effects of the cylinder head intake port configuration and the piston geometry were examined.
For the present study, a 3.5L, four-valve engine was modified to be mounted on an AVL single cylinder research engine type 520. A quartz cylinder was fabricated for optical access to the in-cylinder flow. Piston rings were replaced by Rulon-LD rings. A Rulon-LD ring is advantageous for the optical access as it requires no lubrication.
Four different cylinder head intake port configurations and two piston geometries were studied using a high speed flow visualization technique. Examination of these films suggested that quantitative velocity measurements be conducted for the two different piston configurations. The effect of the piston geometry on the in-cylinder flow was examined by LDV measurement. The flow visualization shows that cylinder head intake port configuration plays a significant role in the generation of initial tumble motion in the early stage of the intake stroke. While the in-cylinder flow is developing, the pop-up piston geometry accelerates the flow field in the axial direction, which provides the strong tumble motion. This may result in an improvement in small-scale turbulence late in the compression stroke.
- Keunchul Lee - Michigan State Univ.
- Seoung-Chool Yoo - Michigan State Univ.
- Tom Stuecken - Michigan State Univ.
- Dan McCarrick - Michigan State Univ.
- Harold Schock - Michigan State Univ.
- Fakhri Hamady - US EPA
- Leon A. LaPointe - Ricardo of North America
- Philip Keller - Chrysler Motors Corp.
- Peter Hartman - Chrysler Motors Corp.
CitationLee, K., Yoo, S., Stuecken, T., McCarrick, D. et al., "An Experimental Study of In-Cylinder Air Flow in a 3.5L Four-Valve SI Engine by High Speed Flow Visualization and Two-Component LDV Measurement," SAE Technical Paper 930478, 1993, https://doi.org/10.4271/930478.
- Henriot, S., Le Coz, J.F. and Pinchon P, “Three-Dimensional Modeling of the Flow and Turbulence in a Four-Valve S.I. Engine - Comparison with LDV Measurements,” SAE Paper No. 890843, 1989.
- Le Coz, J.F., Henriot, S. and Pinchon, P., “An Experimental and Computational Analysis of the Flow Field in a Four-Valve Spark Ignition Engine- Focus on Cycle-Resolved Turbulence,” SAE paper No. 900056, 1990.
- Endres, H., Neuber, H.J. and Wunns, R., “Influence of Swirl and Tumble on Economy and Emissons of Multi-Valve SI Engine,” SAE Paper No. 920516, 1992.
- Kudou, H., Yamamoto, H. and Lida, Y., “A Study About In-Cylinder Flow and Combustion in a 4-Valve SI Engine,” SAE paper No. 920574, 1992.
- Schock, H. J., Hamady, F. J. and Stuecken, T.R., “Air Flow Visualization and LDV Measurements Around an Intake Valve in a Chrysler 2.2L Cylinder Head,” Technical report MSUREL R-89-2, Chrysler Motors Corporation, Sep. 25, 1989.
- Schock, H.J., Harnady, F.J., Defilippis, M.S. and LaPointe, L.A., “High Frame Rate Flow Visualization and LDV Measurements in a Steady Flow Cylinder Head Assembly,” SAE Paper No. 910473, Feb. 25, 1991.
- Hamady, FJ., Chouinard, E.N., Somerton, C.W., Schock, HJ., Chun, K.S. and Hicks, YR., “Stratified Charge Rotary Engine Internal Flow Studies,” SAE Paper No. 890331, Feb. 27, 1989. Also volume 98, Sec. 3, SAE Trans., 1989.
- Hamady, F.J., Stuecken, T.R. and Schock, HJ., “Air Flow Visualization and LDV Measurements in a Motored Rotary Engine Assembly - Part 1,” SAE Paper No. 900030, Feb. 26, 1990. Also volume 99, Sec 3, SAE Trans., 1990.
- Chouinard, E.N., Hamady, F.J. and Schock, H.J., “Airflow Visualization and LDV Measurements in a Motored Rotary Engine Assembly - Part 2,” SAE Paper No. 900031, Feb. 26, 1990. Also volume 99, Sec 3, SAE Trans., 1990.
- Hamady, F.J., Stuecken, TR. and Schock, H.J., “Experimental Analysis of Blowby and Flow Field Interaction in a Motored Rotary Engine,” SAE Paper No. 910893, Feb. 25, 1991.
- Regan, C.A., Chun, K.S. and Schock, H.J., “Engine Flow Visualization Using Copper Vapor Laser,” Proceedings of SPIE, Vol. 737, pp. 17-27, 1987.
- Morita, T.B., Hamady, FJ., Stuecken, T.R., Somerton, C.W. and Schock, H.J., “Fuel- Air Mixing Visualization in a Motored Rotary Engine Assembly,” SAE Paper No. 910704, Feb. 25, 1991.
- Instruction Manual for Digital Burst Correlator, TSI Inc., April, 1991.
- Adrian, Ron, “High Speed Correlation Techniques,” TSI Quarterly, Vol VIII, Issue 2, April-June, 1982.
- Rask, R.B., “Laser Doppler Anemometer Measurements in an Internal Combustion Engine,” SAE Paper No. 790094, Feb. 26, 1979.
- Falco, R.E., Gendrich, C.R, and Chu, C.C., “Vorticity Field Measurements Using Laser Induced Photochemical Anemometry,” Seventh Symposium on Turbulent Shear Flows, Stanford University, August 21-23, 1989.
- Reuss, D.L., Adrian, R.J., Landreth, C.C., French, D.T., and Fansler, T.D., “Instantaneous Planar Measurements of Velocity and Strain Rate in an Engine Using Particle-Image Velocimetry,” SAE Paper No. 890616, 1989.