Discharge characteristics in an IC engine inlet port and the dependency on geometrical parameters are examined for two valves having seat angles of 40 and 45 deg. The characteristics were established under steady-state conditions over a range of valve lifts up to and pressure differentials up to 100 mm The detailed boundary layer characteristics, indicating flow separation and reattachment on the valve seats, were established with the aid of heat transfer data using the transient liquid crystal technique. Details of the experimental methods for obtaining discharge coefficients and heat transfer coefficients are presented. The discharge and heat transfer data established the expected sequential progression, with lift through the four flow regimes for the valve with a 45 deg seat angle. For the valve with a 40 deg seat angle the four flow regimes were not present. The results demonstrate the extreme sensitivity of the valve flow and boundary layer state to small changes in valve geometry. [S0098-2202(00)00504-6]
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December 2000
Technical Papers
Geometric Parameters Influencing Flow in an Axisymmetric IC Engine Inlet Port Assembly: Part I—Valve Flow Characteristics
Andreas Maier, Research Engineer,
Andreas Maier, Research Engineer
School of Computing, Engineering and Technology, University of Sunderland, Sunderland, United Kingdom
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Terry H. Sheldrake, Research and Development Manager,
Terry H. Sheldrake, Research and Development Manager
School of Computing, Engineering and Technology, University of Sunderland, Sunderland, United Kingdom
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Dennis Wilcock, Emeritus Professor of Engineering
Dennis Wilcock, Emeritus Professor of Engineering
School of Computing, Engineering and Technology, University of Sunderland, Sunderland, United Kingdom
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Andreas Maier, Research Engineer
School of Computing, Engineering and Technology, University of Sunderland, Sunderland, United Kingdom
Terry H. Sheldrake, Research and Development Manager
School of Computing, Engineering and Technology, University of Sunderland, Sunderland, United Kingdom
Dennis Wilcock, Emeritus Professor of Engineering
School of Computing, Engineering and Technology, University of Sunderland, Sunderland, United Kingdom
Contributed by the Fluids Engineering Division for publication in the JOURNAL OF FLUIDS ENGINEERING. Manuscript received by the Fluids Engineering Division January 11, 2000; revised manuscript received June 6, 2000. Associate Technical Editor: D. Williams.
J. Fluids Eng. Dec 2000, 122(4): 650-657 (8 pages)
Published Online: June 6, 2000
Article history
Received:
January 11, 2000
Revised:
June 6, 2000
Citation
Maier, A., Sheldrake, T. H., and Wilcock, D. (June 6, 2000). "Geometric Parameters Influencing Flow in an Axisymmetric IC Engine Inlet Port Assembly: Part I—Valve Flow Characteristics ." ASME. J. Fluids Eng. December 2000; 122(4): 650–657. https://doi.org/10.1115/1.1311787
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