Journal of Mechanical Science and Technology

The Korean Society of Mechanical Engineers (대한기계학회)
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A study on the Characteristics of In-Cylinder Intake Flow in Spark Ignition Engine Using the PIV

  • Lee Suk-Young (Department of Mechanical Engineering, Pusan National University) ;
  • Jeong Ku-Seob (Department of Automotive Engineering, jinju International University) ;
  • Jeon Chung-Hwan (Department of Mechanical Engineering, Pusan National University) ;
  • Chang Young-June (Department of Mechanical Engineering, Pusan National University)
  • Published : 2005.02.01
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Abstract

In this study, to investigate in-cylinder tumble or swirl intake flow of a gasoline engine, the flow characteristics were examined with opening control valve (OCV) and several swirl control valves (SCV) which intensify intake flow through steady flow experiment, and also turbulent characteristics of in-cylinder flow field were investigated by 2-frame cross-correlation particle image velocimetry (PIV) method. In the investigation of intake turbulent characteristics using PIV method, the different flow characteristics were showed according to OCV or SCV figures. The OCV or SCV installed engine had higher vorticity and turbulent kinetic energy than a baseline engine, especially around the wall and lower part of the cylinder. Above all, SCV B type was superior to the others. About energy dissipation and reynolds shear stress distribution, a baseline engine had larger loss than OCV or SCV installed one because flow impinged on the cylinder wall. It should be concluded, from what has been said above, as swirl component was added to existing tumble flow adequately, it was confirmed that turbulent intensity was enlarged, flow energy was conserved effectively through the experiment. In other words, there is a suggestion that flow characteristics as these affected to in-cylinder combustion positively.

Keywords

References

  1. Arcoumanis, C., Hu, Z. and Whitelaw, J. H., 1993, 'Steady Flow Characterization of Tumble Generation Four-Valve Cylinder Heads,' Mech Processing Instn Mech Eng., Vol. 207, pp. 1-9
  2. Bae, C. S., Lee, J. H., Oh, S. M., Kang, K. Y., 1999, 'The Effects of Tumble and Swirl Flows on the Flame Propagation in a 4-valve SI Engine,' Jounal of KSAE, 7, 2, pp. 50-58
  3. Furuno, S., Iguchi, S., Oishi, K. and Inoue, T., 1990, 'The Effects of Inclination Angle of Swirl axis on Turbulence Characteristics in a Lean Burn Engine with SCV,' COMODIA 90, pp. 437-442
  4. Hacohen, J., Beltmont, M. R. and Ashcroft, S. J., 1994, 'Flame Speeds in a Spark Ignition Engine,' SAE Paper No. 942050
  5. Lee, J. H. and Farrell, P. V., 1993, 'Intake Valve Measurement of an in Engine Using Particle Image Velocimetry,' SAE Paper No. 930480, pp. 629-645
  6. Lee, K. H., Lee, C. S., Lee, H. G., Chun, M. S. and Joo, Y. C., 1998, 'Spatial Analysis of Turbulent Flow in Combustion Chamber using High Resolution Dual Color PIV,' Jounal of KSAE, 6,6, pp.132-141
  7. Lee, K. H., Lee, C. S., Lee, H. G., Chon, M. S. and Joo, Y. C., 1998, 'Spatial Analysis of Turbulent Flow in Combustion Chamber using High Resolution Dual Color PIV,' Journal of KSAE, 6, 6, pp. l32-141
  8. Melling, A., 1997, 'Tracer Particles and Seeding for Particle Image Velocimetry,' Meas. Sci. Technol., Vol. 8, pp. 1406-1416 https://doi.org/10.1088/0957-0233/8/12/005
  9. Ronnback, M. et al., 1991, 'Study of Induction Tumble by Particle Tracking Velocimetry in a 4-Valve Engine,' SAE Paper No. 912376, pp. 25-32
  10. Sung, J. Y. and Lee, I. S., 2003, 'Optimal Flow Control of Ceiling Type Indoor Unit by PIV Measurements,' Transactions of the KSME, B, Vol. 27, No.8, pp. 1042-1050 https://doi.org/10.3795/KSME-B.2003.27.8.1042
  11. Urushihara, T., Murayama, T., Takagi Y. and Lee K. H., 1995, 'Turbulence and Cycle-by-cycle Variation of Mean Velocity Generated by Swirl and Tumble Flow and Their Effects on Combustion,' SAE Paper No. 950813
  12. Woo, Y. W. and Lee, C. S., 2002, 'A Study on the Spray Characteristics for a Gasoline Direct Injector by Using Entropy Analysis and PIV Methods,' Transactions of the KSME, B, Vol. 26, No.7, pp. 1047-1054 https://doi.org/10.3795/KSME-B.2002.26.7.1047