Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
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Study on Evaluation Method of Flow Characteristics in Steady Flow Bench(1) - Raising Issue

정상유동 장치에서 유동 특성 평가 방법에 대한 연구(1) - 문제의 제기

  • Park, Chanjun (Department of Mechanical & Automotive Engineering, Seoul National University of Science & Technology) ;
  • Ohm, Inyong (Department of Mechanical & Automotive Engineering, Seoul National University of Science & Technology)
  • 박찬준 (서울과학기술대학교 기계.자동차공학과) ;
  • 엄인용 (서울과학기술대학교 기계.자동차공학과)
  • Received : 2014.11.05
  • Accepted : 2014.11.27
  • Published : 2015.01.01
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Abstract

This paper is the first investigation on the evaluation methods of flow characteristics in the steady bench. For this purpose, several assumptions used in the steady flow evaluation are examined, comparing the measured and/or processed results by the conventional impulse swirl meter with the ones by the real velocity through a particle image velocimetry. The results show that the most questionable assumption is the solid rotation of swirl. With regard to this assumption, the flow characteristics by the conventional methods are distorted seriously by both of the eccentricity of the swirl center and non-uniform velocity profile along the cylinder radial direction. In addition, the cylinder axial velocity distribution also has the great effect on the flow characteristics.

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References

  1. I. Y. Ohm and C. J. Park, "Effect of Fuel Stratification on Initial Flame Development: Part 1 - Without Swirl," Int. J. Automotive Technology, Vol.7, No.5, pp.519-526, 2006.
  2. I. Y. Ohm and C. J. Park, "Effect of Fuel Stratification on Initial Flame Development: Part 2-Low Swirl Condition," Int. J. Automotive Technology, Vol.9, No.6, pp.671-678, 2008. https://doi.org/10.1007/s12239-008-0079-5
  3. I. Y. Ohm and C. J. Park, "Effect of Fuel Stratification on Initial Flame Development: Part 3-High Swirl Condition," Int. J. Automotive Technology, Vol.12, No.5, pp.653-660, 2011. https://doi.org/10.1007/s12239-011-0076-y
  4. M. G. Kang and I. Y. Ohm, "Effect of Intake Flow Control Method on Part Load Performance in SI Engine - Comparison of Throttling and Masking," Transactions of KSAE, Vol.22, No.2, pp.156-165, 2014. https://doi.org/10.7467/KSAE.2014.22.2.156
  5. M. G. Kang and I. Y. Ohm, "Effect of Intake Flow Control Method on Part Load Performance in SI Engine - EGR Characteristics and Comparison of Dilution Method," Transactions of KSAE, Vol.22, No.4, pp.121-130, 2014. https://doi.org/10.7467/KSAE.2014.22.4.121
  6. I. Y. Ohm and Y. S. Cho, "In-cylinder Fuel Behavior according to Fuel Injection Timing and Port Characteristics in an SI Engine : Part I - Without Swirl," Transactions of KSAE, Vol.9, No.2, pp.19-27, 2001.
  7. I. Y. Ohm and Y. S. Cho, "In-cylinder Fuel Behavior according to Fuel Injection Timing and Port Characteristics in an SI Engine : Part II - With Low/Medium Swirl," Transactions of KSAE, Vol.9, No.3, pp.9-17, 2001.
  8. I. Y. Ohm and Y. S. Cho, "In-cylinder Fuel Behavior according to Fuel Injection Timing and Port Characteristics in an SI Engine : Part III - With High Swirl," Transactions of KSAE, Vol.9, No.3, pp.18-26, 2001.
  9. J. B. Heywood, Internal Combustion Engine Fundamentals, Int. Edn., McGraw-Hill, Singapore, pp.343-345, 1988.
  10. I. Y. Ohm and C. J. Park, "In-cylinder Intake Flow Characteristics according to Inlet Valve Angle," Transactions of KSAE, Vol.14, No.3, pp.142-149, 2006.
  11. I. Y. Ohm and C. J. Park, "In-cylinder Compression Flow Characteristics according to Inlet Valve Angle," Transactions of KSAE, Vol.14, No.4, pp.77-83, 2006.
  12. I. Y. Ohm and C. J. Park, "In-cylinder Intake Flow Characteristics of Helical Port Engines with Wide Valve Angle," Transactions of KSME, Vol.32, No.10, pp.761-768, 2008. https://doi.org/10.3795/KSME-B.2008.32.10.761
  13. I. Y. Ohm and C. J. Park, "In-cylinder Compression Flow Characteristics of Helical Port Engines with Wide Valve Angle," Transactions of KSME, Vol.32, No.1, pp.9-16, 2009. https://doi.org/10.3795/KSME-B.2009.33.1.9
  14. I. Y. Ohm and C. J. Park, "Effect of Inlet Valve Angle on In-cylinder Swirl Generation Characteristics(I)," Transactions of KSAE, Vol.16, No.6, pp.148-156, 2008.
  15. I. Y. Ohm and C. J. Park, "Effect of Inlet Valve Angle on In-cylinder Swirl Generation Characteristics(II)," Transactions of KSAE, Vol.17, No.1, pp.42-48, 2009.
  16. I. Y. Ohm, "Effects of Intake Valve Angle on Combustion Characteristic in an SI Engine," Int. J. Automotive Technology, Vol.14, No.4, pp.529-537, 2013. https://doi.org/10.1007/s12239-013-0057-4
  17. J. B. Heywood, Internal Combustion Engine Fundamentals, Int. Edn., McGraw-Hill, Singapore, pp.226-227, 1988.
  18. Superflow Corporation, Superflow 600 Instructions, Appendix I, Colorado Springs, 1988.
  19. R. Stone, Introduction to Internal Combustion Engines, 2nd Edn., McGraw-Hill, Hong Kong, pp.183-185, 1992.
  20. J. B. Heywood, Internal Combustion Engine Fundamentals, Int. Edn., McGraw-Hill, Singapore, pp.225-227, 1988.
  21. J. B. Heywood, Internal Combustion Engine Fundamentals, Int. Edn., McGraw-Hill, Singapore, pp.349-351, 1988.
  22. SwRI, Cylinder Head Port Design, Presentation, 1999.
  23. A. E. Perry and M. S. Chong, "A Description of Eddying Motions and Flow Patterns Using Critical-point Concepts," Annual Review of Fluid Mechanics, Vol.19, pp.125-155, 1987. https://doi.org/10.1146/annurev.fl.19.010187.001013

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