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http://dx.doi.org/10.7467/KSAE.2015.23.1.088

Study on Evaluation Method of Flow Characteristics in Steady Flow Bench(1) - Raising Issue  

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)
Publication Information
Transactions of the Korean Society of Automotive Engineers / v.23, no.1, 2015 , pp. 88-96 More about this Journal
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.
Keywords
Steady flow bench; Swirl; Impulse swirl meter; PIV; Velocity profile; Eccentricity;
Citations & Related Records
Times Cited By KSCI : 10  (Citation Analysis)
연도 인용수 순위
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.   DOI
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.   DOI   ScienceOn
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.   과학기술학회마을   DOI   ScienceOn
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.   과학기술학회마을   DOI
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.   과학기술학회마을
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.   과학기술학회마을
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.   과학기술학회마을
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.   과학기술학회마을
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.   과학기술학회마을   DOI
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.   과학기술학회마을   DOI
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.   과학기술학회마을
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.   DOI
17 J. B. Heywood, Internal Combustion Engine Fundamentals, Int. Edn., McGraw-Hill, Singapore, pp.225-227, 1988.
18 J. B. Heywood, Internal Combustion Engine Fundamentals, Int. Edn., McGraw-Hill, Singapore, pp.226-227, 1988.
19 Superflow Corporation, Superflow 600 Instructions, Appendix I, Colorado Springs, 1988.
20 R. Stone, Introduction to Internal Combustion Engines, 2nd Edn., McGraw-Hill, Hong Kong, pp.183-185, 1992.
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.   DOI