Browse > Article

Effect of Inlet Valve Angle on In-Cylinder Swirl Generation Characteristics(I)  

Ohm, In-Yong (Department of Mechanical Engineering, Seoul National University of Technology)
Park, Chan-Jun (Department of Mechanical Engineering, Seoul National University of Technology)
Publication Information
Transactions of the Korean Society of Automotive Engineers / v.16, no.6, 2008 , pp. 148-156 More about this Journal
Abstract
This paper is the first of 2 companion papers which investigate in-cylinder swirl generation characteristics according to inlet valve angle. Two DOHC 4 valve engines, one has wide intake valve angle and the other has narrow valve angle, were used to compare the characteristics of swirl motion generation in the cylinder. One intake port was deactivated to induce swirl flow. A PIV (Particle Image Velocimetry) was applied to measure in-cylinder velocity field according to inlet valve angle during intake stroke. The results show that the stronger swirl motion is observed in wide valve angle engine at the early intake stage; however, the swirl motion is gradually distorted by the intake flow component passing through valve area near the cylinder wall as the stroke proceeds. The tumble motion also does so in wide angle. On the contrary, the swirl and tumble motions, which are not clear at the initial stage, become better and better arranged as the piston goes down and up again after bottom dead center.
Keywords
PIV(Particle Image Velocimetry); Valve angle; In-Cylinder flow; Swirl;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
연도 인용수 순위
1 I. Y. Ohm, C. J. Park and H. S, Kim, "In- Cylinder Compression Flow Characteristics of Helical Port Engines with Wide Valve Angle," Fall Conference Proceedings, Vol.I, KSAE, pp.167-174, 2006
2 J. H. Park, N. H. Lee and K. H. Choi, "Analysis of Spray and Flow Fields for Development of Spark-ignited Direct Injection Engine," Transactions of KSAE, Vol.6, No.6, pp.202-209, 1998
3 I. Y. Ohm and C. L. Myung, "In-Cylinder Flow Measurement Using PIV," Spring Conference Proceedings, KSAE, Vol.I, pp.80-87, 2002
4 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, 2005
5 K. H. Lee, J. D. Ryu, C. S. Lee and R. D. Reitz, "Effect of Intake Port Geometry on The In-Cylinder Flow Characteristics in A High Speed D.I. Diesel Engine," Int. J. Automotive Technology, Vol.6, No.1, pp.1-8, 2005   과학기술학회마을
6 C. H Lee, K. H. Lee and C. S. Lee, "An Experimental Study on the Flow Characteristics and the Stratification Effects in Visualization Engine Using the DPIV and the Entropy Analysis," Transactions of KSAE, Vol.13, No.1, pp.9-18, 2005   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 III-With High Swirl," Transactions of KSAE, Vol.9, No.3, pp.18-26, 2001
8 I. Y. Ohm, C. J. Park and H. S. Kim, "In- Cylinder Intake Flow Characteristics of Helical Port Engines with Wide Valve Angle," Fall Conference Proceedings, Vol.I, KSAE, pp.138- 146, 2006
9 K. H. Lee, C. S. Lee, H. G. Lee, M. S. Chon and Y. C. Joo, "Spatial Analysis of Turbulent Flow in Combustion Chamber using High Resolution Dual Color PIV," Transactions of KSAE, Vol.6, No.6, pp.132-141, 1998
10 S. Y. Lee, K. S. Jeong, C. H. Jeon and Y. J. Chang "Study on The In-Cylinder Flow Characteristics of An SI Engine Using PIV," Int. J. Automotive Technology, Vol.6, No.5, pp.453-460, 2005   과학기술학회마을
11 J. H. Park, N. H. Lee and K. H. Choi, "Analysis of In-Cylinder Flow Fields using Particle Image Velocimetry," Transactions of KSAE, Vol.7, No.4, pp.46-53, 1999
12 G. B. Cho, C. H. Jeon, Y. J. Chang and K. Y. Kang, "Characteristics of In-cylinder Steady Flow using PIV for Different Intake Port Geometries in a 4-valve Gasoline Engine," Transactions of KSAE, Vol. 5, No.5, pp.188-196, 1997   과학기술학회마을
13 G. B. Cho, C. H. Jeon, Y. J. Chang and K. Y. Kang, "Characteristics of In-cylinder Steady Flow using PIV for Different Intake Port Geometries in a 4-valve Gasoline Engine," Transactions of KSAE, Vol. 5, No.5, pp.188-196, 1997   과학기술학회마을
14 I. Y. Ohm and Y. S. Cho, "Mechanism of Axial Stratification and its Effect in an SI Engine," SAE 2000-01-2843, 2000 SAE Transaction -Journal of Fuel & Lubricants, 2001