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http://dx.doi.org/10.3795/KSME-B.2009.33.1.9

In-Cylinder Compression Flow Characteristics of Helical Port Engines with Wide Valve Angle  

Ohm, In-Yong (서울산업대학교 기계공학과)
Park, Chan-Jun (서울산업대학교 기계공학과)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.33, no.1, 2009 , pp. 9-16 More about this Journal
Abstract
This paper is the second of 2 companion papers which investigate in-cylinder swirl generation characteristics in helical port engine with wide valve angle. Two wide valve-angle engines, which are same ones and have slightly different rig swirl number, were used to compare the characteristics of cylinder-flow. One intake port is deactivated to induce swirl flow. A PIV (Particle Image Velocimetry) was applied to measure in-cylinder velocity field during intake stroke. The results show that the intake flow component passing through valve area near the cylinder wall is not negligible in helical port engine with wide valve angle contrary to conventional one. The effect of this velocity component on in-cylinder increases as the swirl ratio rises and compression process progresses. Consequently, this component destroys in-cylinder swirl flow completely during compression resulting in no actual swirl at the end stage of compression.
Keywords
PIV(Particle Image Velocimetry); Valve Angle; Helical Port; In-Cylinder Flow; Swirl;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
Times Cited By SCOPUS : 0
연도 인용수 순위
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