직접 분사식 소형 디젤엔진의 실린더내 스월 유동장에 미치는 흡기포트의 형상에 관한 연구
- Title
- 직접 분사식 소형 디젤엔진의 실린더내 스월 유동장에 미치는 흡기포트의 형상에 관한 연구
- Other Titles
- A Study on the Effects of Intake Port Geometry on In-Cylinder Swirl Flow Field in a Small D.I. Diesel Engine
- Author
- 이기형
- Keywords
- Intake port(흡기포트),; Steady state flow test( 정상유동실험),; Bypass(바이패스통로); SCV(스월콘트 롤밸브); Swirl ratio(스월 비)
- Issue Date
- 2004-11
- Publisher
- 한국자동차공학회
- Citation
- 한국자동차공학회 논문집, v.12, No.6, Page.38-45
- Abstract
- This paper studies the effects of intake port configuration on the swirl that is key parameter in the flow field of direct injection diesel engines. In-cylinder flow characteristics is known to have significant effects on fuel air mixing, combustion and emissions. To investigate the swirl flow generated by various intake ports, steady state flow tests were conducted to evaluate the swirl. Helical port geometry, SCV shape and bypass were selected as the design parameters to increase the swirl flow and parametric study was performed to choose the optimal port shape that would generate a high swirl ratio efficiently. The results revealed that a key factor in generating a high swirl ratio was to suitably control the direction of the intake air flow passing through the valve seat. For these purposes, we changed the distance of helical and tangential port as well as installed bypass near the valve seat and the effects of intake port geometry on in-cylinder flow field were visualized by a laser sheet visualization method. From the experimental results, we found that the swirl ratio and mass flow rate had a trade off relation. In addition, the result indicates that the bypass is a effective method to increase the swirl ratio without sacrificing mass flow rate.
- URI
- http://www.dbpia.co.kr/journal/articleDetail?nodeId=NODE00564784https://repository.hanyang.ac.kr/handle/20.500.11754/154875
- Appears in Collections:
- COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MECHANICAL ENGINEERING(기계공학과) > Articles
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