임펄스 토크 스월미터를 이용한 헬리컬 흡기포트내의 선회유동특성에 관한 연구
An Experimental Study on the Swirl Characteristics of Helical Intake Port using an Impulse Torque Swirl Meter
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초록
This study was experimentally analyzed to search the swirl characteristics of helical intake port for the performance improvement in direct injection diesel engine. The intake port flow is important factor which has influence on the engine performance because the properties in the injected fuel depend on the combustion characteristics. In order to analyze the characteristics of swirl in the helical intake port of cylinder head, flow coefficient and swirl ratio were measured by an impulse swirl torque meter at position of 1.75 cylinder diameter for different valve lifts at the steady flow condition with intake port of the in-line and V type engine. Each intake ports were established swirl ratio 1.70, 2.13, 2.25, 2.38 and 2.43 by hand working. The results of steady flow test showed that flow coefficient and swirl intensity increased as valve lift increased, while the increase of swirl ratio according to the change of intake port geometry decreased mean flow coefficient and increased Gulf factor.
Abstract
This study was experimentally analyzed to search the swirl characteristics of helical intake port for the performance improvement in direct injection diesel engine. The intake port flow is important factor which has influence on the engine performance because the properties in the injected fuel depend on the combustion characteristics. In order to analyze the characteristics of swirl in the helical intake port of cylinder head, flow coefficient and swirl ratio were measured by an impulse swirl torque meter at position of 1.75 cylinder diameter for different valve lifts at the steady flow condition with intake port of the in-line and V type engine. Each intake ports were established swirl ratio 1.70, 2.13, 2.25, 2.38 and 2.43 by hand working. The results of steady flow test showed that flow coefficient and swirl intensity increased as valve lift increased, while the increase of swirl ratio according to the change of intake port geometry decreased mean flow coefficient and increased Gulf factor.
참고문헌 (10)
- Diesel Engine Cylinder Head Design: The Compromises and the Techniques, "N.F.Gale", ~, pp.SAE 900475 (1990)
- An Analysis of Swirling Flow in Cylinder for Predicting D.I.Diesel Engine Performance, "K.Kajiyama", ~, pp.SAE 840518 (1984)
- A New Method of Investigation of Swirl Ports, "G.Tippelmann", ~, pp.SAE 770404 (1974)
- The Measure-ment and Analysis of Swirl in Steady flow, "C.R.stone", ~, pp.SAE 921642 (1992)
- Effect of Air Swirl on Smoke and Emissions from Direct Injection Diesel Engines, "I.M.Kahn", ~, pp.SAE 720102 (1972)
- A.F.Bicen, "Steady and Unsteady Air flow Through the Intake Valve of a Reciprocating Engine", ASME Journal of Fluids Eng, 107(3), pp.413~420 (1985)
- C.Arcoumanis, "Valve and In-Cylinder Flow Generated by Helical Port in a Production Diesel Engine", ASME Jounral of Fluids Eng, 109(4), pp.368~374 (1987)
- Swirl Generation by Helical Ports, "C.Arcoumanis", ~, pp.SAE 890790 (1989)
- The Impulse Swirl Meter, "N.F.Gale", ~, pp.Report DP. 79 (1979), 1232
- Analysis of Steady Flow Tests on Inlet and Exhaust Ports, "G.D.Partington", ~, pp.Ricardo Report. 80 (1980), 1123