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
pp.29-35
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.
1. 서론
2. 실험장치 및 방법
3. 실험결과 및 고찰
3.1 밸브양정변화에 따른 유량계수 분포
3.2 밸브양정변화에 따른 무차원 리그스월 분포
3.3 포트형상변화에 따른 유동특성
4. 결론
참고문헌