인문학
사회과학
자연과학
공학
의약학
농수해양학
예술체육학
복합학
DBpia AI
AI 에이전트
AI 아이디어
AI 리더
AI 뷰어
Citeasy
크롬 서지관리 다운로드
지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록·키워드
Many researchers have developed the measurement technique of in-cylinder flow characteristics and found the effect of intake port geometries on engine performance. The flow characteristics of four-valve cylinder head were examined in a steady flow rig for different intake ports. Tumble in-tensity of intake configurations with different entry angles were quantified with a tumble meter. The velocity and angular momentum distributions in the tumble adaptor were measured under steady conditions with PIV(Particle Image Velocimetry).
We have obtained the results that flow structure becomes complicated by valve interference at low valve lift. As the valve interferences were reducing and the flow rates of tumble direction were increasing according to valve lift increasing and incylinder flow pattern changed to large vortex structure with tumble direction. intake ports with different entry angles have different tumble cen-ters. Tumble eccentricity of intake port with low entry. angle was large, so that the port had rela-tively much angular momentum compared to others which was expected to improve combustion performance.
We have obtained the results that flow structure becomes complicated by valve interference at low valve lift. As the valve interferences were reducing and the flow rates of tumble direction were increasing according to valve lift increasing and incylinder flow pattern changed to large vortex structure with tumble direction. intake ports with different entry angles have different tumble cen-ters. Tumble eccentricity of intake port with low entry. angle was large, so that the port had rela-tively much angular momentum compared to others which was expected to improve combustion performance.
본문·목차
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UCI(KEPA) : I410-ECN-0101-2009-556-014085823
