• 제목/요약/키워드: 정상류 유동 실험 설비

검색결과 3건 처리시간 0.019초

중속 디젤엔진의 실린더 헤드포트 유동 특성 실험 연구 (An Experimental Study of the Flow Characteristics of Cylinder Head Port for Medium-Speed Diesel Engines)

  • 김진원;갈상학
    • 대한기계학회:학술대회논문집
    • /
    • 대한기계학회 2001년도 춘계학술대회논문집D
    • /
    • pp.790-795
    • /
    • 2001
  • Since the characteristics of combustion and pollutant in Diesel engines were mainly affected by the characteristics of in-cylinder gas flow and fuel spray, an understanding of those was essential to the design of the D.I. Diesel engines. The improvement of volumetric efficiency of air charging into combustion chamber is a primary requirement to obtain better mean effective pressure of an engine. Since the air resistances in intake and exhaust flow passages, valve lift and valve shape influence greatly to the volumetric efficiency, it is very important to investigate the flow characteristics of intake and exhaust port which develops air motion in the combustion chamber. This paper presents the results of an experimental investigation of steady flow through the various kinds of commercial cylinder head ports, and the development procedures of HHI's H21/32 prototype cylinder head ports.

  • PDF

이온화식 연기감지기의 기류응답특성 연구 (A Study on Response Characteristics of ionization Smoke Detector Influenced by Air Stream)

  • 이복영;정길순;이병곤
    • 한국화재소방학회논문지
    • /
    • 제17권2호
    • /
    • pp.6-9
    • /
    • 2003
  • 공조설비에 의한 실내기류 유동특성은 정상해석에 의해 설치되는 화재감지기의 예상 응답특성과 다른 기류 유동특성을 나타내어 기류변화에 따른 이온화식 연기감지기의 응답특성지연을 규명, 성능위주의 화재감지설비 설계를 위한 기반기술 연구를 수행하였다. 실험은 일정한 연기농도를 가진 기류의 풍속을 변화시켜 이온화식 연기감지기의 기류응답특성을 규명하였다. 실험결과 이온화식 연기감지기의 응답특성은 기류속도와 반비례적인 관계가 있으며 기류속도가 60 cm/s 이상인 경우 응답특성이 예민하게 나타났다. 또한, 석유화학제품의 연소에 의한 연기에 비해 종이류의 훈소화재에 예민한 응답특성을 보이는 것으로 나타났다.

현대 H21/32 중속 디젤엔진 실린더 헤드포트 최적화 연구 (A Study on the Optimization of Cylinder Head Port Flow for Hyundai H21/32 Medium-Speed Diesel Engines)

  • 김병윤;김진원;갈상학
    • 대한기계학회:학술대회논문집
    • /
    • 대한기계학회 2001년도 추계학술대회논문집B
    • /
    • pp.806-811
    • /
    • 2001
  • Since the characteristics of combustion and pollutant in Diesel engines were mainly effected by the characteristics of in-cylinder gas flow and fuel spray, an understanding of those was essential to the design of the D.I. Diesel engines. The improvement of volumetric efficiency of air charging into combustion chamber is a primary requirement to obtain better mean effective pressure of an engine. Since parameters such as the air resistances in intake and exhaust flow passages, valve lift and valve shape influence greatly to the volumetric efficiency, it is very important to investigate the flow characteristics of intake and exhaust port which develops air motion in the combustion chamber. In this study, two approach methods were used for design intake and exhaust port; experiment and computation which were made by using steady flow test rig and commercial CFD code. This paper presents the results of an experimental and analytical investigation of steady flow through the prototype cylinder head ports and valves of the HHI's H21/32 HIMSEN Engine.

  • PDF