• Title/Summary/Keyword: Impinging Spary

Search Result 2, Processing Time 0.024 seconds

Characteristics of a Diesel Spray Impinging on the Hot Plate (고온벽면에 충돌하는 디젤부문의 특성 연구)

  • 문석범;구자예
    • Transactions of the Korean Society of Automotive Engineers
    • /
    • v.7 no.8
    • /
    • pp.55-65
    • /
    • 1999
  • An experimenta investigation of unsteady impinging DI diesel spray on the unheated plate and heated plate has been conducted in a pressurized chamber using high speed shadowgraphy. The ambient agas pressure was varied using nitrogen with chamber pressure of 1.1MPa, 2.1MPa and 2.6MPa. As the increase of ambient gas pressure of ambient gas pressure, the height of spray is increased if entrainment and circulation . At higher temperature of impinging plate, the radial penetration of the impinging spary is incresed , but the height of impinging spray is decreased.

  • PDF

Numerical Analysis of Geometric Effects on Spray Characteristics in Small Direct-injection Diesel Engines (소형디젤기관 내 충돌부의 기구학적 조건에 대한 분무특성의 수치적 해석)

  • 류성목;차건종;김덕줄;박권하
    • Transactions of the Korean Society of Automotive Engineers
    • /
    • v.7 no.5
    • /
    • pp.55-65
    • /
    • 1999
  • Many researches have been investigating small direct-injection diesel engines using the spray impacting on walls. Those systems have one or more raised pips to break-up the fuel and spread it widely toward a desired direction in a combustion chamber. In this study, the sizes and heights of the pips are determined by using a computational fluid dynamics code employing non-orthogonal grid systems. In order to find out the suitable pip-shape to a small chamber, the spray behaviors, occupied spary volumes and averaged droplets sizes are calculated with the variation of shape of the pip, such as, size and heights and inclined degree. The desired shape of the impinging land is proposed for the design of combustion system in small diesel engines.

  • PDF