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국내 최대 기계 및 로봇 연구정보
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  • 국내학술지

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    국내학술지 제목 게시판 내용
    제목(국문) 팽창률이 일정한 노즐을 사용한 AIR-KNIFE 유동에 관한 연구
    제목(영문) A STUDY ON THE FLOW CHARACTERISTICS OF AIR-KNIFE USING A CONSTANT EXPANSION RATE NOZZLE
    저자 이동원 (Dong-Won Lee ,(주)STX엔진 ) ▷공저자네트워크등록하기
    강남철 (Nam-Cheol Kang ,경북대학교 ) ▷공저자 네트워크 보기
    김근영 (Guen-Young KIm ,POSCO ) ▷공저자네트워크등록하기
    권영두 (Young-Doo Kwon ,경북대학교 ) ▷공저자 네트워크 보기
    권순범 (Soon-Bum Kwon ,경북대학교 ) ▷공저자네트워크등록하기
    초록 In the process of continuous hot-dip galvanizing, it is well known that the gas wiping through an air knife
    system is most effective because of its uniformity in coating thickness, possibility of thin coating, workability in high
    speed, and simplicity of control. However, gas wiping used in the galvanizing process brings about a problem oj
    splashing at the strip edge above a certain high speed of process. It is also known that the problem of edge
    splashing is more harmful than that at the mid strip surface. For a given liquid(of a certain viscosity and surface
    tension), the onset of splashing mainly depends upon the strip velocity, the gas-jet pressure, and the nozzle's
    stand-off distance. In these connections in the present study, we proposed three kinds of air knife system having
    nozzles of constant expansion rate, and compared the jet structures issuing from newly proposed nozzle systems with
    the result by a conventional one. In numerical analysis, the governing equations are consisted of two-dimensional
    time dependent Navier-Stokes equations, and the standard k-E: turbulence model is employed to solve turbulence
    stress and so on. As the result, it is found that we had better use the constant expansion-rate nozzle which can be
    interpreted from the point view of the energy saving for the same coating thickness. Also, we better reduce the size
    of separation bubble and enhance the cutting ability at the strip surface, by using an air-knife having constant
    expansion-rate nozzle.
    keyword 가스 와이핑(Gas Wiping), 에어 나이프(Air-Knife), 응용 아연 도금(Hot-dip Galvanizing), 충돌 제트(Impinging Jet)
    저널명 한국전산유체공학회지 ▷관련저널보기
    VOL 13
    PAGE 1-7
    발표년도 2008
    원문파일 국문다운로드
    • 페이스북아이콘
    • 트위터 아이콘

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