서지주요정보
단부 과도금 원인해소를 위한 단부 와류유동과 Marangoni 대류 분석 = Analysis of vortex structure in the vicinity of strip edge and marangoni convection in order to overcome edge over coating
서명 / 저자 단부 과도금 원인해소를 위한 단부 와류유동과 Marangoni 대류 분석 = Analysis of vortex structure in the vicinity of strip edge and marangoni convection in order to overcome edge over coating / 김상준.
저자명 김상준 ; Kim, Sang-Joon
발행사항 [대전 : 한국과학기술원, 2003].
Online Access 원문보기 원문인쇄

소장정보

등록번호

8014669

소장위치/청구기호

학술문화관(문화관) 보존서고

DME 03048

SMS전송

도서상태

이용가능

대출가능

반납예정일

초록정보

In order to ascertain the mechanism of the edge over-coating (EOC) developed near the edge of a galvanized steel strip, the effects of surface tension (Marangoni convection) and flow structure in the vicinity of strip edge are analyzed. The temperature gradient of molten zinc near the strip edge is calculated and the accumulation of zinc on the strip edge region due to the surface tension difference is estimated by solving the momentum equation of free surface. About 10% of the EOC is attributed to the Marangoni convection. The oscillation frequency of opposed impinging plane jets is measured by CTA for the range of 300<$Re_j$<13,000. The 3-D flow field with alternating vortices in the region away from the strip edge is also investigated and the distributions of mean impinging pressure and shear stress on the strip surface are obtained by using a commercial 3-D flow analysis code, STAR-CD. It was found that the appearance of alternating vortices causes the surface pressure to decrease gradually approaching the strip edge. The coating thickness is calculated by one integral analysis method of the boundary layer momentum equation. A sample calculation of a benchmark experiment on EOC problem shows that the present analysis method yields a reasonably accurate prediction of EOC for a given plant operating condition and that the alternating vortices are the main cause of EOC.

서지기타정보

서지기타정보
청구기호 {DME 03048
형태사항 iv, 78 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Sang-Joon Kim
지도교수의 한글표기 : 정명균
지도교수의 영문표기 : Myung-Kyoon Chung
수록잡지명 : "Numerical analysis of edge over-coating in continuous hot-dip galvanizing". ISIJ international
학위논문 학위논문(박사) - 한국과학기술원 : 기계공학전공,
서지주기 참고문헌 : p. 42-45
주제 단부 과도금
에어나이프
연속식 용융 아연도금
강판 단부 와동
Marangoni 대류
Edge Over Coating
Air Knife
Continuous Hot-Dip Galvanizing
Strip Edge Vortex
Marangoni Convection
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