Effects of rib geometry on two-phase slug flow = 립 구조가 이상 슬러그 유동에 미치는 영향

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Rib geometries are of interest in a variety of gas-liquid two-phase flow applications. Slug flow is one of the most prevalent but problematic two-phase flow pattern in industrial applications as it involves severe pressure fluctuation. In this study, the effects of rib geometry on pressure fluctuation and slug frequency, which are the main characteristics of the slug flow, were investigated, and the effects on controlling the slugging phenomenon is introduced. The characteristics of the slug flow vary greatly with time, so a careful statistical method was applied to grasp the effect of the lip structure. Regardless of the dimension of the rib geometry, the pressure fluctuation of the slug flow is generally weakened in the ribbed channel and the main frequency disappears. It was also confirmed by flow visualization that this phenomenon was caused by small air bubbles generated by the rib geometry. Depending on the width-to-height ratio of the rib geometry, the mechanism by which these phenomena occur was different, and the level of mitigation effect on slugging was different accordingly.
Advisors
Kim, Daegyoumresearcher김대겸researcher
Description
한국과학기술원 :기계공학과,
Publisher
한국과학기술원
Issue Date
2020
Identifier
325007
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 기계공학과, 2020.8,[iii, 23 p. :]

Keywords

Two-phase flow▼aRib geometry▼aSlug flow▼aPressure fluctuation▼aStatistical analysis; 이상 유동▼a립 구조▼a슬러그 유동▼a압력 맥동▼a통계적 분석

URI
http://hdl.handle.net/10203/284943
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=925102&flag=dissertation
Appears in Collection
ME-Theses_Master(석사논문)
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