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사각 미니채널 내 공기-물 이상유동 영역 판별 및 압력강하 특성에 관한 실험적 연구
송정연(Jung-Youn Song),신홍철(Hong-Cheol Shin),김성민(Sung-Min Kim) 대한기계학회 2018 대한기계학회 춘추학술대회 Vol.2018 No.12
An air-water two-phase flow experiment is performed to identify the flow patterns and pressure drop characteristics in a 55 cm long rectangular mini-channel with 1.88 mm in width and 5.78 mm in height. A highspeed video camera is used to visualize the two-phase pattern, and differential pressure transducer is used to measure the frictional pressure drop in channel. The experimental data are obtained over a superficial liquid velocity range of 0.018-3.70 m/s and superficial gas velocity range of 0.27-46.47 m/s. Six different flow patterns including the dispersed-annular, smooth-annular, wavy-annular, slug, stratified and transition flow are observed. A flow regime map is constructed with the acquired flow pattern data and compared with previously published flow regime maps. In addition, pressure drop oscillations for different flow patterns are examined to capture dominant flow characteristics of each flow pattern.