헤더-채널 분기관의 각도변화가 2상 유동 분배에 미치는 영향에 대한 연구

• Published in: 설비공학 논문집, 27(11) Vol. 27; no. 11; pp. 559 - 566
• Main Author: 이준경(Jun Kyoung Lee)
• Format: Journal Article
• Language: Korean
• Published: 대한설비공학회 2015
• Subjects: 기계공학; Flow distribution(유동분배); Angle variation(각도변화); Header(헤더); Two-phase(2상); 2
• ISSN: 1229-6422; 2465-7611
• DOI: 10.6110/KJACR.2015.27.11.559

The main objective of this work is to experimentally investigate the effect of angle variation on the distribution of two-phase flow at header-channel junctions. The cross-sections of the header and the channels were fixed at $16mm{\times}16mm$ and $12mm{\times}1.8mm$, respectively. Air and water were used as the test fluids. Four different header-channel positions were tested : Vertical header with Horizontal channels (case VM-HC), Horizontal header with Horizontal channels (case HM-HC), Horizontal header with Vertical Downward channels (case HM-VDC), and Horizontal header with Vertical Upward channels (case HM-VUC). In all cases, liquid flow distribution tended to decrease gradually in the upstream header region. However, in the downstream region, different trends could be seen. The reason for these different tendencies were identified by flow visualization in each case. The standard deviations for the liquid and gas flow distribution in each case were calculated, and the case of VM-HC had the lowest values compared to other cases because of the symmetrically distributed liquid film and strong flow recirculation near the end plate.