The Effect of Header and Channel Angle Variation on Two-Phase Flow Distribution at Multiple Junctions
헤더-채널 분기관의 각도변화가 2상 유동 분배에 미치는 영향에 대한 연구

Jun Kyoung Lee
2015 Korean Journal of Air-Conditioning and Refrigeration Engineering  
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 16 mm ×16 mm and 12 mm×1.8 mm, 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
more » ... orizontal 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.
doi:10.6110/kjacr.2015.27.11.559 fatcat:sceb4o5ubbcrnolhskwt6ez3ni