The Effect of Header and Channel Angle Variation on Two-Phase Flow Distribution at Multiple Junctions

Title & Authors
The Effect of Header and Channel Angle Variation on Two-Phase Flow Distribution at Multiple Junctions
Lee, Jun Kyoung;

Abstract
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 $\small{16mm{\times}16mm}$ and $\small{12mm{\times}1.8mm}$, 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.
Keywords
Language
Korean
Cited by
1.
Recent Progress in Air-Conditioning and Refrigeration Research : A Review of Papers Published in the Korean Journal of Air-Conditioning and Refrigeration Engineering in 2015, Korean Journal of Air-Conditioning and Refrigeration Engineering, 2016, 28, 6, 256
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