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서지반출
Branching of two-phase flow from a vertical header to horizontal parallel channels
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  • Branching of two-phase flow from a vertical header to horizontal parallel channels
  • Branching of two-phase flow from a vertical header to horizontal parallel channels
저자명
Lee. Jun-Kyoung
간행물명
Journal of mechanical science and technology
권/호정보
2009년|23권 6호|pp.1628-1636 (9 pages)
발행정보
대한기계학회
파일정보
정기간행물|ENG|
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이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
서지반출

기타언어초록

The objective of the present experimental work is to investigate the two-phase flow distribution from a vertical main to parallel horizontal branches. Both the main and the branches have rectangular cross-sections simulating the header and the channels of the compact heat exchangers for air-conditioning systems. The cross section of the main is 8 mm ${ imes}$ 8 mm while that of the parallel branches is 8 mm ${ imes}$ 1 mm. Here, the second (downstream) junction was taken as the reference. The effect of the distance between the branches was mainly examined by changing it from 9 mm to 49 mm for the given flow conditions at the inlet of the downstream junction. Air and water were used as the test fluids. The superficial velocity ranges of air and water at the test section inlet were 13.2 - 21.4 m/s and 0.08 - 0.28 m/s, respectively. When the branch spacing becomes smaller, the fraction of liquid separation through the downstream branch decreases. The trend remains the same over the entire range of the present experiment, i.e., for different values of quality and the mass flow rate at the inlet of the downstream junction. Based on the correlation for single T-junctions, a modified correlation was proposed to take into account the effect of the branch distance in predicting the fraction of liquid separation. The correlation represents the experimental results within the accuracy of ${pm}$ 15 %.