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Investigation on Flow Patterns and Transition Characteristics in a Tube-Bundle Channel

[+] Author Affiliations
Guangyao Lu, Guisheng Zhao, Wenyuan Xiang, Huaning Ai

China Nuclear Power Research Institute, Shenzhen, China

Junsheng Ren

China Nuclear Power Engineering Co., Ltd., Shenzhen, China

Paper No. IMECE2009-10675, pp. 1579-1582; 4 pages
doi:10.1115/IMECE2009-10675
From:
  • ASME 2009 International Mechanical Engineering Congress and Exposition
  • Volume 9: Heat Transfer, Fluid Flows, and Thermal Systems, Parts A, B and C
  • Lake Buena Vista, Florida, USA, November 13–19, 2009
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-4382-6 | eISBN: 978-0-7918-3863-1
  • Copyright © 2009 by ASME

abstract

Tube-bundle channels have been widely used in condenser-evaporator and other industrial heat-exchange equipments. The characteristics of two-phase flow patterns and their transitions for refrigerant R-113 through a vertical tube-bundle channel are experimentally investigated using high-speed camera. Experiments show that there are four main flow patterns in the tube-bundle channel, which are bubbly flow, bubbly-churn flow, churn flow and annular flow. And in the same cross-section of tube-bundle channels, it is shown that there might be different flow patterns in different sub-channels. The flow pattern transitions exhibit unsynchronized in different sub-channels. On the basis of experimental research, the flow pattern map is drawn and analyses are made on the comparison of differences between boiling flow patterns in circular tubes and those in tube-bundle channels.

Copyright © 2009 by ASME

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