Measurement System of Bubbly Flow Using Ultrasonic Velocity Profile Monitor and Video Data Processing Unit, (III). Comparison of Flow Characteristics between Bubbly Cocurrent and Countercurrent Flows.
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- ZHOU Shirong
- Tokyo Institute of Technology
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- SUZUKI Yumiko
- Tokyo Institute of Technology
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- ARITOMI Masanori
- Tokyo Institute of Technology
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- MATSUZAKI Mitsuo
- Tokyo Institute of Technology
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- TAKEDA Yasushi
- Paul Scherrer Institut
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- MORI Michitsugu
- Tokyo Electric Power Co.
Bibliographic Information
- Other Title
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- Measurements System of Bubbly Flow Using Ultrasonic Velocity Profiles Monitor and Video Data Processing Unit,(3)Comparison of Flow Characteristics between Bubbly Cocurrent and Countercurrent Flows
- Measurements System of Bubbly Flow Usin
- Comparison of Flow Characteristics between Bubbly Cocurrent and Countercurrent Flows
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Abstract
The authors have developed a new measurement system which consisted of an Ultrasonic Velocity Profile Monitor (UVP) and a Video Data Processing Unit (VDP) in order to clarify the two-dimensional flow characteristics in bubbly flows and to offer a data base to validate numerical codes for two-dimensional two-phase flow. In the present paper, the proposed measurement system is applied to fully developed bubbly cocurrent flows in a vertical rectangular channel. At first, both bubble and water velocity profiles and void fraction profiles in the channel were investigated statistically. In addition, the two-phase multiplier profile of turbulence intensity, which was defined as a ratio of the standard deviation of velocity fluctuation in a bubbly flow to that in a water single phase flow, were examined. Next, these flow characteristics were compared with those in bubbly countercurrent flows reported in our previous paper. Finally, concerning the drift flux model, the distribution parameter and drift velocity were obtained directly from both bubble and water velocity profiles and void fraction profiles, and their results were compared with those in bubbly countercurrent flows.
Journal
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- Journal of Nuclear Science and Technology
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Journal of Nuclear Science and Technology 35 (5), 335-343, 1998
Atomic Energy Society of Japan
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Details 詳細情報について
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- CRID
- 1390001204096083968
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- NII Article ID
- 10002079379
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- NII Book ID
- AA00703720
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- COI
- 1:CAS:528:DyaK1cXktFWku7g%3D
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- ISSN
- 18811248
- 00223131
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- NDL BIB ID
- 4474205
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed