Effects of Diameters on Countercurrent Flow Limitation at a Square Top End in Vertical Pipes
Joint Authors
Tomiyama, Akio
Nishida, Koji
Torige, Toshihide
Takaki, Toshiya
Goda, Raito
Murase, Michio
Source
Science and Technology of Nuclear Installations
Issue
Vol. 2018, Issue 2018 (31 Dec. 2018), pp.1-11, 11 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2018-12-02
Country of Publication
Egypt
No. of Pages
11
Abstract EN
The falling liquid flow rate under flooding conditions is limited at a square top end of a vertical pipe in the pressurizer surge line with the diameter of about 300 mm that consists of a vertical pipe, a vertical elbow, and a slightly inclined pipe with elbows.
In this study, therefore, we evaluated effects of diameters on countercurrent flow limitation (CCFL) at the square top end in vertical pipes by using existing air-water data in the diameter range of D = 19-250 mm.
As a result, we found that there was a strong relationship between the constant CK and the slope m in the Wallis-type correlation where the Kutateladze parameters were used for the dimensionless gas and liquid velocities.
The constant CK and the slope m increased when the water level is increased in the upper tank h.
CCFL at the square top end of the vertical pipes could be expressed by the Kutateladze parameters with CK = 1.53±0.11 and m = 0.97 for D ≥ 30 mm.
The CK values were smaller for D = 19-25 mm than those for D ≥ 30 mm.
American Psychological Association (APA)
Murase, Michio& Nishida, Koji& Torige, Toshihide& Takaki, Toshiya& Goda, Raito& Tomiyama, Akio. 2018. Effects of Diameters on Countercurrent Flow Limitation at a Square Top End in Vertical Pipes. Science and Technology of Nuclear Installations،Vol. 2018, no. 2018, pp.1-11.
https://search.emarefa.net/detail/BIM-1214887
Modern Language Association (MLA)
Murase, Michio…[et al.]. Effects of Diameters on Countercurrent Flow Limitation at a Square Top End in Vertical Pipes. Science and Technology of Nuclear Installations No. 2018 (2018), pp.1-11.
https://search.emarefa.net/detail/BIM-1214887
American Medical Association (AMA)
Murase, Michio& Nishida, Koji& Torige, Toshihide& Takaki, Toshiya& Goda, Raito& Tomiyama, Akio. Effects of Diameters on Countercurrent Flow Limitation at a Square Top End in Vertical Pipes. Science and Technology of Nuclear Installations. 2018. Vol. 2018, no. 2018, pp.1-11.
https://search.emarefa.net/detail/BIM-1214887
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1214887