Research on the Normal Use of a Plug Discharge Tunnel
Joint Authors
Tian, Zhong
Liu, Wen
Deng, Jun
Zhang, Faxing
Source
Mathematical Problems in Engineering
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-12, 12 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-02-12
Country of Publication
Egypt
No. of Pages
12
Main Subjects
Abstract EN
This study analyzed the normal use of an unusual flood-releasing tunnel with a plug dissipator.
Firstly, normal physical model tests based on the Froude criterion (1 : 50) were finished.
Secondly, depression physical model tests based on the Froude criterion (1 : 50) and cavitation similarity criterion were finished.
Thirdly, 3-dimensional numerical simulation of flow field was finished, and free surface profile was captured, which was based on RNG k-ε two-equation turbulence model and VOF method.
The focus of this study is on the relationship between normal use and cavitation characteristics (e.g., pressure, turbulence kinetic energy, and cavitation number).
The results show that lowering the reservoir water level, reduced by 20.41 m at most, increases the risk of cavitation of a plug discharge tunnel, which means with the decrease of the flow cavitation number, the possibility of structural damage will increase dramatically, while reducing the outlet height can effectively raise the flow cavitation number, ensuring the safety of normal use.
Under the conditions of free outflow, for the H1/e values of 4.45, 4.00, and 3.55, the conditions in which the tunnel meets the requirements of anticavitation are h/D ≤ 0.42, h/D ≤ 0.39, and h/D ≤ 0.35, respectively.
In addition, the discharge capacity of the tunnel is not significantly reduced with the lowering of outlet height, implying that operation under a low water head of the plug discharge tunnel, as low as 3.55 of H1/e in the test, is feasible.
The results obtained in this study can serve as reference information in engineering design of the plug discharge tunnel.
American Psychological Association (APA)
Liu, Wen& Deng, Jun& Tian, Zhong& Zhang, Faxing. 2020. Research on the Normal Use of a Plug Discharge Tunnel. Mathematical Problems in Engineering،Vol. 2020, no. 2020, pp.1-12.
https://search.emarefa.net/detail/BIM-1195251
Modern Language Association (MLA)
Liu, Wen…[et al.]. Research on the Normal Use of a Plug Discharge Tunnel. Mathematical Problems in Engineering No. 2020 (2020), pp.1-12.
https://search.emarefa.net/detail/BIM-1195251
American Medical Association (AMA)
Liu, Wen& Deng, Jun& Tian, Zhong& Zhang, Faxing. Research on the Normal Use of a Plug Discharge Tunnel. Mathematical Problems in Engineering. 2020. Vol. 2020, no. 2020, pp.1-12.
https://search.emarefa.net/detail/BIM-1195251
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1195251