Evaluation of the influence of zigzag roughness on kinemaic flow parameters
https://doi.org/10.26897/1997-6011-2023-3-85-91
Abstract
The research was carried out in order to assess the energy dissipation efficiency of zigzag elements of artificial roughness installed on the spillway face of medium- and low-pressure dams. The flow characteristics were evaluated downstream on a spillway dam model with a free flow entry to the spillway. The experiments were carried out in two stages. The first stage was to measure the flow parameters in the downstream with a smooth spillway face of the dam. The second stage provided for the placement of zigzag elements of artificial roughness in the form of a double zigzag on the spillway face of the dam. Evaluation of the effectiveness of the artificial roughness was carried out by comparing the controlled flow parameters in the same section of the transit section of the spillway from the downstream side with both considered design schemes. It has been established that the device of artificial roughness in the form of a double zigzag on the spillway face of the dam leads to a decrease in the second conjugate flow depth behind the structures and allows creating additional head losses, thereby facilitating measures to dissipate excess flow energy in the downstream. Evaluation of the effectiveness of the artificial roughness was carried out by comparing the controlled flow parameters in the same section of the transit section of the spillway from the downstream side with both considered design schemes. placement of zigzag elements on the water slope. It has been established that the device of artificial roughness in the form of a double zigzag on the spillway face of the dam leads to a decrease in the second conjugate flow depth behind the structures and allows creating a It is shown that the installation of a zigzag roughness on the spillway face of medium- and low-pressure dams changes the kinematic characteristics of the outlet flow and significantly reduces the second conjugate depth, which also favorably affects the parameters of the channel erosion behind the structure, reducing them.
About the Author
L. Kanyarugendo
Russian State Agrarian University – Moscow Agricultural Academy named after C.A. Timiryazev
Russian Federation
Russian Federation
Kanyarugendo Leonidas, PhD student
127434, Moscow, Timiryazevskaya st., 49
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Review
For citations:
Kanyarugendo L. Evaluation of the influence of zigzag roughness on kinemaic flow parameters. Prirodoobustrojstvo. 2023;(3):85-91. (In Russ.) https://doi.org/10.26897/1997-6011-2023-3-85-91
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