Study on the 3D Hydrodynamic Characteristics and Velocity Uniformity of a Gravity Flow Circular Flume
1
Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of Education, College of Environment, Hohai University, Nanjing 210098, China
2
College of Environment, Hohai University, Nanjing 210098, China
3
College of Agricultural Science and Engineering, Hohai University, Nanjing 210098, China
*
Author to whom correspondence should be addressed.
Academic Editor: Helena M. Ramos
Water 2021, 13(7), 927; https://doi.org/10.3390/w13070927
Received: 24 February 2021 / Revised: 12 March 2021 / Accepted: 17 March 2021 / Published: 29 March 2021
(This article belongs to the Section Hydraulics and Hydrodynamics)
Flumes have been widely used in water conservancy science and environmental science research. It is of great significance to obtain the hydrodynamic characteristics and flow field uniformity in the flume. In this study, a new type of annular flume was taken as an example. The 3D flow field was simulated by using a commercial computational fluid dynamics (CFD) code, and was also measured by acoustic doppler velocimeter (ADV) to verify the simulation results. The average relative error range was between 8.37% and 9.95%, the simulated results basically reflected the actual situation of the flow field. On this basis, the structural characteristics of flow field were analyzed. A new calculation method of flow velocity uniformity was presented according to the flow characteristics of natural open channels. The velocity uniformity in the straight channel was calculated and analyzed based on this method, and the influence of speed on the velocity uniformity was further discussed. The length of uniform section was negatively correlated with the rotational speed (average velocity), which was between 39 cm and 101 cm in the straight, and the uniformity coefficient was less than 10%. Finally, the water flow characteristics in the straight channel without wheel were compared with the natural open channel flow. The longitudinal velocity was well fitted with the Prandtl logarithmic distribution formula (R2 > 0.977), and the application feasibility of the flume was analyzed. This study can provide technical support for the development and application of annular flume.
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Keywords:
annular flume; CFD; gravity flow; hydrodynamic characteristics; velocity distribution uniformity
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MDPI and ACS Style
Zhang, Y.; Han, L.; Chen, L.; Wang, C.; Chen, B.; Jiang, A. Study on the 3D Hydrodynamic Characteristics and Velocity Uniformity of a Gravity Flow Circular Flume. Water 2021, 13, 927. https://doi.org/10.3390/w13070927
AMA Style
Zhang Y, Han L, Chen L, Wang C, Chen B, Jiang A. Study on the 3D Hydrodynamic Characteristics and Velocity Uniformity of a Gravity Flow Circular Flume. Water. 2021; 13(7):927. https://doi.org/10.3390/w13070927
Chicago/Turabian StyleZhang, Yi; Han, Longxi; Chen, Lina; Wang, Chenfang; Chen, Bo; Jiang, Anqi. 2021. "Study on the 3D Hydrodynamic Characteristics and Velocity Uniformity of a Gravity Flow Circular Flume" Water 13, no. 7: 927. https://doi.org/10.3390/w13070927
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