Investigation of Aerator Flow Pressure Fluctuation Using Detached Eddy Simulation with VOF Method
Publication: Journal of Hydraulic Engineering
Volume 148, Issue 1
Abstract
The detached eddy simulation model and volume of fluid (VOF) method were combined to simulate the pressure fluctuations in the downstream region of an aerator in a spillway tunnel, which often lead to hydraulic structure failure. The predictions were compared to experimental data to validate the model. Satisfactory agreement was obtained between the simulation and experimental results. The root mean square and fluctuation coefficient exhibited single-peak distribution, with the maximum values attained in the impact zone. The ranges of fluctuations of the pressure coefficient in the impact and stable zones were 3.31%–7.08% and 0.96%–3.15%, respectively. The probability density distribution obeyed a normal distribution law and presented a positive skew. The pressure fluctuation characteristics were primarily controlled by large-scale coherent eddies. The flow in the downstream region was a typical low-frequency fluctuation flow. The turbulent kinetic energy spectrum of the flow was congruent with Kolmogorov’s –5/3 law. Our method is convenient for engineers to analyze pressure fluctuation characteristics and propose the shape of a hydraulic structure with superior hydraulic characteristics.
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Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request, including the data of figures and tables in excel format.
Acknowledgments
This research was funded by the Key Research and Development Plan Project of China: Analysis and evaluation of the safety risk of diversion tunnel structure (2019YFB1310504), 2020–2022, Open Research Fund Program of State Key Laboratory of Hydroscience and Engineering (sklhse-2019-B-06), National Natural Science Foundation of China (No. 51979142), and National Natural Science Foundation of China (No. 52009064).
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Journal of Hydraulic Engineering
Volume 148 • Issue 1 • January 2022
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© 2021 American Society of Civil Engineers.
History
Received: Nov 30, 2020
Accepted: Aug 11, 2021
Published online: Oct 22, 2021
Published in print: Jan 1, 2022
Discussion open until: Mar 22, 2022
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