Large eddy simulation (LES) is conducted to characterize oxygen dissolution in the draft tube of a pre-designed and optimized modular pump-turbine system. The air injection is applied over the peripheral surface on the draft tube. Mixture multiphase model is used to predict the spatial and temporal distribution of the air and the water. The simulation is conducted at the best efficiency point with a Reynolds number of 1.06 × 107 which is based on the rotation speed and the reference diameter of the runner. The vorticity is suppressed inside the draft tube, and the standard deviation of the power generation is decreased roughly 70% after aeration. The power generation is reduced by approximately 4–5% with peripheral aeration. Almost uniform dissolved oxygen concentration of 2–3 mg/l is observed in the radial direction near the outlet which is more than sufficient for wastewater treatment process.
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ASME 2018 International Mechanical Engineering Congress and Exposition
November 9–15, 2018
Pittsburgh, Pennsylvania, USA
Conference Sponsors:
- ASME
ISBN:
978-0-7918-5210-1
PROCEEDINGS PAPER
Large Eddy Simulation of Ventilated Pump-Turbine for Wastewater Treatment
Cosan Daskiran,
Cosan Daskiran
Lehigh University, Bethlehem, PA
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Bashar Attiya,
Bashar Attiya
Lehigh University, Bethlehem, PA
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Muhannad Altimemy,
Muhannad Altimemy
Lehigh University, Bethlehem, PA
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Alparslan Oztekin
Alparslan Oztekin
Lehigh University, Bethlehem, PA
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Cosan Daskiran
Lehigh University, Bethlehem, PA
Bashar Attiya
Lehigh University, Bethlehem, PA
Muhannad Altimemy
Lehigh University, Bethlehem, PA
I-Han Liu
Lehigh University, Bethlehem, PA
Alparslan Oztekin
Lehigh University, Bethlehem, PA
Paper No:
IMECE2018-86330, V007T09A006; 8 pages
Published Online:
January 15, 2019
Citation
Daskiran, C, Attiya, B, Altimemy, M, Liu, I, & Oztekin, A. "Large Eddy Simulation of Ventilated Pump-Turbine for Wastewater Treatment." Proceedings of the ASME 2018 International Mechanical Engineering Congress and Exposition. Volume 7: Fluids Engineering. Pittsburgh, Pennsylvania, USA. November 9–15, 2018. V007T09A006. ASME. https://doi.org/10.1115/IMECE2018-86330
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