TY - GEN
T1 - Large eddy simulation of ventilated pump-turbine for wastewater treatment
AU - Daskiran, Cosan
AU - Attiya, Bashar
AU - Altimemy, Muhannad
AU - Liu, I. Han
AU - Oztekin, Alparslan
N1 - Funding Information:
This work used the computational resources of the Extreme Science and Engineering Discovery Environment (XSEDE) through the National Science Foundation grant (TG-CTS170051). Specifically, the Bridges system at the Pittsburgh Supercomputing Center (PSC) is used for simulations.
Funding Information:
This work used the computational resources of the Extreme Science and Engineering Discovery Environment (XSEDE) through the National Science Foundation grant (TGCTS170051). Specifically, the Bridges system at the Pittsburgh Supercomputing Center (PSC) is used for simulations.
Publisher Copyright:
Copyright © 2018 ASME.
PY - 2018
Y1 - 2018
N2 - 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 1.06×10 7 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.
AB - 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 1.06×10 7 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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U2 - 10.1115/IMECE201886330
DO - 10.1115/IMECE201886330
M3 - Conference contribution
AN - SCOPUS:85060367369
T3 - ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)
BT - Fluids Engineering
PB - American Society of Mechanical Engineers (ASME)
T2 - ASME 2018 International Mechanical Engineering Congress and Exposition, IMECE 2018
Y2 - 9 November 2018 through 15 November 2018
ER -