Next Article in Journal
Analysis and Anticancer Effects of Active Compounds from Spatholobi Caulis in Human Breast Cancer Cells
Next Article in Special Issue
Study on the Transient Characteristics of the Centrifugal Pump during the Startup Period with Assisted Valve
Previous Article in Journal
Inhibitory Effects of Thymol Isolated from Curcuma longa L. on Adipogenesis in HepG2 Cells
Previous Article in Special Issue
Optimization Design of a Two-Vane Pump for Wastewater Treatment Using Machine-Learning-Based Surrogate Modeling
Open AccessArticle

Numerical Simulation of Axial Vortex in a Centrifugal Pump as Turbine with S-Blade Impeller

School of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou 730050, China
*
Author to whom correspondence should be addressed.
Processes 2020, 8(9), 1192; https://doi.org/10.3390/pr8091192
Received: 18 August 2020 / Revised: 10 September 2020 / Accepted: 11 September 2020 / Published: 20 September 2020
Pump as turbines (PATs) are widely applied for recovering the dissipated energy of high-pressure fluids in several hydraulic energy resources. When a centrifugal pump operates as turbine, the large axial vortex occurs usually within the impeller flow passages. In view of the structure and evolution of the vortex, and its effect on pressure fluctuation and energy conversion of the machine, a PAT with specific-speed 9.1 was analyzed based on detached eddy simulation (DES), and the results showed that vortices generated at the impeller inlet region, and the size and position of detected vortices, were fixed as the impeller rotated. However, the swirling strength of vortex cores changed periodically with double rotational frequency. The influence of vortices on pressure fluctuation of PAT was relatively obvious, deteriorating the operating stability of the machine evidently. In addition, the power loss near impeller inlet region was obviously heavy as the impact of large axial vortices, which was much more serious in low flow rate conditions. The results are helpful to realize the flow field of PAT and are instructive for blade optimization design. View Full-Text
Keywords: energy recovery; pump as turbine; vortex; hydraulic losses; pressure fluctuation energy recovery; pump as turbine; vortex; hydraulic losses; pressure fluctuation
Show Figures

Figure 1

MDPI and ACS Style

Wang, X.; Kuang, K.; Wu, Z.; Yang, J. Numerical Simulation of Axial Vortex in a Centrifugal Pump as Turbine with S-Blade Impeller. Processes 2020, 8, 1192. https://doi.org/10.3390/pr8091192

AMA Style

Wang X, Kuang K, Wu Z, Yang J. Numerical Simulation of Axial Vortex in a Centrifugal Pump as Turbine with S-Blade Impeller. Processes. 2020; 8(9):1192. https://doi.org/10.3390/pr8091192

Chicago/Turabian Style

Wang, Xiaohui; Kuang, Kailin; Wu, Zanxiu; Yang, Junhu. 2020. "Numerical Simulation of Axial Vortex in a Centrifugal Pump as Turbine with S-Blade Impeller" Processes 8, no. 9: 1192. https://doi.org/10.3390/pr8091192

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop