Journal
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART A-JOURNAL OF POWER AND ENERGY
Volume 236, Issue 8, Pages 1500-1517Publisher
SAGE PUBLICATIONS LTD
DOI: 10.1177/09576509221094951
Keywords
Centrifugal pump; impeller; volute; impeller-volute interaction; flow instability; reynolds-averaged navier-stokes analysis
Categories
Ask authors/readers for more resources
The study investigates the effects of the number of blades on the impeller-volute interaction and flow instability in a centrifugal pump. Numerical simulations and experimental data are used to analyze the fluctuations in performance parameters and local pressure caused by different blade numbers.
Effects of the number of blades on the impeller-volute interaction and flow instability were studied for a centrifugal pump. The hydraulic performance and time-dependent flow field were analyzed by using the unsteady three-dimensional Reynolds-averaged Navier-Stokes equations with the k-omega based shear stress transport turbulence model. The grid dependence and temporal resolution were tested to evaluate the numerical uncertainties, and the numerical results were validated using experimental data. As the performance parameters, the stage total-to-static head coefficient, the impeller total-to-static head coefficient, and the volute static pressure recovery coefficient were selected to classify the cause of the impeller-volute interaction and flow instability observed inside components. Using the fast Fourier transform, fluctuations of the performance parameters were divided into three categories: the blade passing frequency and its harmonic frequencies, the fluctuations in the broadband frequency region, and the fluctuations in the low-frequency region. The results showed that the fluctuations of the performance parameters and local pressure were affected in various ways by the number of blades. The time-dependent flow structure was investigated to study the root causes of the differences in the impeller-volute interaction and flow instability by the number of blades.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available