On centrifugal pumps

Multi-criteria Optimization of the Flow of a Centrifugal Pump on Energy and Vibroacoustic Characteristics

The present study focuses on the development of methods for design calculation and optimization of the circulatory support pump flowpath. The object of this study is the flowpath of an axial flow pump consisting of a straightener, an impeller, and a diffuser. The working fluid has constant density and viscosity that are close to the physiological parameters of blood of a healthy human. The fluid is considered to be incompressible; the flow is considered steady. Red blood cells in the stream are simulated with non-interacting spherical particles whose trajectories are considered as the trajectories of movement of red blood cells. Equivalent shear stress is calculated at each point of the particle trajectory. The damage parameter is calculated based on the current level of the equivalent shear stress and the time of exposure to shear stress. The criteria of maximum efficiency and minimal hemolysis are used as the optimization criteria. The flowpath is optimized according to these two criteria and local optimum parameters for the suggested initial geometry are determined.

Minimization of Hemolysis and Improvement of the Hydrodynamic Efficiency of a Circulatory Support Pump by Optimizing the Pump Flowpath

Influence of Blade Number on Flow-induced Noise of Centrifugal Pump Based on CFD/CA

The effect of design parameters of the closed type regenerative pump the energy characteristics

Amathematical model is presented for two-phase flow in a pump station. The model is based on three-dimensional non-steady-state Reynolds equations. Turbulence is modeled using the standard k-ω SST model. Two-phase flow is calculated by the VOF method. Analyses of liquid behavior are presented under different initial liquid levels in the station. A optimum value for the initial liquid level is obtained. Areas of vortex formation are shown when the liquid level deviates from the recommended value. The effectiveness of the given pump station design is confirmed.

Numerical Modeling of Liquid Flow in a Pump Station

The present study focuses on the influence of the circulatory support pump wet part geometry on the level of damage experienced by blood cells in it. The object of the study is a centrifugal pump: axial input, impeller and volute. The values of density and viscosity are constant and are close to the physiological parameters of blood of a healthy human. In order to estimate hemolysis blood cells are considered as spherical particles, which do not interact with each other. At each point of the trajectory of the particle equivalent shear stress is calculated according to Huber-Mises criterion. Hemolysis is then calculated in accordance with Lagrangian approach to particle movement in a flow. As an experimental hemolysis curve a power law of equivalent shear stress depending on the time the particle has experienced this stress was chosen. For a wet part optimization criterion of maximum efficiency and minimum hemolysis are considered.

https://iopscience.iop.org/article/10.1088/1757-899X/492/1/012013/pdf

V Lomakin

Papers

Multi-criteria Optimization of the Flow of a Centrifugal Pump on Energy and Vibroacoustic Characteristics

Minimization of Hemolysis and Improvement of the Hydrodynamic Efficiency of a Circulatory Support Pump by Optimizing the Pump Flowpath

Numerical Modeling of Liquid Flow in a Pump Station

Investigation of the influence of centrifugal pump wet part geometry on hemolysis index

Development and research of hydraulic disk pump