scholarly journals Radial Thrust of Single-Blade Centrifugal Pump

2011 ◽  
Vol 4 (4) ◽  
pp. 387-395 ◽  
Author(s):  
Yasuyuki Nishi ◽  
Junichiro Fukutomi ◽  
Ryota Fujiwara
Keyword(s):  
Centrifugal Pump ◽  
Radial Thrust

3D Quasi-Unsteady Flow Simulation in a Centrifugal Pump: Comparison With the Experimental Results

2004 ◽  
Author(s):  
Miguel Asuaje ◽  
Farid Bakir ◽  
Andres Tremante ◽  
Ricardo Noguera ◽  
Robert Rey
Keyword(s):  
Unsteady Flow ◽  
Centrifugal Pump ◽  
Cfd Simulation ◽  
Pressure Fluctuations ◽  
Pressure Sensors ◽  
Flow Simulation ◽  
Turbulence Models ◽  
Numerical Predictions ◽  
Radial Thrust ◽  
Unsteady Flow Simulation

A 3D-CFD simulation of the impeller and volute casing of a centrifugal pump has been performed using commercial codes CFX 5.5 and CFX-TASCflow 2.12. The pump has an specific speed of 32 (metric units) and an outside impeller diameter of 400 mm. First, a 3D-flow simulation for the isolated impeller with a structured grid is presented. A sensitivity analysis regarding grid quality and turbulence models were also performed. A 3D quasi-unsteady flow simulation of the impeller-volute assembly is presented, as well. This flow simulation was carried out for several impeller blades and volute tongue relative positions. As a result, the radial thrust on the pump shaft were calculated for different flow rates. Experimental test were carried out in order to compare theoretical pressure fluctuations with the experimental ones measured by various unsteady pressure sensors placed on the impeller shroud and volute. The qualitative and quantitative results ratify numerical predictions.

1108 Effect of the Impeller Outlet Angle on Radial Thrust of Single-Blade Centrifugal Pump

2009 ◽  
Vol 2009 (0) ◽  
pp. 357-358
Author(s):  
Yasuyuki NISHI ◽  
Ryota FUJIWARA ◽  
Yoshikado HOTTA ◽  
Junichiro FUKUTOMI ◽  
Toru SHIGEMITSU
Keyword(s):  
Centrifugal Pump ◽  
Outlet Angle ◽  
Impeller Outlet ◽  
Radial Thrust

Radial Thrust of Single-Blade Centrifugal Pump

2011 ◽  
Author(s):  
Yasuyuki Nishi ◽  
Junichiro Fukutomi ◽  
Ryota Fujiwara
Keyword(s):  
Centrifugal Pump ◽  
Flow Rate ◽  
Design Flow ◽  
Centrifugal Impeller ◽  
Cfd Analysis ◽  
Shearing Stress ◽  
Pump Operation ◽  
Grand Total ◽  
Conservation Of Momentum ◽  
Radial Thrust

A single-blade centrifugal pump is widely used as a sewage pump. However, a single-blade is acted on by a large radial thrust during the pump operation because of the geometrical axial asymmetry of the impeller. Therefore to secure the pump reliability, it is necessary to grasp the radial thrust quantitatively and elucidate a behavior and a generation mechanism. This study investigated the radial thrust acting on a single-blade centrifugal impeller by an experiment and a CFD analysis, and the results clearly indicated the following facts. The fluctuating component of the radial thrust increased as the flow rate changed from the design flow rate to a partial or excessive flow rate. Furthermore, the radial thrust was modeled by a combination of three components, inertia, momentum and pressure components by applying unsteady conservation of momentum to this impeller. The grand total of these components was in agreement with the radial thrust calculated by integrating the pressure and the shearing stress on the impeller surface. In addition the behavior of each component was shown and the effects of those components that gave to the radial thrust were clarified. The pressure component had the greatest effect on a time-averaged value and a fluctuating component of the radial thrust. The time-averaged value of the inertia component was approximately 0 even if the flow rate changed. But its fluctuating component had a magnitude nearly comparable to the pressure component at a partial flow rate and slightly decreased with increase of the flow rate.

scholarly journals The Numerical Analysis of Radial Thrust and Axial Thrust in the Screw Centrifugal Pump

2012 ◽  
Vol 31 ◽  
pp. 176-181 ◽  
Author(s):  
Wei Han ◽  
Wei Maa ◽  
Rennian Li ◽  
Qifei Li
Keyword(s):  
Numerical Analysis ◽  
Centrifugal Pump ◽  
Axial Thrust ◽  
Radial Thrust

scholarly journals Numerical Modelization of the Flow in Centrifugal Pump: Volute Influence in Velocity and Pressure Fields

2005 ◽  
Vol 2005 (3) ◽  
pp. 244-255 ◽  
Author(s):  
Miguel Asuaje ◽  
Farid Bakir ◽  
Smaïne Kouidri ◽  
Frank Kenyery ◽  
Robert Rey
Keyword(s):  
Centrifugal Pump ◽  
Cfd Simulation ◽  
Pressure Field ◽  
Flow Simulation ◽  
Turbulence Models ◽  
3D Flow ◽  
Structured Grid ◽  
Pressure Fields ◽  
Pump Shaft ◽  
Radial Thrust

A 3D-CFD simulation of the impeller and volute of a centrifugal pump has been performed using CFX codes. The pump has a specific speed of 32 (metric units) and an outside impeller diameter of 400 mm. First, a 3D flow simulation for the impeller with a structured grid is presented. A sensitivity analysis regarding grid quality and turbulence models were also performed. The final impeller model obtained was used for a 3D quasi-unsteady flow simulation of the impeller-volute stage. A procedure for designing the volute, the nonstructured grid generation in the volute, and the interface flow passage between the impeller and volute are discussed. This flow simulation was carried out for several impeller blades and volute tongue relative positions. As a result, velocity and pressure field were calculated for different flow rates, allowing to obtain the radial thrust on the pump shaft.

J0501-4-6 Radial thrust of Single-Blade Centrifugal pump

2009 ◽  
Vol 2009.7 (0) ◽  
pp. 45-46
Author(s):  
Yoshikado HOTTA ◽  
Ryota FUJIWARA ◽  
Yasuyuki NISHI ◽  
Junichiro FUKUTOMI ◽  
Toru SHIGEMITSU
Keyword(s):  
Centrifugal Pump ◽  
Radial Thrust

scholarly journals Influence of Splitter Blades on the Flow Field of a Centrifugal Pump: Test-Analysis Comparison

2007 ◽  
Vol 2007 ◽  
pp. 1-13 ◽  
Author(s):  
G. Kergourlay ◽  
M. Younsi ◽  
F. Bakir ◽  
R. Rey
Keyword(s):  
Centrifugal Pump ◽  
Dynamic Pressure ◽  
Pressure Fluctuations ◽  
Pressure Sensors ◽  
Navier Stokes ◽  
Test Analysis ◽  
Flow Rates ◽  
Rotating Speed ◽  
Numerical Predictions ◽  
Radial Thrust

This work aims at studying the influence of adding splitter blades on the performance of a hydraulic centrifugal pump. The studied machine is an ENSIVAL-MORET MP 250.200.400 pump (diameter=408 mm, 5 blades, specific speed=32), whose impeller is designed with and without splitter blades. Velocity and pressure fields are computed using unsteady Reynolds-averaged Navier-Stokes (URANS) approach at different flow rates. The sliding mesh method is used to model the rotor zone motion in order to simulate the impeller-volute casing interaction. The flow morphology analysis shows that, when adding splitter blades to the impeller, the impeller periphery velocities and pressures become more homogeneous. An evaluation of the static pressure values all around the impeller is performed and their integration leads to the radial thrust. Global and local experimental validations are carried out at the rotating speed of 900 rpm, for both the original and the splitter blade impellers. The head is evaluated at various flow rates: 50%, 80%, 100%, and 120%of the flow rate at the best efficiency point (BEP). The pressure fluctuations are measured at four locations at the BEP using dynamic pressure sensors. The experimental results match the numerical predictions, so that the effect of adding splitter blades on the pump is acknowledged. Adding splitters has a positive effect on the pressure fluctuations which decrease at the canal duct.

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