Discussion: “An Experimental Investigation of Radial Thrust in Centrifugal Pumps” (Agostinelli, A., Nobles, D., and Mockridge, C. R., 1960, ASME J. Eng. Power, 82, pp. 120–125)

1960 ◽  
Vol 82 (2) ◽  
pp. 125-125
Author(s):  
Andre´ Kovats
Keyword(s):  
Experimental Investigation ◽  
Centrifugal Pumps ◽  
Radial Thrust

An Experimental Investigation of Radial Thrust in Centrifugal Pumps

1960 ◽  
Vol 82 (2) ◽  
pp. 120-125 ◽  
Author(s):  
A. Agostinelli ◽  
D. Nobles ◽  
C. R. Mockridge
Keyword(s):  
Experimental Investigation ◽  
Centrifugal Pump ◽  
Graphical Form ◽  
Strain Gages ◽  
Centrifugal Pumps ◽  
Speed Range ◽  
Radial Forces ◽  
Specific Speed ◽  
Radial Thrust

An experimental investigation has been conducted to determine the magnitudes and directions of the unbalanced radial forces on centrifugal pump impellers. The work covers single volutes for a wide specific speed range, double volutes, concentric casings, and modifications of the concentric casing. The results are presented in graphical form and are discussed. A method, making use of strain gages, was devised for determining the magnitudes and directions of the resultant radial forces and is described.

Radial Force on the Impeller of Centrifugal Pumps With Volute, Semivolute, and Fully Concentric Casings

1965 ◽  
Vol 87 (3) ◽  
pp. 319-322 ◽  
Author(s):  
H. Joseph Biheller
Keyword(s):  
Experimental Investigation ◽  
Centrifugal Pump ◽  
Radial Force ◽  
Operating Speed ◽  
Centrifugal Pumps ◽  
Operating Range ◽  
Aspect Ratios ◽  
Radial Forces

An experimental investigation of the magnitude and direction of the unbalanced radial force on centrifugal pump impellers was made. Pumps with single volute, semiconcentric and fully concentric casings of several specific speeds, collector aspect ratios, and with both closed and semiclosed impellers were tested over the full operating range. An equation enabling prediction of expected radial forces based only on pump geometry, operating speed, and capacity (expressed as fraction of capacity at best efficiency) is presented.

scholarly journals Component Analysis of Unsteady Hydrodynamic Force of Closed-Type Centrifugal Pump with Single Blades of Different Blade Outlet Angles

2015 ◽  
Vol 2015 ◽  
pp. 1-17 ◽  
Author(s):  
Yasuyuki Nishi ◽  
Junichiro Fukutomi
Keyword(s):  
Numerical Analysis ◽  
Flow Rate ◽  
Hydrodynamic Force ◽  
Leakage Flow ◽  
Centrifugal Pumps ◽  
Flow Rates ◽  
Outlet Angle ◽  
Closed Type ◽  
Radial Thrust ◽  
Sewage Systems

Single-blade centrifugal impellers for sewage systems undergo both unsteady radial and axial thrusts. Therefore, it is extremely important for the improvement of pump reliability to quantitatively grasp these fluctuating hydrodynamic forces and determine the generation mechanism behind them. In this study, we conducted component analyses of radial and axial thrusts of closed, single-blade centrifugal pumps with different blade outlet angles by numerical analysis while considering leakage flow. The results revealed the effect of the blade outlet angle on the components of radial and axial thrusts. For increased flow rates, the time-averaged values of the pressure component were similar for all impellers, although its fluctuating components were higher for impellers with larger blade outlet angles. Moreover, the fluctuating inertia component of the impeller with a blade outlet angle of 8° decreased as the flow rate increased, whereas those with 16° and 24° angles increased. Therefore, the radial thrust on the hydraulic part was significantly higher for impellers with high blade outlet angles.

Experimental investigation on the flow-induced noise under variable conditions for centrifugal pumps

2012 ◽  
Vol 25 (3) ◽  
pp. 456-462 ◽  
Author(s):  
Shouqi Yuan ◽  
Jun Yang ◽  
Jianping Yuan ◽  
Yin Luo ◽  
Ji Pei
Keyword(s):  
Experimental Investigation ◽  
Centrifugal Pumps ◽  
Flow Induced Noise

scholarly journals Characteristics of Centrifugal Pumps Working in Direct or Reverse Mode: Focus on the Unsteady Radial Thrust

2013 ◽  
Vol 2013 ◽  
pp. 1-11 ◽  
Author(s):  
Anthony Couzinet ◽  
Laurent Gros ◽  
Daniel Pierrat
Keyword(s):  
Numerical Data ◽  
Operating Conditions ◽  
Centrifugal Pumps ◽  
Specific Test ◽  
Pump Operation ◽  
Reverse Mode ◽  
Ansys Cfx ◽  
Test Loop ◽  
Radial Forces ◽  
Radial Thrust

Experimental and numerical investigations have been carried out to study the behaviour of a centrifugal pump operating in direct mode or turbine mode. First of all, the complete characteristics (head, power, and efficiency) were measured experimentally using a specific test loop. The numerical data obtained from a CFD study performed with the ANSYS CFX software and based on steady state and unsteady approaches were compared to the experimental results. The representation in the 4 operating quadrants shows the various operating zones where the head is always positive. Then, the unsteady radial forces were analysed from transient computations. The results obtained for the pump operation are consistent with the literature and extended to the nonnormal operating conditions, namely, for very high flowrate values. The evolution of the radial load during turbine operation is presented for various partial flow operating points.

scholarly journals Variable speed operation of centrifugal pumps running as turbines. Experimental investigation

2019 ◽  
Vol 142 ◽  
pp. 437-450 ◽  
Author(s):  
J. Delgado ◽  
J.P. Ferreira ◽  
D.I.C. Covas ◽  
F. Avellan
Keyword(s):  
Experimental Investigation ◽  
Variable Speed ◽  
Centrifugal Pumps
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