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 Experimental and Numerical Investigation of Radial Forces Acting on Centrifugal Pump Impeller

2014 ◽  
Vol 61 (3) ◽  
pp. 445-454 ◽  
Author(s):  
Krzysztof Karaskiewicz ◽  
Marek Szlaga
Keyword(s):  
Centrifugal Pump ◽  
Rectangular Cross Section ◽  
Radial Force ◽  
Axial Thrust ◽  
Pump Impeller ◽  
Ansys Fluent ◽  
Commercial Code ◽  
Radial Forces ◽  
Radial Thrust ◽  
Centrifugal Pump Impeller

Abstract The paper presents the results of measurements and predictions of radial thrust in centrifugal pump with specific speed ns = 26. In the pump tested, a volute with rectangular cross-section was used. The tests were carried out for several rotational speeds, including speeds above and below the nominal one. Commercial code ANSYS Fluent was used for the calculations. Apart from the predictions of the radial force, the calculations of axial thrust were also conducted, and correlation between thrust and the radial force was found. In the range of the measured rotational speeds, similarity of radial forces was checked.

scholarly journals Effect of Blade Outlet Angle on Unsteady Hydrodynamic Force of Closed-Type Centrifugal Pump with Single Blade

2014 ◽  
Vol 2014 ◽  
pp. 1-16 ◽  
Author(s):  
Yasuyuki Nishi ◽  
Junichiro Fukutomi
Keyword(s):  
Centrifugal Pump ◽  
Flow Rate ◽  
Static Pressure ◽  
Hydrodynamic Forces ◽  
Centrifugal Impeller ◽  
Leakage Flow ◽  
Axial Thrust ◽  
Outlet Angle ◽  
Closed Type ◽  
Radial Thrust

Geometrically, the single-blade centrifugal impeller, commonly used today as a sewage pump, is not axially symmetric. For this reason, the static pressure around the impeller fluctuates greatly when the impeller is rotating, and not only the radial thrust but also the axial thrust shows large fluctuations. Therefore, it is extremely important for the improvement of pump reliability to quantitatively grasp these fluctuating hydrodynamic forces. In this study, we investigated the unsteady hydrodynamic forces in a closed-type centrifugal pump with a single blade for different blade outlet angles using a numerical analysis that takes into account both experiment and the leakage flow. The results clearly showed the effect of the blade outlet angle on that act on the impeller. The root-mean-square value of the fluctuating component of the total radial thrust was roughly the same for whichever impeller at low flow rate, but at high flow rates, the value increased for impellers with larger blade outlet angles. Moreover, when the leakage flow rate increased with increasing static pressure around the impeller, such that the rear and front shroud parts were subject to high pressure, the absolute value of the axial thrust on both these parts increased.

Thrust Prediction in Screw-Type Centrifugal Pump

2003 ◽  
Author(s):  
Yasushi Tatebayashi ◽  
Kazuhiro Tanaka ◽  
Toshio Kobayashi
Keyword(s):  
Centrifugal Pump ◽  
Performance Prediction ◽  
Three Dimensional ◽  
Internal Flow ◽  
Safe Operation ◽  
Axial Thrust ◽  
Numerical Result ◽  
Flow Prediction ◽  
Spiral Blade ◽  
Radial Thrust

A screw-type centrifugal pump is a kind of non-clog type pump and has been widely used, for instance, for drainage of rainwater as well as slurries and mud in sewage control systems (Reference to Fig. 1). In order to avoid choking the impeller passage with the congestion of solids, the impeller is designed to have a wide passage whose configuration is screw formed by a three-dimensional spiral blade added to a conical hub cone. The prediction of radial and axial thrust is important and useful information for the safe operation and the impeller design, to say nothing of the internal flow prediction and pump performance prediction. Particularly, the fluctuation of radial and axial thrust in this pump is large because of one blade. Therefore, to predict the thrust correctly is important. In this paper, the radial and axial thrust has been numerically predicted. Especially, the numerical result on the radial thrust is compared with the experimental results. The validity of thrust prediction has been discussed.

Numerical Analysis of the Deterministic Stresses Associated to Impeller-Tongue Interactions in a Single Volute Centrifugal Pump

2019 ◽  
Vol 141 (9) ◽  
Author(s):  
J. M. Fernández Oro ◽  
J. González ◽  
R. Barrio Perotti ◽  
M. Galdo Vega
Keyword(s):  
Numerical Analysis ◽  
Numerical Model ◽  
Centrifugal Pump ◽  
Turbulence Intensity ◽  
Three Dimensional ◽  
Relevant Information ◽  
Three Dimensional Flow ◽  
Deterministic Analysis ◽  
Starting Point ◽  
Flow Features

In this paper, a deterministic stress decomposition is applied over the numerical three-dimensional flow solution available for a single volute centrifugal pump. The numerical model has proven in previous publications its robustness to obtain the impeller to volute-tongue flow interaction, and it is now used as starting point for the current research. The main objective has been oriented toward a detailed analysis of the lack of uniformity in the flow that the volute tongue promotes on the blade-to-blade axisymmetric pattern. Through this analysis, the fluctuation field may be retrieved and main interaction sources have been pinpointed. The results obtained with the deterministic analysis become of paramount interest to understand the different flow features found in a typical centrifugal pump as a function of the flow rate. Moreover, this postprocessing tool provides an economic and easy procedure for designers to compare the different deterministic terms, also giving relevant information on the unresolved turbulence intensity scales. Complementarily, a way to model the turbulent effects in a systematic way is also presented, comparing their impact on the performance with respect to deterministic sources in a useful framework, that may be applied for similar kinds of pumps.

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
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