Three-dimensional coupled impeller-volute simulation of flow in centrifugal pump and performance prediction

2006 ◽  
Vol 19 (01) ◽  
pp. 59 ◽  
Author(s):  
Binjuan ZHAO
Keyword(s):  
Centrifugal Pump ◽  
Performance Prediction ◽  
Three Dimensional ◽  
And Performance

Relationship Between Flow Instability and Performance of a Centrifugal Pump With a Volute

2020 ◽  
Vol 142 (11) ◽  
Author(s):  
Hyeon-Seok Shim ◽  
Kwang-Yong Kim
Keyword(s):  
Centrifugal Pump ◽  
Numerical Solutions ◽  
Flow Instability ◽  
Pressure Fluctuations ◽  
Three Dimensional ◽  
Performance Characteristics ◽  
Recovery Coefficient ◽  
Partial Load ◽  
And Performance ◽  
Static Head

Abstract Flow instability and its correlations with performance characteristics were investigated for a centrifugal pump with a volute. Unsteady three-dimensional Reynolds-averaged Navier–Stokes analysis was performed to analyze the flow and performance characteristics using the shear stress transport (SST) turbulence model. The grid dependence and temporal resolution were tested to evaluate the numerical uncertainties, and the numerical solutions were validated using experimental data. The total-to-static head coefficient, the impeller's total-to-static head coefficient, and the volute static pressure recovery coefficient were selected as performance parameters. To identify the flow instability, pressure fluctuations were monitored upstream of the impeller, at the volute inlet, and on the shroud wall of the impeller. Three different types of flow instability were detected in partial-load conditions: inside the volute, upstream of the impeller, and at the interface between the impeller and volute. The time-dependent flow structures were investigated to obtain insight into the onset of the flow instability. The correlation of the onset of the flow instability with the performance curves was discussed.

Effects of Different Turbulence Models on Three-Dimensional Unsteady Cavitating Flows in the Centrifugal Pump and Performance Prediction

2019 ◽  
Vol 20 (3-4) ◽  
pp. 487-509 ◽  
Author(s):  
Ahmed Ramadhan Al-Obaidi
Keyword(s):  
Centrifugal Pump ◽  
Turbulence Model ◽  
Three Dimensional ◽  
Turbulence Models ◽  
Experimental Results ◽  
Centrifugal Pumps ◽  
Operation Condition ◽  
Sst Model ◽  
And Performance ◽  
Turbulent Models

AbstractIn centrifugal pumps, it is important to select appropriate turbulence model for the numerical simulation in order to obtain reliable and accurate results. In this work, ten turbulence models in 3-D transient simulation for the centrifugal pump are chosen and compared. The pump performance is validated with experimental results. The numerical results reveal that the SST turbulence model was closer to the experimental results in predicting head. In addition, the pressure variation trend for the ten models is very similar which increases and then decreases from the inlet to outlet of the pump along the streamline. The SST k-ω model predicts the performance of the pump was more accurately than other turbulent models. Furthermore, the results also found that the error is the least at design operation condition 300(l/min), which is around 1.98 % for the SST model and 2.14 % and 2.38 % for the LES and transition omega model. Within 7.61 %, the errors at higher flow rate 350(l/min) for SST. The error for SST model is smaller as compared to different turbulent models. For the Realizable k-ɛ model, the errors fluctuate were more high than other models.

Design and Performance Prediction of Centrifugal Impellers

1996 ◽  
Vol 210 (6) ◽  
pp. 463-476 ◽  
Author(s):  
Y Wang ◽  
S Komori ◽  
Z Xu
Keyword(s):  
Boundary Layer ◽  
Performance Prediction ◽  
Three Dimensional ◽  
Axial Direction ◽  
Centrifugal Impeller ◽  
Angle Distribution ◽  
Simple Method ◽  
Viscous Loss ◽  
Compressor Impeller ◽  
And Performance

This study presents a simple method for designing the blade geometry of a centrifugal compressor impeller. In this method, instead of giving the mean swirl distribution on the meridional surface, the blade angle distribution is specified and the blade shape is derived, making it easier to perform the design. The quasi-three-dimensional potential flow field inside the impeller is obtained using the streamline curvature method, which solves the Euler equation along arbitrary quasi-orthogonals. The viscous effect is incorporated indirectly into the inverse design of the impeller via the simplified three-dimensional boundary layer calculation and the performance prediction. A three-dimensional centrifugal impeller was designed using this inviscid-viscous method and eventually manufactured. The newly designed impeller (B) and another impeller (A) designed previously were tested on a standard apparatus for model impellers. With the aid of three-hole probes and thermocouples, the flow parameters downstream of the exit of the impellers were measured along the axial direction of the impellers. A viscous loss model related to the boundary parameters is developed and used for the performance predictions of the impellers together with other loss models. From both the boundary layer analysis and the performance prediction, it is concluded that impeller B is superior to impeller A, which is in close accordance with the measurements.

Analysis of Numerical Simulation and Performance Prediction in Centrifugal Pump for Warship

2014 ◽  
Vol 608-609 ◽  
pp. 66-70
Author(s):  
Jun Wang
Keyword(s):  
Numerical Simulation ◽  
Centrifugal Pump ◽  
Curve Fitting ◽  
Performance Test ◽  
High Reliability ◽  
Three Dimensional ◽  
Testing System ◽  
Flow Pressure ◽  
And Performance ◽  
Test Process

Through the ship flow field of centrifugal pump that can be numerical simulation of three-dimensional turbulent, the paper reveals the pump flow pressure and velocity distribution. It also introduces the function of hardware and module testing system, according to the centrifugal pump performance test data, to achieve the minimum two multiplication curve fitting module using VC programming, curve fitting for the transformed data, the results show that the system is running stable, and convenient operation in the test process, simple maintenance and high reliability.

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.

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