The Use of Steady Multi-Phase Position and Unsteady Computational Methods in the Numerical Simulation of Double-Suction Centrifugal Pump

2011 ◽  
Vol 181-182 ◽  
pp. 201-205
Author(s):  
Le Hu ◽  
Shu Jia Zhang ◽  
Cheng Xu
Keyword(s):  
Experimental Data ◽  
Numerical Simulation ◽  
Turbulent Flow ◽  
Centrifugal Pump ◽  
Power Efficiency ◽  
Simulated Performance ◽  
Performance Curves ◽  
Shaft Power ◽  
Unsteady Simulation ◽  
Multi Phase

In order to compare the steady multi-phase and unsteady calculation in double-suction centrifugal pump application, this article simulates the internal turbulent flow of the 150S-50 double suction centrifugal pump. Numerical simulation uses realizable turbulence model, simulating with two methods of steady multi-phase and unsteady in 7 cases. Based on the numerical simulation, the head, shaft power, efficiency were calculated, the simulated performance curves of a double suction centrifugal pump is processed. The results show that: The results of unsteady simulation are closer with the experimental data.

Examine Applicability of the RANS and LES Method on Numerical Simulation of Centrifugal Pump

2011 ◽  
Vol 55-57 ◽  
pp. 582-586
Author(s):  
Shu Jia Zhang ◽  
Yue Ping Tong ◽  
Le Hu
Keyword(s):  
Numerical Simulation ◽  
Large Eddy Simulation ◽  
Centrifugal Pump ◽  
Power Efficiency ◽  
Internal Flow ◽  
Equation Model ◽  
Eddy Simulation ◽  
Simulated Performance ◽  
Large Eddy ◽  
Performance Curves

In order to examine applicability of the Reynolds-Averaged Navier-Stokes （RANS）using Reynolds Stress equation Model (RSM) and the Large Eddy Simulation (LES) in numerical simulation of centrifugal pump, a series of 3D numerical simulation at the design point and at six off-design points were carried out with the two methods. The object is based on IS80-65-160 centrifugal pump. According to the results obtained, head, shaft power, efficiency of pump were calculated, the simulated performance curves of a centrifugal pump is processed. The simulated performance curves of a centrifugal pump were compared with the experimental performance curves. It was confirmed that RANS were suitable for the numerical simulation of the internal flow inside a centrifugal pump. But the result of LES is not very good if the same gambit which is suitable for RANS was used. Therefore, the computer resources, not propose the Large Eddy Simulation (LES) method in numerical simulations of centrifugal pump.

Numerical Simulation of IHF Fluorine Plastic Centrifugal Pump Inner Flow

2014 ◽  
Vol 945-949 ◽  
pp. 1011-1014
Author(s):  
Feng Lian Qi ◽  
Yong Xu Yan ◽  
Wei Zhao ◽  
Shi Qi Cao
Keyword(s):  
Numerical Simulation ◽  
Centrifugal Pump ◽  
Theoretical Basis ◽  
Power Efficiency ◽  
Field Calculation ◽  
Turbulent Model ◽  
Optimizing Design ◽  
Shaft Power ◽  
The Relationship ◽  
Calculation Software

The paper takes the twisted blades of fluorine plastic centrifugal pump as the research object. It used the flow field calculation software Fluent based on average N-S equations and standard k-ε turbulent model, and adopted the method of SIMPLEC algorithms, it conducted the numerical simulation on uncompressed flow of fluorine plastic centrifugal pump of twisted blades in different conditions. The results show that the relationship between the lift,shaft power,efficiency and flow, are compared with experimental ones, and it shows that the predicted performance coincides with the experimental one well, the simulation provides theoretical basis for the optimizing design.

scholarly journals Comparison of RANS and scale-resolving approaches when modelling the turbulent flow behind a bluff body

2019 ◽  
Vol 196 ◽  
pp. 00036
Author(s):  
Svetlana V. Pogudalina ◽  
Natalya N. Fedorova ◽  
Svetlana A. Valger
Keyword(s):  
Experimental Data ◽  
Numerical Simulation ◽  
Numerical Calculation ◽  
Turbulent Flow ◽  
Bluff Body ◽  
Air Flow ◽  
Ansys Fluent ◽  
Fluent Software

In this paper, the results of a numerical simulation of the air flow in the vicinity of a parallelepiped fixed on a plate are presented. The 3D calculations were performed with the ANSYS Fluent software using scale-resolving DES approach. The obtained results are compared with the experimental data and with the results of the previous numerical calculation.

scholarly journals Direct Numerical Simulation of separated turbulent flow in axisymmetric diffuser

2021 ◽  
Vol 2103 (1) ◽  
pp. 012214
Author(s):  
A S Stabnikov ◽  
D K Kolmogorov ◽  
A V Garbaruk ◽  
F R Menter
Keyword(s):  
Experimental Data ◽  
Numerical Simulation ◽  
Direct Numerical Simulation ◽  
Turbulent Flow ◽  
Turbulence Model ◽  
Eddy Viscosity ◽  
Separated Flow ◽  
Model Improvement ◽  
Good Agreement

Abstract Direct numerical simulation (DNS) of the separated flow in axisymmetric CS0 diffuser is conducted. The obtained results are in a good agreement with experimental data of Driver and substantially supplement them. Along with other data, eddy viscosity extracted from performed DNS could be used for RANS turbulence model improvement.

The Experimental Study and Numerical Simulation of Turbulent Flow in Pumping Forebay

2009 ◽  
Author(s):  
Chao Liu ◽  
Jiren Zhou ◽  
Li Cheng
Keyword(s):  
Experimental Data ◽  
Numerical Simulation ◽  
Turbulent Flow ◽  
Three Dimensional ◽  
Computational Results ◽  
Experiment Study ◽  
Study Results ◽  
Measurement Results ◽  
Good Agreement ◽  
Made In

The experiment study was made to optimize the design of a pumping forebay. The Combined-sills were made in the forebay to eliminate the circulation and vortices of the diffusing flow successfully. The Numerical simulation of three-dimensional turbulent flow is applied on the complicate fore-and-aft flow of sills. The computational results are compared with the measurement results of physical model. The calculated results are in good agreement with the experimental data. The flow pattern is obviously improved. The study results have been applied in the project which gives a uniform approach flow to the pumping sump.

Lattice Boltzmann Simulation of Cavitating Flows

2013 ◽  
Vol 13 (3) ◽  
pp. 685-695 ◽  
Author(s):  
Giacomo Falcucci ◽  
Stefano Ubertini ◽  
Gino Bella ◽  
Sauro Succi
Keyword(s):  
Experimental Data ◽  
Numerical Simulation ◽  
Equation Of State ◽  
Lattice Boltzmann ◽  
Fluid Dynamic ◽  
Cavitating Flows ◽  
Lattice Boltzmann Simulation ◽  
Break Up ◽  
Multi Phase ◽  
Boltzmann Method

AbstractThe onset of cavitating conditions inside the nozzle of liquid injectors is known to play a major role on spray characteristics, especially on jet penetration and break-up. In this work, we present a Direct Numerical Simulation (DNS) based on the Lattice Boltzmann Method (LBM) to study the fluid dynamic field inside the nozzle of a cavitating injector. The formation of the cavitating region is determined via a multi-phase approach based on the Shan-Chen equation of state. The results obtained by the LBM simulation show satisfactory agreement with both numerical and experimental data. In addition, numerical evidence of bubble break-up, following upon flow-induced cavitation, is also reported.

An Experimental Study on the Effect of Oil Viscosity and Wear-Ring Clearance on the Performance of an Industrial Centrifugal Pump

2012 ◽  
Vol 134 (1) ◽  
Author(s):  
Wen-Guang Li
Keyword(s):  
Experimental Study ◽  
Centrifugal Pump ◽  
Hydraulic Parameters ◽  
Centrifugal Pumps ◽  
Oil Viscosity ◽  
Relative Variation ◽  
Performance Curves ◽  
Shaft Power ◽  
Low Specific Speed ◽  
Specific Speed

The clearance of wear-rings in the impeller of centrifugal pumps has an important influence on the pump’s performance. Unfortunately, this effect has not been quite well documented, especially for the centrifugal pumps handling viscous oils. An industrial centrifugal pump with low specific speed was employed as a model to investigate the effect of the clearance on the performance of the pump. In this experimental study, the clearances of the wear-rings on the impeller shroud and hub were enlarged; the performances of the pump were measured when it pumped water and the viscous oils. The performance curves, the hydraulic parameters, and their relative variation ratios at best efficiency points were examined carefully for different clearances at various viscosities. The results showed that the flow rate is varied relatively in a range of −6% − +5%, the head −10% − +6%, the shaft-power + 2% −+8% and the efficiency −19% − +2%, respectively, when the clearance was enlarged from 0.25 mm to 0.85 mm at best efficiency points. The clearance of wear-rings on shroud has a more significant influence on the performance than on the hub. However, such an effect is weakened with increasing viscosity.

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