Computational Approaches in Industrial Centrifugal Pumps (original) (raw)
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The Use of CFD for Flow Analysis and Performance Prediction of Centrifugal Pumps
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FLOW SIMULATION AND PERFORMANCE PREDICTION OF CENTRIFUGAL PUMPS USING CFD-TOOL
With the aid of computational fluid dynamics, the complex internal flows in water pump impellers can be well predicted, thus facilitating the product development process of pumps. In this paper a commercial CFD code was used to solve the governing equations of the flow field. A 2-D simulation of turbulent fluid flow is presented to visualize the flow in a centrifugal pump, including the pressure and velocity distributions. The standard k- turbulence model and SIMPLEC algorithm were chosen for turbulence model and pressure-velocity coupling respectively. The simulation was steady and moving reference frame was used to consider the impeller-volute interaction. The head and efficiency at different flow rates are predicted and they agree well with those available in literature for similar pump. From the simulation results it was observed that the flow change has an important effect on the location and area of low pressure region behind the blade inlet and the direction of velocity at impeller inlet. From the study it was observed that FLUENT simulation results give good prediction of performance of centrifugal pump and may help to reduce the required experimental work for the study of centrifugal pump performance.
CFD for Centrifugal Pumps: A Review of the State-of-the-Art
Procedia Engineering, 2013
The flow analysis inside the centrifugal pump is high cavitation and unsteadiness. In recent years, a growin methods brought turbo machinery Computational Flu markets. The critical review of CFD analysis of cent this paper. CFD technique has been applied by the re prediction at design and off-design conditions, par running in turbine mode etc. Unsteady Reynolds-av were found to be appropriate for CFD analysis of c interesting research fields for the further improvemen the analysis of two phase flow, pump handling non-N
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CFD has the potential of assisting an engineer in arriving at improved designs. However, to be effective, this requires a much closer cooperation and mutual understanding between the pump specialist and the expert in CFD, than it is presently in existence. This conclusion is based on actual case histories from past experience, as well as considerations of the physical meaning of certain mathematical expressions. The presented discussion relates, primarily, to the design of centrifugal pumps. However, there are strong indications that analogical situations exist also in other fields of fluids engineering. Keywords: centrifugal pumps; CFD; flow pattern; impeller; volute; noise; pump design
CFD Analysis of Centrifugal Pump: A Review
The main objective of this work is to understand role of the computational fluid dynamics (CFD) technique in analyzing and predicting the performance of centrifugal pump. Computational Fluid Dynamics (CFD) is the present day state-of-art technique for fluid flow analysis. The critical review of CFD analysis of CFD analysis of centrifugal pump along with future scope for further improvement is presented in this paper. Different solver like ANSYS-CFX, FLUENT etc can be used for simulations. Shear stress transport model has been found appropriate as turbulence model. Study of pressure contours, velocity contours, flow streamlines etc can be studied by CFD techniques. Unsteady Reynolds Averaged Navier Stokes (URANS) equations are solved by solver to get flow simulation results inside centrifugal pump. CFD results has to be validated with testing results or with performance characteristics curves. Performance prediction at design and off-design conditions, parametric study, cavitation analysis, diffuser pump analysis, performance of pump running in turbine mode etc. are possible with CFD simulation techniques.
IJERT-Design and CFD Analysis of Centrifugal Pump
International Journal of Engineering Research and Technology (IJERT), 2021
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Design and CFD Analysis of Centrifugal Pump
International Journal for Research in Applied Science & Engineering Technology (IJRASET), 2022
The purpose of this report is to identify /observe and determine the pattern of velocity profile and pressure distribution by using CFD simulation program after the 3D design and modeling of the pump is made using Vista CPD. We have also created a Solid model using Fusion 360 to get a clear idea of Centrifugal pump design. Basically, this report revolves around the idea of investigating the effect and distribution of velocity profile and pressure within a pump having the following specification, Head = 20 m, Flow rate = 100 m 3 /hr, and RPM = 2000. 3D Navier-Stokes equations were solved using ANSYS CFX. The standard k −εturbulence model was chosen for the turbulence model. From the design point of view, we have studied the effects of different parameters like rotational speed, volume flow rate etc on the impeller and volute. From the simulation results it was observed that the pressure increases gradually from impeller inlet to outlet. The static pressure on the pressure side is evidently larger than that on the suction side at the same impeller radius. In addition to this, it was observed that the velocity increases from the impeller inlet until it enters the volute casing. It then drops to a minimum value at the outlet region.
Performance prediction of centrifugal pumps with CFD-tools
2001
The CFD-code FLUENT, version 5.4, has been used for the flow analysis of two test pumps of end-suction volute type: one of low specific speed and one of medium specific speed. For both, head as function of flow rate for constant rotational speed is known from experiments. FLUENT provides three calculation methods for analysis of turbomachinery flows: the Multiple Reference Frame method (MRF), the Mixing Plane method (MP) and the Sliding Mesh method (SM). In all three methods, the flow in the rotor is calculated in a rotating reference frame, while the flow in the stator is calculated in an absolute reference frame. In the MRF and MP methods steady flow equations are solved, while in the SM method, unsteady flow equations are solved. The SM method does not introduce physical approximations. The steady methods approximate the unsteady interaction between rotor and stator. The cost of the unsteady method is, however, typically 30 to 50 times higher than the cost of the steady methods. It is found that the MRF and MP methods lead to completely erroneous flow field predictions for flows far away from the best efficiency point. This makes the steady methods useless for general performance prediction.
Advanced Computational Fluid Dynamics for Emerging Engineering Processes - Eulerian vs. Lagrangian [Working Title], 2018
The chapter presents simulation models for the analysis of centrifugal pumps, fans and positive displacement pumps. In centrifugal pumps based on the "sliding mesh" method, a CFD model was created to calculate the flow characteristics, and the pump operating parameters were determined at which an unfavourable phenomenon of cavitation occurs. In the case of a radial fan, the CFD model was used to determine the influence of inlet channel geometry on the efficiency of an industrial installation. The main purpose of the CFD simulation was to obtain the pressure distributions and determine the areas in which cavitation may occur. To investigate the flow phenomena that occur in external gear pumps and double-acting vane pumps, the "immersed solid" method was used. The results of 2D and 3D simulation studies for various operating parameters of pumps have been presented.
Performance And Prediction Of Centrifugal Pumps With Steady And Unsteady CFD-methods
WIT transactions on engineering sciences, 2002
steady methods useless for general performance prediction. predictions for flows far away from the best efficiency point. This makes the found that the M W and MP methods lead to completely erroneous flow field however typically 30 to 50 times higher than the cost of the steady methods. It is unsteady interaction between rotor and stator. The cost of the unsteady method is introduce physical approximations. The steady methods approximate the the SM method, unsteady flow equations are solved. The SM method does not frame. In the MRF and MP methods steady flow equations are solved, while in reference frame, while the flow in the stator is calculated in an absolute reference (SM). In all three methods, the flow in the rotor is calculated in a rotating method (MW), the Mixing Plane method (MP) and the Sliding Mesh method methods for analysis of turbomachinery flows: the Multiple Reference Frame test pump of end-suction volute type. FLUENT provides three calculation The CFD-code FLUENT, version 5.4, has been used for the flow analysis of a