A Study in the Use of CFD in the Design of Centrifugal Pumps (original) (raw)
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The Use of CFD for Flow Analysis and Performance Prediction of Centrifugal Pumps
This paper presents some user experience in using the commercial CFD code Fluent for pump flow field calculations. It demonstrates the use of the code with respect to simulating the flow within an industrial centrifugal pump and predicting the corresponding head-capacity curve. Throughout the paper, the CFD model of the selected pump is discussed. The pump with backward curved blades is modeled and meshed with unstructured grid. Quasi-steady calculations utilizing the k-ε turbulence model and the multi reference frame technique are performed for the design point as well as for a range of volume rates with a deviation of 50% from the design value but with similar flow patterns. The data obtained allow the analysis of the main phenomena existent in the pump, such as: pressure changes in the volute for different flow rates; and the incidence at the leading edge of the blade with different flow conditions.
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.
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
The design of centrifugal pumps needs a detailed understanding of the internal flow. The prediction of the flow inside the pump is comple due, mainly, to the rotation and the curved three-dimensional shape of the impellers, and its intrinsic unsteady behavior. Using computational fluid dynamics CFD codes, the flow behavior predictions are quite good in some cases, but the complex internal flows are not fully understood yet especially at off-design conditions or when internals, like diffuser, are presents. Nowadays it is very common to use CFD codes in order to investigate the behavior of that kind of flow, and the (CFD) analysis is being increasingly applied in the design of centrifugal pumps. Nevertheless, fundamental questions like the most appropriate method for modeling the rotation of the impeller and its interaction with the static diffuser remains open.
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.
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.
Contemporary Engineering Sciences, 2018
In this work, the hydraulic and energetic performance of a centrifugal pump is studied in CFD (Computational Fluid Dynamics), to achieve optimization in its performance through a parametric analysis. Variations were made in pump parameters such as diameter, number of blades and speed of rotation, to study their influence over the general performance of the pump, by using a CFD package; the results obtained were validated in a test bench, to guarantee the prediction capacity of the simulations. In the same way, a theoretical analysis was carried out, comparing the results with the Euler equation and corrections with Stodola equation. An analysis of mesh independence was carried out, to optimize the simulation process and computational resources. The results allowed to conclude that the reduction in the thickness of the pump casing, which has the effect of a larger diameter of the impeller, leads to an increase in the effective head of the pump; similar results are obtained with the increase in the number of blades and the 1350 Jorge Duarte et al. increase in the speed of rotation, although in the latter case, it is less accentuated due to the reduction in volumetric efficiency.
CFD Analysis of centrifugal pump impeller for performance enhancement
Centrifugal pumps are used extensively for pumping water over short to medium distance through pipeline where the requirements of head and discharge are moderate. This project is devoted to enhance the performance of the centrifugal pump through design modification of impeller. Theories on pump characteristics are studied in detail. Vane profile of the impeller is generated using point by point method. The impeller is modelled in Solidworks 2012 software and CFD analysis is done using fluid flow simulation package. CFD analysis enables to predict the performance of the pump and a comparative analysis is made for the entire control volume by varying meshing Pump impeller models have been developed for critical design parameters of the pump. CFD analysis is done in the models to predict the pump performance virtually. Experimental analysis is to be carried out during the second phase of the project work.
Computational Approaches in Industrial Centrifugal Pumps
IntechOpen eBooks, 2022
The growing energy demand is expected to be met with increased oil and gas production. Hence, there is a need to design high-performance industrial centrifugal pumps. Recent improvements in CFD are considered as a valuable research tool to investigate the flow inside the pump and its influence on the performance of the centrifugal pump. The scope of the chapter is to emphasize the use of CFD and theoretical analysis for design and to show the prospect of improving the efficiency of a centrifugal pump. The chapter discusses the computational approaches to the CAD modeling and CFD simulation of the industrial centrifugal pumps, and the strategies and methodologies adopted. The chapter would be relevant and useful to both the pump designers, manufacturers, and industrial users.