CFD for Centrifugal Pumps: A Review of the State-of-the-Art (original) (raw)

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.

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

Chemical, Civil and Mechanical Engin CFD for centrifugal p

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 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.

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.

IJERT-Design and CFD Analysis of Centrifugal Pump

International Journal of Engineering Research and Technology (IJERT), 2021

https://www.ijert.org/design-and-cfd-analysis-of-centrifugal-pump https://www.ijert.org/research/design-and-cfd-analysis-of-centrifugal-pump-IJERTCONV9IS10007.pdf Centrifugal pumps are a most commonly used in different fields like industries, agriculture and domestic applications. Computational Fluid Dynamics is most commonly used tool for simulation and analysis. 3-D numerical CFD tool is used for simulation of the flow field characteristics inside the turbo machinery. CFD simulation makes it possible to visualize the flow condition inside centrifugal pump. The present paper describes the head, power, efficiency and to evaluate the pump performance using the ANSYS FLUENT, a computational fluid dynamics simulation tool. These simulations of centrifugal pumps are strongly related to flow rate and pressure drop, which may occur in either the rotating runnerimpeller or the stationary parts of the centrifugal pumps. The numerical simulation can be used to detect the performance of centrifugal pump and to get safe range of operating at different flow rate and rotating speeds. Top view and front view of centrifugal pump

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.

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 Investigation on Three Turbulence Models for Centrifugal Pump Application

The Eurasia Proceedings of Science Technology Engineering and Mathematics

This paper highlight the influence of three numerical turbulence models on the convergence and the performance of flow simulation. The computational comparative study was realized using the COMSOL Multiphysics 5.5 code. Turbulence was generated numerically in a centrifugal water pump using the k−ϵ, k−ω and k−ω SST models. However, the geometry was performed on SolidWorks due to its complexity. The flow modelling was mainly based on the resolution of the stationary Navier-Stokes equations. The effects of the tested models on CFD numerical simulation were examined. It was found that the best calculation precision was obtained using the K−ω model, while the lowest was provided by the K−ω SST model. However, a very low calculation cost was obtained by the latter. As well as better pumping performance were recorded.

Validation in the improved performance of Centrifugal pump using CFD

It is the time when manufacturing the parts of the machine and testing it is difficult. The system is upgraded and now software such as Ansys can be used to test the machine performance. The improvement in the centrifugal pumps can be made using computational fluid dynamics. The changes and modifications in the geometry of impeller finest geometry are experimentally improved and testified.