CFD Simulation to Enhance the Efficiency of Centrifugal Pump by Application of Inner Guide Vanes

Junaidi, Md. Abdul Raheem; Kumari, Nutan; Samad, Mohd. Abdul; Ahmed, Gulam Mohammed Sayeed

doi:10.1016/j.matpr.2015.07.200

Cited by 11 publications

(4 citation statements)

References 8 publications

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“…But in the low flow condition, the presence of the guide vanes had an inhibiting effect on the circulating flow in the rotor inlet. To address the flow inhomogeneities in centrifugal turbines, Junaidi et al (2015) installed guide vanes at the impeller inlet of the turbine to eliminate the vortex flow due to internal deformation. Comparing the internal static pressure and axial power of centrifugal fans with and without IGVs, they noticed that the stable operating range of centrifugal fans was extended and the power consumption was reduced under off-design conditions.…”

Section: Introductionmentioning

confidence: 99%

Influence of Different Offset Angles of Inlet Guide Vanes on Flow Characteristics of Centrifugal Pump

Lin

Yang

et al. 2022

Front. Energy Res.

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The efficiency of the impeller machinery can be improved by the inlet guide vanes, but the relationship between the external characteristics of the centrifugal pump and the internal flow state needs further study. In this paper, the flow characteristics of the centrifugal pump with different offset angles of inlet guide vanes (IGVs) are simulated based on the SST k-ω turbulence model. The influence of the offset angle of the IGV on the internal flow and energy dissipation of the centrifugal pump is analyzed by using the entropy generation theory and Q-criterion. The research results show that the increase of the offset angle is beneficial to reducing the intensity of vortex in the volute and impeller, while the energy loss is reduced by 21.12 and 17.82% at 0.6Qd and 0.8Qd, respectively. However, the excessive offset angle of the IGV tends to cause greater energy loss in the inlet pipe, thus reducing the head and efficiency of the centrifugal pump. In terms of external characteristics, the pump with 25° IGVs has the best head and efficiency improvement. Under three small operating points, the pump with 25° IGVs increased the head by 2.11, 0.95, and 0.73% and the efficiency by 2.51, 1.67, and 1.25%, respectively, compared with the pump with 0° IGVs. The research in this paper contributes to the performance improvement of centrifugal pumps operating at low flow conditions.

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Section: Introductionmentioning

confidence: 99%

Influence of Different Offset Angles of Inlet Guide Vanes on Flow Characteristics of Centrifugal Pump

Lin

Yang

et al. 2022

Front. Energy Res.

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“…The CFD techniques for turbomachinery modeling are the best tool for understanding certain complex aerodynamic phenomena characteristic of this type of flow. Studies developed by Junaidi et al (2015), Lam & Peng (2016), and Zhang & Baar (2018) showed that this technique is widely applied to various types of turbomachinery.…”

Section: Introductionmentioning

confidence: 99%

Numerical-experimental comparison of radial fans applied in pneumatic transport of agricultural fertilizer spreaders

Fogal

Micheli

Scalon

et al. 2021

Rev. bras. eng. agríc. ambient.

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This study presents a numerical and experimental comparison of two different types of radial fans used in an agricultural fertilizer spreader at a rotation of 4000 rpm. The numerical analysis was validated through experiments conducted on a test bench using a hot-wire anemometer for velocity measurements and a Pitot tube for pressure readings. A simulation of the agricultural fertilizer spreader was carried out after the experimental validation of the mathematical models of the radial fans on the test bench to evaluate the air distribution behavior along the application nozzles, which was compared to the experimental results. A turbulent mean-field was obtained using the Reynolds Averaged Navier Stokes (RANS) and the k-Epsilon turbulence model was used for two equations. The computational fluid dynamics software CFX 18.1 was used to solve the transport equations. Unstructured tetrahedral meshes generated by the ICEM CFD 18.1 software were used in all models. The applied method is adequate and able to reproduce the fluid-dynamic behavior of airflow in pneumatic systems of agricultural fertilizer spreaders, avoiding the need for prototypes.

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“…In recent years, some scholars have performed a lot of research on the vaned diffuser of the centrifugal pump by experiment and numerical simulation. [14][15][16][17][18] Sun et al 19 analyzed the pressure fluctuations in a pump turbine with different guide vane's opening angle and found that pressure fluctuation under design-opening angle were much lower than those under off-designopening angle. The main source of pressure fluctuation between runner and guide vanes is rotor/stator interaction.…”

Section: Introductionmentioning

confidence: 99%

Efficiency improvement and evaluation of a centrifugal pump with vaned diffuser

Wang

Jing

et al. 2019

Advances in Mechanical Engineering

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In order to enhance the efficiency of centrifugal pump, the structure of a centrifugal pump with vaned diffuser, whose specific speed is 190, was numerically improved by trimming back-blades of impeller and smoothing sharp corner in annular chamber. The energy performance, the internal flow field, the axial force, the radial force, and the pressure pulsation of the pump were analyzed. Results show that efficiency of the improving scheme 1 under the design flow rate is 77.47%, which can balance 69.82% of the axial force, while efficiency of the improving scheme 2 under the design flow rate is the maximum, which could still balance 62.74% of the axial force. The pressure pulsations of the improving scheme 2 at the typical monitoring points are less than that of the improving scheme 1 and the original scheme. The difference of the radial force peak between the improving scheme 1 and the improving scheme 2 is very small. The vector distributions of the radial force of the improving scheme 1 and the improving scheme 2 are more uniform than that of the original scheme. Considering the efficiency, pressure pulsation, and axial force, experiment measurements on the improving scheme 2 were carried out to verify the effectiveness of the improvement result. Results of energy performance experiment show that efficiency of the improving scheme 2 under the design flow rate is 76.48%, which is 5.26 percentage points higher than that of the original scheme.

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CFD Simulation to Enhance the Efficiency of Centrifugal Pump by Application of Inner Guide Vanes

Cited by 11 publications

References 8 publications

Influence of Different Offset Angles of Inlet Guide Vanes on Flow Characteristics of Centrifugal Pump

Influence of Different Offset Angles of Inlet Guide Vanes on Flow Characteristics of Centrifugal Pump

Numerical-experimental comparison of radial fans applied in pneumatic transport of agricultural fertilizer spreaders

Efficiency improvement and evaluation of a centrifugal pump with vaned diffuser

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