Numerical investigation of clocking effect on a centrifugal pump with inlet guide vanes

Qu, Wanshi; Tan, Lei; Cao, Shuai; Wang, Yuchuan; Xu, Ye

doi:10.1108/ec-12-2014-0259

Cited by 32 publications

(31 citation statements)

References 25 publications

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“…The boundary conditions are set as the total pressure at pump inlet, the mass flow rate at pump outlet and no slip wall at walls. The methods of frozen rotor and transient rotor stator are applied to coupling the rotational and stationary domains for steady and unsteady calculations, respectively [21][22][23][24].…”

Section: Methodsmentioning

confidence: 99%

Energy Performance and Flow Patterns of a Mixed-Flow Pump with Different Tip Clearance Sizes

et al. 2017

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Tip clearance between blade end and shroud is inevitable in pump operation and of great importance on pump energy performance and pressure fluctuation. As the tip clearance size increases, the head and efficiency of the mixed flow pump drop accordingly. The simulation results show that the development of a leakage vortex is observed as the tip clearance increases, and the trajectory of this leakage vortex remains in the same direction along the blade suction side for different tip clearances. With the increase in tip clearance size, the intensity of the leakage vortex is enhanced, and the separation between the main leakage vortex and the secondary leakage vortex is also strengthened. The leakage separation angle near the blade tip remains at the same value of 10° for different tip clearance sizes. As for the spectrum analysis, the maximum amplitudes of pressure fluctuations dramatically increase in the impeller when the tip clearance increases from 0.0 mm to 1.0 mm, and the dominant frequencies go from 145 Hz to 184 Hz due to the considerable leakage flow.

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Section: Methodsmentioning

confidence: 99%

Energy Performance and Flow Patterns of a Mixed-Flow Pump with Different Tip Clearance Sizes

et al. 2017

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“…The boundary conditions are set as: the total pressure at pump inlet, the mass flow rate at the pump outlet, and no slip wall at the walls. The methods of frozen-rotor and transient-rotor-stator are applied to couple the rotational and stationary domains for steady and unsteady calculations, respectively [22][23][24]. The relative position between the stable suction pipe and the volute and the rotational impeller remains unchanged in the frozen-rotor method, while it varies according to the angular velocity of the impeller in the transient-rotor-stator method.…”

Section: Methodsmentioning

confidence: 99%

Influence of Prewhirl Angle and Axial Distance on Energy Performance and Pressure Fluctuation for a Centrifugal Pump with Inlet Guide Vanes

et al. 2017

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Abstract:The energy performance and pressure fluctuations in a centrifugal pump with inlet guide vanes (IGVs) are investigated experimentally and numerically in a prewhirl angle range of −24 • to 24 • and in an axial distance range of 280 mm, 380 mm, and 460 mm. The reliability and accuracy of the numerical method are validated by the satisfactory agreement between the experimental data and numerical results. Prewhirl regulation with IGVs can significantly increase the energy performance and broaden the efficient operation range for the centrifugal pump due to the improvement of flow pattern at the impeller inlet. The prewhirl angle has an obvious impact on pump energy performance, and the maximum amplitudes of pressure fluctuations on the blade leading edge of the pressure and suction sides decrease by 69% and 89%, respectively. The axial distance has a slight impact on pump energy performance, but the maximum amplitudes of pressure fluctuations drop by 35.4% on the blade leading edge of pressure side when the axial distance extends from 280 mm to 460 mm.

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“…Both experimental and numerical approaches have been used to study compressor flow, with and without IGVs. Both can give valuable insight; however, both have their limitations.…”

Section: Introductionmentioning

confidence: 99%

A 1D mean line model for centrifugal compressors with variable inlet guide vanes

Dewar

Creamer²,

Dotcheva

et al. 2019

Engineering Reports

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This paper considers a 1D in‐line analytical model for centrifugal compressors with variable inlet guide vanes. A theoretical 1D model is developed to predict the effect of varying the inlet guide vane angle at different rotational speeds. An iterative algorithm is presented, which provides a fast and efficient method for evaluating the performance of the compressor under different operating conditions. The results from the analytical 1D model are presented and compared to full 3D CFD (computational fluid dynamics) simulations. The simulations validate the assumptions used in the 1D model and show good agreement between the two approaches over a range of vane angles. Qualitatively, both demonstrate the same trends as the vane angle and rotational velocities are varied. Quantitatively, the pressure ratio was found to agree within 8% and the temperature gain to within 15%. The 1D model was then modified to introduce a 5% loss in the diffuser and this was found to improve the 1D model predictions, with the pressure within 2% of the CFD value.

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Numerical investigation of clocking effect on a centrifugal pump with inlet guide vanes

Cited by 32 publications

References 25 publications

Energy Performance and Flow Patterns of a Mixed-Flow Pump with Different Tip Clearance Sizes

Energy Performance and Flow Patterns of a Mixed-Flow Pump with Different Tip Clearance Sizes

Influence of Prewhirl Angle and Axial Distance on Energy Performance and Pressure Fluctuation for a Centrifugal Pump with Inlet Guide Vanes

A 1D mean line model for centrifugal compressors with variable inlet guide vanes

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