Numerical Calculation on Cavitation Pressure Pulsation in Centrifugal Pump

Shi, Weidong; Wang, Chuan; Wang, Wei; Pei, Bing

doi:10.1155/2014/367631

Cited by 21 publications

(17 citation statements)

References 7 publications

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“…That is the case of Ji et al [11,12] who studied the horse-shoe cloud behavior over a twisted hydrofoil and predicted the performances of a marine propeller under cavitation condition with different skew angles. Shi et al [13] also showed the remarkable use of the Zwart-Gerber-Belamri model for the study of cavitation in a WP7 automobile centrifugal pump. Zhang et al [14] used this model to study the effects of density ratio on the maximum length of the attached sheet of vapor.…”

Section: Introductionmentioning

confidence: 99%

Implicit large eddy simulation of unsteady cloud cavitation around a plane-convex hydrofoil

et al. 2015

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The present research, focuses on the erosive cavitation behavior around a plane convex hydrofoil. For that, Tthe Zwart-Gerber-Belamri cavitation model has been implemented in library form to be used withto carry out in OpenFOAM. Implicit Large Eddy Simulation (ILES) has been applied to analyze the three dimensional unsteady cavitating flow around a plane convexthe hydrofoil. The numerical results corresponding to hydrodynamic conditions that have been experimentally tested at the high speed cavitation tunnel of the École Polytechnique Fédérale de Lausanne (EPFL) show the sheet cavitation development and the shedding and collapse of vapor clouds. It is noted that cavitation evolution including maximum vapor length, detachment and oscillation frequency are fairly well simulated. Furthermore, the pressure pulses due to the cavitation development as well as complex vortex structures are reasonably predicted. Consequently, these results confirm that the present numerical method can be used to investigate unsteady cavitation around hydrofoils with satisfactory accuracy.

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Section: Introductionmentioning

confidence: 99%

Implicit large eddy simulation of unsteady cloud cavitation around a plane-convex hydrofoil

et al. 2015

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“…The steady calculation results were used as an initial value for the unsteady calculation. A total of 30 time steps are usually set per impeller revolution in the unsteady calculation for a multivane pump (Shi, 2014). Considering the wider impeller flow channel of a double-vane pump, 60 time steps per impeller revolution were set in this study.…”

Section: Calculation Methods and Monitoring Pointsmentioning

confidence: 99%

“…Tan (2015) investigated unsteady flows in a centrifugal pump volute under non-cavitation and cavitation conditions using a computational fluid dynamics framework combining the re-normalization group kε turbulence model and the mass transport cavitation model. Shi (2014) simulated the unsteady flow for non-cavitation and cavitation inside different centrifugal pumps and analysed the flow characteristics for non-cavitation and cavitation.…”

Section: Introductionmentioning

confidence: 99%

Effect of Reflux Hole on the Transient Flow Characteristics of the Self-Priming Sewage Centrifugal Pump

Zhou

Mou

et al. 2019

JAFM

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The reflux hole has a large effect on the performance of self-priming centrifugal pumps. In order to study the effects of the reflux hole on the performance and transient flow characteristics of the self-priming centrifugal pump, four different areas of the reflux hole inside an external mixed self-priming pump were proposed. The 3D transient flow was numerically simulated under different operating conditions for the investigated pump. The differential pressure, reflux quantity and transient flow characteristics near the reflux hole were analysed, and then the effects of the reflux hole area on the pressure fluctuation characteristics and performance of the pump were further researched. The results show that the differential pressure and reflux quantity is zero around the best-efficiency point. The vorticity magnitude near the exit of the reflux hole is significant, and the unsymmetrical flow structures represent periodic motion over time in the cross-section. The pressure fluctuation intensities of monitoring points P2-P5 upstream of the reflux hole were generally larger than others and decreased with a decrease in reflux hole area. With a decrease of the reflux hole area, the performance of the pump improved to some extent.

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“…The F cond value is smaller than F vap value, due to the fact that condensation is usually much slower than vaporization. 25 …”

Section: Governing Equationsmentioning

confidence: 99%

Simulation of cavitation performance of an axial flow pump with inlet guide vanes

Feng

Cheng

Guo

2016

Advances in Mechanical Engineering

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The cavitation performance of an axial flow pump with inlet guide vanes for different flow rates is studied in this article. The effects of inlet guide vanes on pump hydraulic performance and cavitation are investigated, where the total vapor fraction of impeller zone (F tv ) is calculated to predict the critical net positive suction head, which is compared with that predicted by efficiency criterion for different flow rates. The influences of the development of cavitation on internal flow in impeller zone are also investigated. The results obtained show that the cavitation performance of axial flow pump can be improved at off-design flow conditions by adjusting angles of inlet guide vanes to positive values at low flow rates and by regulating angles of inlet guide vanes to negative values at high flow rates. As the net positive suction head decreases, the vapor fraction first increases slowly and then increases greatly, clearly presenting cavitation process from inception to full development, which can be used to predict the required net positive suction head. When net positive suction head decreases to the value around required net positive suction head, the cavitation zone from tip of blade suction side close to leading edge and the cavitation zone from hub part of the blade suction side connect together. After the connection, the cavitation zones have great influence on the velocity flow, leading to the decrease in pump performance.

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Numerical Calculation on Cavitation Pressure Pulsation in Centrifugal Pump

Cited by 21 publications

References 7 publications

Implicit large eddy simulation of unsteady cloud cavitation around a plane-convex hydrofoil

Implicit large eddy simulation of unsteady cloud cavitation around a plane-convex hydrofoil

Effect of Reflux Hole on the Transient Flow Characteristics of the Self-Priming Sewage Centrifugal Pump

Simulation of cavitation performance of an axial flow pump with inlet guide vanes

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