Rotating Corrected-Based Cavitation Model for a Centrifugal Pump

Wang, J.; Wang, Yong; Liu, Houlin; Si, Qiaorui; Dular, Matevž

doi:10.1115/1.4040068

Cited by 23 publications

(3 citation statements)

References 41 publications

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“…However, LES is always limited by computing resource due to the large curvature of the centrifugal pump blade and its rotating characteristic. Wang et al [9] proposed a cavitation model considering rotation correction, and the unsteady cavitation characteristics of a centrifugal pump are studied with the Unsteady Reynolds-Averaged Navier-Stokes (URANS) method. Accurate prediction of the cavitation vortex field is still a difficult problem at present.…”

Section: Introductionmentioning

confidence: 99%

Unsteady Cavitation Analysis of the Centrifugal Pump Based on Entropy Production and Pressure Fluctuation

Si,

Deng,

et al. 2023

IJTPP

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A numerical method using combined detached-eddy simulation (DES) and a cavitation model considering the rotation effect is used for unsteady cavitation flow field of the centrifugal pump. A closed-type pump test system was established to obtain the pump performance and pressure pulsation characteristics under different flow rates and cavitation condition, which provide boundary conditions and verification of calculations. Based on the calculation results of the unsteady flow field of the centrifugal pump cavitation, the entropy generation analysis of the flow field and an analysis of the pressure fluctuation characteristics were carried out. Then, we tried to reveal the relationship between cavitation and the deterioration of the centrifugal pump performance and the generation of the unstable operation excitation force. The internal energy loss is mainly concentrated in the impeller, volute, and pump cavity area, which accounts for more than 85% of the total entropy generation. The characteristic frequency of a Strouhal number of about 0.333 appears at the volute tongue due to the cavitation flow spread downstream.

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Section: Introductionmentioning

confidence: 99%

Unsteady Cavitation Analysis of the Centrifugal Pump Based on Entropy Production and Pressure Fluctuation

Si,

Deng,

et al. 2023

IJTPP

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show abstract

“…Up to now, nearly one hundred cavitation models have been developed, and great progress has been made in capturing cavitation flow in simple structures in combination with LES, detached-eddy simulation et al However, LES is always limited by computing resource due to the large curvature of the centrifugal pump blade and its rotating characteristic. Wang et al [9] proposed a cavitation model considering rotation correction, and the unsteady cavitation characteristics of a centrifugal pump are studied with URANS. The accurate prediction of the cavitation vortex field is still a difficult problem at present.…”

Section: Introductionmentioning

confidence: 99%

Unsteady Cavitation Analysis of the Centrifugal Pump Based on Entropy Production and0 Pressure Fluctuation

Si¹,

Deng²,

Yu³

et al. 2023

Preprint

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A numerical method using combined detached-eddy simulation (DES) and cavitation model considering the rotation effect is used for unsteady cavitation flow field of the centrifugal pump. Closed type pump test system was established to obtain the pump performance and pressure pulsation characteristics under different flow rates and cavitation condition, which provide boundary conditions and verification of calculations. Based on the calculation results of the unsteady flow field of the centrifugal pump cavitation, the entropy generation analysis of the flow field and the pressure fluctuation characteristics were carried out. Then the relationship between cavitation and the deterioration of the centrifugal pump performance and the generation of the unstable operation excitation force was tried to reveal. The internal energy loss is mainly concentrated in the impeller, volute, and pump cavity area, which accounts for more than 85% of the total entropy generation. The characteristic frequency of about 0.333 Strouhal Number appears at the volute tongue due to the cavitation flow spread downstream.

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“…These trends require higher flow velocity in the torque converter, which leads to lower local pressures and thus greater cavitation risk. Cavitation has plagued fluid machinery for centuries [2] [3], degrading performance and introducing noise, vibration, and even failure depending on the cavitation degree [4]. Considerable research effort has been devoted to understanding the cavitation mechanism to enable suppression of its effectys [5][6] [7].…”

Section: Introductionmentioning

confidence: 99%

Influence of Charging Oil Condition on Torque Converter Cavitation Characteristics

Liu¹,

Meng²,

Yan³

et al. 2020

Preprint

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Cavitation inside a torque converter induces noise, vibration and even failure, and these effects have been disregarded in previous torque converter design processes. However, modern high-capacity torque converter applications require attention to this issue. Therefore, this study investigated the cavitation effect on a torque converter using both numerical and experimental methods with an emphasis on the influence of the charging oil feed location and charge pressure. Computational fluid dynamics (CFD) models were established to simulate the transient cavitation behaviour in the torque converter using different charging oil pressures and inlet arrangements and testing against a base case to validate the results. The CFD results suggested that cavitating bubbles mainly takes place in the stator of the torque converter. The transient cavitation CFD model yielded good aggrement with the experimental data, with an error of 7.6% in the capacity constant and 7.4% in the torque ratio. Both the experimental and numerical studies showed that cavitation induced severe capacity degradation, and that the charge pressure and charging oil configuration significantly affects both the overall hydrodynamic performance and the fluid behaviour inside the torque converter because of cavitation. Increasing the charge pressure and charging the oil from the turbine-stator clearance were found to suppress cavitation development and reduce performance degradation, especially in terms of the capacity constant. This study revealed the fluid field mechanism behind the influence of charging oil conditions on torque converter cavitation behaviour, providing practical guidelines for suppressing cavitation in torque converter.

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Rotating Corrected-Based Cavitation Model for a Centrifugal Pump

Cited by 23 publications

References 41 publications

Unsteady Cavitation Analysis of the Centrifugal Pump Based on Entropy Production and Pressure Fluctuation

Unsteady Cavitation Analysis of the Centrifugal Pump Based on Entropy Production and Pressure Fluctuation

Unsteady Cavitation Analysis of the Centrifugal Pump Based on Entropy Production and0 Pressure Fluctuation

Influence of Charging Oil Condition on Torque Converter Cavitation Characteristics

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