Effects of viscosity on turbine mode performance and flow of a low specific speed centrifugal pump

Li, Wenguang

doi:10.1016/j.apm.2015.06.015

Cited by 43 publications

(18 citation statements)

References 28 publications

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“…Only a few of them apply a combination impeller on a centrifugal pump. (3) The combination impeller has not been specifically used for an aero-fuel centrifugal pump, and it has not considered the viscosity of aero-fuel [26], the operation conditions under high-pressure, or the large flow rate [27].…”

Section: Introductionmentioning

confidence: 99%

Effects of a Combination Impeller on the Flow Field and External Performance of an Aero-Fuel Centrifugal Pump

Wang

Wang³

et al. 2020

Energies

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Aero-fuel centrifugal pumps are important power plants in aero-engines. Unlike most of the existing centrifugal pumps, a combination impeller is integrated with the pump to improve performance. First, the critical geometrical parameters of the combination impeller and volute are given. Then, the effects of the combination impeller on the flow characteristics of the impeller and volute are clarified by comparing simulation results with that of the conventional impeller, where the effectiveness of the selected numerical method is validated by an acceptable agreement between simulation and experiment. Finally, the experiment is set to test the external performance of the studied pump. A significant feature of this study is that the flow characteristics are significantly ameliorated by reducing the flow losses that emerged in the impeller inlet, impeller outlet, and volute tongue. Correspondingly, the head and efficiency of a combination impeller are higher with comparison to a conventional impeller. Consequently, it is a promising approach in ameliorating the flow field and improving external performance by applying a combination impeller to an aero-fuel centrifugal pump.

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Section: Introductionmentioning

confidence: 99%

Effects of a Combination Impeller on the Flow Field and External Performance of an Aero-Fuel Centrifugal Pump

Wang

Wang³

et al. 2020

Energies

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“…3) The combination impeller has not been specifically used for an aero-fuel centrifugal pump, and it has not considered the viscosity of aero-fuel [26], the operation conditions under high-pressure and large flow rate [27].…”

Section: Introductionmentioning

confidence: 99%

Effects of Combination Impeller on the Flow Field and External Performance of an Aero-fuel Centrifugal Pump

Li¹,

Wang²,

Wang³

et al. 2020

Preprint

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Aero-fuel centrifugal pumps are important power plants in aero-engines. Unlike most of the existing centrifugal pumps, a combination impeller is integrated with the pump to improve its performance. First, the critical geometrical parameters of combination impeller and volute are given. Then, the effects of combination impeller on flow characteristics inside the impeller and volute are clarified by comparing simulation results with that of the conventional impeller, where the effectiveness of selected numerical method is validated by an acceptable agreement between simulation and experiment. Finally, the experiment is performed to test the external performance of studied pump. A significant feature of this study is that the flow characteristics are significantly ameliorated by reducing the flow losses emerged in impeller inlet, impeller outlet and volute tongue. Correspondingly, the head and efficiency of combination impeller are higher with comparison to conventional impeller. Consequently, it is a promising approach in ameliorating flow field and improving external performance by applying a combination impeller to an aero-fuel centrifugal pump.

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“…Low-specific-speed centrifugal pumps are widely used in petrochemical, aerospace, nuclear, hydropower, and many other sectors, 1,2 especially applications of transporting the single-phase fluids with relatively low flow rates but high boosting pressure. Previous researches have revealed that significant deterioration of the pump performance can be resulted in by the presence of gas inside the rotating pump impeller.…”

Section: Introductionmentioning

confidence: 99%

Effect of cavitation and free-gas entrainment on the hydraulic performance of a centrifugal pump

Wang

Zhang

Zhu

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part A:

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An experimental study on gas–liquid two-phase flow characteristics in a low-specific-speed centrifugal pump is presented via employing multiple investigation techniques, such as visualization observation, measurements of acoustic emission and vibration, etc. Specially, three different flow conditions were inspected, namely gas locking initiation, critical cavitation with/without free-gas presence, etc. For gas locking, the drastic deterioration of the pump performance and the disrupted balance of shaft were observed. Especially, at low rotational speeds, the gas locking accompanied with intermittent or churn flow can be triggered by even lower inlet gas volumetric fractions. When it came to the cavitation flow, a small amount of gas entrainment could induce the rapid deterioration of cavitation and stimulate much higher amplitude in low-frequency band of shaft rotation. The relationship between the gas bubble trajectory and the vibration level under the backflow is discussed. The results reveal that the combined effect of the free-gas entrainment and cavitation on the pump instability is much stronger than that under natural cavitation or free-gas entrainment flow, whose fault diagnosis can be determined by the data manifested in different spectral segments.

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Effects of viscosity on turbine mode performance and flow of a low specific speed centrifugal pump

Cited by 43 publications

References 28 publications

Effects of a Combination Impeller on the Flow Field and External Performance of an Aero-Fuel Centrifugal Pump

Effects of a Combination Impeller on the Flow Field and External Performance of an Aero-Fuel Centrifugal Pump

Effects of Combination Impeller on the Flow Field and External Performance of an Aero-fuel Centrifugal Pump

Effect of cavitation and free-gas entrainment on the hydraulic performance of a centrifugal pump

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