Geometrical Optimization of an Inducer with Respect to Rotating
                        Cavitation Generated Radial Forces by using an Orthogonal Experiment

Yu, Li-Wei; Zhang, H. C.; Chen, H.; Li, Y. P.; Zuo, Zhigang; Liu, S.

doi:10.29252/jafm.11.06.29141

Cited by 7 publications

(2 citation statements)

References 16 publications

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“…Among the complex cavitation instabilities, rotating cavitation (RC) is considered to make a primary contribution to the disastrous damage to inducers, leading to performance drop, severe vibrations and noise [4][5][6]. One prominent characteristic of RC is the strong interaction between the tip leakage flow and the main flow in the inter-blade flow passages, leading to imbalance in the radial force exerted on the inducer [7,8].…”

Section: Introductionmentioning

confidence: 99%

Influence of Step Casings on the Cavitation Characteristics of Inducers

Han

Geng

Lian³

et al. 2022

Processes

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Rotating cavitation (RC) in inducers mainly degrades performance with unstable radial force. In this paper, the influence of step casings on cavitation performance and the instabilities of inducers were numerically investigated. Firstly, a numerical scheme was validated by means of a comparison with experimental measurements taken for an original inducer (Model O). We then performed simulations with five different step casing models (Models A–E), in which the starting locations and enlargement sizes of the step casings were altered. The interaction between tip leakage flow and main flow in the inter-blade passages was found to highly affected by cavity structure and blade loading. Considering both cavitation performance and radial force, our results suggest that Model E is an alternative improvement. In short, this study provides a standard workflow for the effective suppression of rotating cavitation in inducers by the simple adoption of the step casing configuration presented here in engineering practice.

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Section: Introductionmentioning

confidence: 99%

Influence of Step Casings on the Cavitation Characteristics of Inducers

Han

Geng

Lian³

et al. 2022

Processes

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“…In turbine and propeller research the working liquid is usually water at the room temperature [3][4][5][6][7]. In such studies the cavitation number frequencies of cavitation cloud shedding [13,[15][16][17][18] are applicable for characterizing different cavitation patterns.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic effects on Venturi cavitation characteristics

Zhang

Zuo

Mørch³

et al. 2019

Physics of Fluids

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In this paper the thermodynamic effect is systematically studied by Venturi cavitation in a blow-down type tunnel for the first time, using water at temperatures up to relatively high levels, and at controlled dissolved gas contents in the supply reservoir (measured by dissolved oxygen, DO). The mean attached cavity length cav L   is chosen to reveal the thermodynamic effect, and the cavitation characteristics are analyzed from the experiments. With an increase of the thermodynamic parameter *  , a decrease of cav L   vs. the pressure recovery number κ is observed, which is consistent with suppression of cavitation by the thermodynamic effect, but the decrease is related not only to this effect. Based on the experimental results, a model is presented of the attached cavity cloud that develops from the Venturi throat. It is found that either the length of this cloud oscillates stably around a mean value, or the cloud breaks regularly at some upstream position, allowing that a detached cavity cloud is shed, flows downstream and collapses, while the remaining attached cloud regenerates. Applying this model to experimental results obtained first with cold water, then with hot water, we find that when the mean length of the attached cavity cloud oscillates stably, temperature increase causes reduction of the mean cavitation length. This is interpreted to be a consequence of the thermodynamic effect. When detachment of large cavity clouds occurs, the mean length is increased at temperature increase. This is a consequence of cloud configuration changes being superposed on changes due to the thermodynamic effect. These observations explain conflicting results reported for attached cavity clouds in relation to the thermodynamic effect. The gas content in the water is found to be without significance within the range of dissolved oxygen tested.

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Study on Pressure Pulsation Induced by Cavitation at the Tongue of the Volute in a Centrifugal Pump

Luo

et al. 2022

Arab J Sci Eng

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Geometrical Optimization of an Inducer with Respect to Rotating Cavitation Generated Radial Forces by using an Orthogonal Experiment

Cited by 7 publications

References 16 publications

Influence of Step Casings on the Cavitation Characteristics of Inducers

Influence of Step Casings on the Cavitation Characteristics of Inducers

Thermodynamic effects on Venturi cavitation characteristics

Study on Pressure Pulsation Induced by Cavitation at the Tongue of the Volute in a Centrifugal Pump

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