Effect of meridian plane dip angle of the variable pitch inducer blade on cavitation performance of high-speed centrifugal pump

Cheng, Xiaorui; Jia, Ningning; B, Lv; Chen, Haishan

doi:10.1007/s40430-020-02289-3

Cited by 8 publications

(4 citation statements)

References 12 publications

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“…The Schnerr-Sauer model, Zwart model, and Kunz model are the most commonly used cavitation models. [22][23][24][25] In this study, we use the Zwart model since it can work better at high flow rates and it has a more stable computation speed and better convergence. 26 Although the Schnerr-Sauer model can also work for high-speed flow, 27 the variable setting for the evaporation coefficient and condensation coefficient for different cavitation coefficient conditions in the Schnerr-Sauer model can be ignored in this study.…”

Section: Methodsmentioning

confidence: 99%

Spatial and temporal features of cavitation in micropump by dynamic mode decomposing

Yu²,

Chen

2023

Proceedings of the Institution of Mechanical Engineers, Part A:

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This study investigates the spatial and temporal features of micropump cavitation. The numerical model is based on the k-Epsilon turbulence model and the Zwart cavitation model. Cases with different rotation speeds and flow volumes are carried out experimentally to validate the numerical model by changing rotation speed and flow rate separately. The periodic to chaos cavitation is observed by varying the cavitation number. Spatial modes of cavitation on the blade are identified by the dynamic mode decomposing. The frequencies of those modes are also obtained. The most energetic modes are presented and discussed. Cavitation of micropump on the suction side of the blade experiences growing, breaking, and shedding. With the decrease of cavitation number, the cavitation occurs at the leading-edge part, the middle part, and the entire blades. The leakage of cavitation can result in the interaction between cavitation between neighboring gaps of blades and the symmetrical distribution. The results also show that with the increase of cavitation number, there exists a downshift of frequency, and the bump point of the blade can influence the cavitation significantly.

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Section: Methodsmentioning

confidence: 99%

Spatial and temporal features of cavitation in micropump by dynamic mode decomposing

Yu²,

Chen

2023

Proceedings of the Institution of Mechanical Engineers, Part A:

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“…The geometric parameters of the impeller passages are parameterized by drawing the blade installation angle (β) and the relative streamline length (la) on a graph using parametrized blade profiles, which have a relationship expressed by a differential equation in equation (2). For this optimization design, a total of 15 geometric parameters of the passages are selected, including the inlet radius of the blade on the front cover (RS), inlet radius of the blade on the back cover (Rh), inlet edge radius (Rle), and the utilization of fourth-order Bezier curves to control the blade profiles of the shroud, middle, and hub with 12 Y-axis input parameters of control points.…”

Section: Parametrization Of Impeller Blade Geometrymentioning

confidence: 99%

“…Scholars have found that cavitation is the root cause of these phenomena. Cavitation induces non-steady blade loads and inter-blade interactions in high-speed centrifugal pumps, leading to asymmetric voids in blade passages [2]. Therefore, improving the cavitation resistance of high-speed centrifugal pumps under extreme conditions remains a pressing challenge.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Cavitation Performance of High-Speed Centrifugal Pump Based on the Meta-Model of optimal Prognosis

Wang,

Zhang,

Miao

et al. 2024

J. Phys.: Conf. Ser.

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Using a specific type of high-speed centrifugal pump as an example, this study conducted a parameterized optimization design on geometric parameters of the impeller’s flow path. A response sample space was generated with the flow path geometric parameters as input and pressure increment and cavitation volume as output. Based on the Meta-Model of optimal Prognosis, the optimal surrogate model was fitted, and a global sensitivity analysis was conducted. The results indicated that the impeller’s inlet edge parameter and mid-curve parameter had a significant impact on the pressure increment and cavitation volume of the pump. Using a genetic algorithm, the optimal flow path geometric parameters were obtained, and numerical simulation methods were applied to verify the obtained parameters. The results showed that after optimization, the pressure coefficient of the centrifugal pump increased by 0.035, and the cavitation performance improved by 22.28%. The impeller cavitation area and void volume were significantly reduced, and the flow path pressure distribution and flow state were improved.

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“…The head generated by the inducer can reduce the pump's Net Positive Suction Head (NPSH) and this will improve the pump's anti-cavitation performance [3][4][5][6][7][8][9][10]. The design of the inducer will affect the anti-cavitation performance of the pump [11][12][13]. The TC value of the inducer will affect the flow performance inside the inducer.…”

Section: Introductionmentioning

confidence: 99%

The Influence of Tip Clearance on the Performance of a High-Speed Inducer Centrifugal Pump under Different Flow Rates Conditions

et al. 2023

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The influence mechanism of the blade tip clearance (TC) of an inducer on the performance of a centrifugal pump at high speed was researched under different flow rate conditions in this work. An experiment on the pump’s external performance was carried out, and numerical calculation was also performed under four different TCs. The full characteristic performance curves, static pressure and pressure pulsation distributions of the pump were obtained. Through the research and analysis, it was found that the influence of the TC on the efficiency and the head of the centrifugal pump are related to the flow rate. Under the influence of a large flow rate, the increase in the TC is helpful to improve the efficiency and the head of the pump. The increase in the TC helps to weaken the gap jet effect on the inducer. The inlet jet of the inducer, caused by TC leakage, will form a low-pressure vortex zone at the inlet of the inducer. The splitter-bladed inducer’s pressure pulsation is affected by the TC. The peak pressure pulsation at the monitoring point at the short blades is larger than that at the long blades. With the increase in TC, the cavitation degree at the inlet of the long blade of the inducer is decreased, while the cavitation degree at the short blade is deepened. It is also found that the TC has little effect on the radial force of the inducer and the impeller. These results will provide the design basis for the tip clearance of an inducer.

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Effect of meridian plane dip angle of the variable pitch inducer blade on cavitation performance of high-speed centrifugal pump

Cited by 8 publications

References 12 publications

Spatial and temporal features of cavitation in micropump by dynamic mode decomposing

Spatial and temporal features of cavitation in micropump by dynamic mode decomposing

Optimization of Cavitation Performance of High-Speed Centrifugal Pump Based on the Meta-Model of optimal Prognosis

The Influence of Tip Clearance on the Performance of a High-Speed Inducer Centrifugal Pump under Different Flow Rates Conditions

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