Design and Numerical Characterization of a First Stage of a High Capacity Multistage Centrifugal Pump

Roche-Carrier, Nicolas La; Ngoma, Guyh Dituba; Ghié, Walid

doi:10.5220/0005995102830290

Cited by 2 publications

(2 citation statements)

References 3 publications

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“…In the formula, b is the parameter of the Newmark-b method; q is the generalized coordinate of the rotor. Equation (1) shows that if the instantaneous t, the displacement q t , velocity _ q t and acceleration € q t and the displacement q tþDt of the node at t þ Dt are known, the velocity _ q tþDt and acceleration € q tþDt of the node at t þ Dt could be obtained by this method. With such recursion, the displacement, velocity and acceleration of each node at any instant after instant t can be obtained.…”

Section: Mathematical Model For Solving Transient Responsementioning

confidence: 99%

“…Because of the unique advantages of compact structure, reliability, easy installation and convenient maintenance, the cantilever multistage centrifugal pump is gradually substituting for the traditional double-supported multi-stage centrifugal pump in many fields, such as the water supply system, petrochemical, metallurgical power, water conservancy project and agricultural irrigation. 1 However, the critical questions of the stability of the multistage pumps include axial force balance, 2 characteristics of rotor dynamic, 3 and anti-wear performance of overflow components. In the process of heightening the performance by improving the structure of multistage pump, the problem rotor dynamic characteristics facing with is rather complex and hard for deeper research.…”

Section: Introductionmentioning

confidence: 99%

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Transient response analysis of cantilever multistage centrifugal pump based on multi-source excitation

Jiang

Zhou

et al. 2019

Journal of Low Frequency Noise, Vibration and Active Control

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A stainless-steel cantilever multistage centrifugal pump was taken to study the transient response characteristic. The axial locus under different working conditions was tested experimentally and compared in detail. The results show that the gyroscopic effect increases the radial displacement located near the end element, and the amplitude of the radial displacement of the pump body increases with the development of unbalance mass. The dynamic sealing force of wear-ring could enhance the stability of the rotor system, and effectively reduce the amplitude of the radial displacement. The axis locus under variable flow rates is different when the fluid excitation was loaded. The increasing tendency of the maximal radial displacement appears exponential with the enhancement of fluid added mass when heterogeneous fluid added mass is taken into consideration. The experimental results exhibit that the axis locus is various under different working conditions, and there exists misalignment and eccentricity phenomenon in the multi-stage pump rotor system.

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Section: Mathematical Model For Solving Transient Responsementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Transient response analysis of cantilever multistage centrifugal pump based on multi-source excitation

Jiang

Zhou

et al. 2019

Journal of Low Frequency Noise, Vibration and Active Control

View full text Add to dashboard Cite

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Optimization of cavitation performance and hydraulic performance of multistage pump based on response surface method

Chen,

Hui,

Zhipeng

et al. 2024

Advances in Mechanical Engineering

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The structural parameters of the first stage impeller have an important influence on the performance of multistage pumps, and the purpose of our study is to find the most significant factors affecting the performance of double-casing multistage pumps, and then to carry out a comprehensive optimization of the hydraulic performance and cavitation performance. With the Plackett-Burman design method, we made a notability analysis on impeller parameters, and the three control variables that are most sensitive to performance of multistage pumps were found. Based on the response surface method, we carried out the central composite design experiments for the sensitive control variables, and established the multiple regression model between the sensitive parameters and the performance parameters. By solving the regression model, the most significant parameters affecting the performance were obtained: impeller outlet angle, outlet diameter and wrap angle. After analyzing the interaction between impeller parameters, it was found that the optimal hydraulic performance and the optimal NPSHr will constrain each other, and the optimal parameter combination with the lowest NPSHr and the hydraulic performance not lower than that of original model is impeller outlet diameter, D21 = 292 mm, the impeller outlet angle, β21 = 19°, and the wrap angle, φ1 = 160°.

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Design and Numerical Characterization of a First Stage of a High Capacity Multistage Centrifugal Pump

Cited by 2 publications

References 3 publications

Transient response analysis of cantilever multistage centrifugal pump based on multi-source excitation

Transient response analysis of cantilever multistage centrifugal pump based on multi-source excitation

Optimization of cavitation performance and hydraulic performance of multistage pump based on response surface method

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