CFD Analysis of Two-Phase Cavitating Flow in a Centrifugal Pump with an Inducer

Paul, Debarpan; Agarwal, Himanshu; Ponangi, Babu Rao

doi:10.1007/978-981-15-7779-6_2

Cited by 4 publications

(4 citation statements)

References 8 publications

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“…If I = I1, the β value of each section of the pump shaft can be calculated according to formula (14), and the results are shown in Table 8. Bring the parameters in Table 8 into formula (9) to get the reciprocal of the total section moment of inertia of the pump shaft, then bring formula (10) and the reciprocal of the solved total section moment of inertia into formula (8), and integrate the results once to get the angle equation θ(x), such as formula (11).…”

Section: ) Solution Of Pump Shaft Deflection 1) Solution Of Bending M...mentioning

confidence: 99%

Study on optimization of transmission system of plastic centrifugal pump

Zhang

Wang

Wen

et al. 2022

Preprint

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Because of the influence of the structural parameters of the pump shaft transmission system on the dynamic and static performance of the plastic centrifugal pump, according to the structural parameters of the centrifugal pump, the three-dimensional model of the impeller and volute chamber was drawn. The composition of radial force and axial force generated when the plastic centrifugal pump works were analyzed. The CFD calculation of the load of the plastic centrifugal pump was carried out. The flow field of the plastic centrifugal pump under ideal working conditions was simulated by ANSYS FLUENT. Combined with the application principle of singular function in mechanics, the mathematical model of the deflection of the pump shaft transmission system was constructed. And the key factors affecting the deflection of the pump shaft were analyzed. Taking the minimum deflection and the maximum critical speed of the first order as the objective function, the constraint conditions were determined by the geometric relationship, and the optimization model of the structural parameters of the pump transmission system was established. The NSGA-II multi-objective optimization method was used to solve the optimal structural parameters of the optimization model, and the optimization design of pump shaft span, cantilever, front and rear bearing clearance was completed. The optimal span cantilever ratio of the rotor model of the single-span cantilever structure was 1:0.75. The ZT-3 rotor test device was used as a platform to verify the effect of span and cantilever ratio on the dynamic performance of the rotor.

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Section: ) Solution Of Pump Shaft Deflection 1) Solution Of Bending M...mentioning

confidence: 99%

Study on optimization of transmission system of plastic centrifugal pump

Zhang

Wang

Wen

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

“…Based on the fluid continuity equation, Navier-Stokes equation, and turbulent mode theory, CFD [9,14] is used to simulate the flow field of a plastic centrifugal pump. Since the material is water at room temperature, the incompressible fluid continuity equation is chosen.…”

Section: Cfd Calculation Of Plastic Centrifugal Pump Loadmentioning

confidence: 99%

“…If I � I 1 , the β value of each section of the pump shaft can be calculated according to formula (18), and the results are shown in Table 10. Bring the parameters in Table 10 into formula (15) to get the reciprocal of the total section moment of inertia of the pump shaft, then bring formula (17) and the reciprocal of the solved total section moment of inertia into formula (14) and integrate the results once to get the angle equation θ (x), such as e deflection curve equation y (x) can be obtained by integrating the angle equation θ(x) again:…”

Section: Deflection Analysis Of Pump Shaft Of the Plastic Centrifugal...mentioning

confidence: 99%

Study on Optimization of Pump Shaft Transmission System of Plastic Centrifugal Pump

Zhang

Tang

Wen

et al. 2022

Journal of Engineering

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At present, the design of the pump shaft transmission system mostly refers to the design method of the metal pump transmission system. The dynamic and static characteristics of the plastic centrifugal pump are not related to the structural parameters of the pump shaft. Aiming at the influence of the structural parameters of the pump shaft transmission system on the dynamic and static performance of the plastic centrifugal pump, the three-dimensional model of the impeller and volute chamber was drawn by Creo5.0. The CFD calculation of the load of the plastic centrifugal pump was carried out. The flow field of the plastic centrifugal pump under ideal working conditions was simulated by ANSYS FLUENT. Combined with the application principle of singular function in mechanics, the mathematical model of a deflection of the pump shaft transmission system was constructed. Considering the minimum deflection and the maximum critical speed of the first order as the objective function, an optimization model of the structural parameters of the pump transmission system was established. The NSGA-II multiobjective optimization method was used to solve the optimal structural parameters of the optimization model, and the optimization design of the pump shaft span, cantilever, front, and rear bearing clearance was completed. The optimal span cantilever ratio of the rotor model of the single span cantilever structure was 1:0.75. Compared with the traditional design model, the optimized pump shaft deflection is reduced by 52.35%, and the first-order critical speed is increased by 42.77%. Simultaneously, using polynomial fitting as a mathematical tool, the experimental data were analyzed, and the mathematical expression of the rotation speed deflection relationship of the pump shaft at the first critical rotation speed and the corresponding function curve was obtained.

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“…As a result, increase of the rotational speed made the anti-cavitation performance worse. The Paul et al 23 showed that the inducer is effective in reducing the cavitation by comparing the pump with and without an inducer. However, the studies are focused on the reduction of hydraulic performance without showing the internal flow field and the trend of head breakdown.…”

Section: Introductionmentioning

confidence: 99%

Numerical study on the effects of installing an inducer on a pump in a turbopump

Kim

Choi

Kim

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part A:

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In a projectile, a turbopump is widely used to pressurize oxidizer and fuel to gain high thrust instead of using high pressure tank which has a disadvantage in total weight. Pumps in a turbopump employ an inducer upstream to prevent performance degradation by increasing pressure at the impeller inlet. However, cavitation and related instabilities take place frequently, so numerous analysis have been conducted for turbopumps. In this study, the pumps with and without an inducer were numerically studied using ANSYS CFX 13.0 to analyze the effects of installing an inducer, which was rarely treated before. By comparing these two pumps, the merits and demerits of installing an inducer can be analyzed in the aspects of hydraulic/suction performances and internal flow characteristics. Also, the role of an inducer can be understood in both of non-cavitating and cavitating conditions. As a result, head rise and efficiency of the pump were degraded by installing an inducer in non-cavitating conditions. The inducer could not play a role at high flow rate, and efficiency of the inducer was steeply declined in the off-design conditions. However, suction performance of the pump was greatly improved by adopting the inducer. Head of the pump with an inducer abruptly decreased at the low cavitation numbers, while head of the pump without an inducer started to decline gradually at the high cavitation numbers. In spite of high cavitation number, severe cavitation appeared in the case without an inducer, so it can be said that installing an inducer can prevent performance deterioration from the cavitation and satisfies stable operation which is more important for pumps rather than obtaining high hydraulic performance.

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CFD Analysis of Two-Phase Cavitating Flow in a Centrifugal Pump with an Inducer

Cited by 4 publications

References 8 publications

Study on optimization of transmission system of plastic centrifugal pump

Study on optimization of transmission system of plastic centrifugal pump

Study on Optimization of Pump Shaft Transmission System of Plastic Centrifugal Pump

Numerical study on the effects of installing an inducer on a pump in a turbopump

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