An Analysis of the Effect of Cavitation on Rotor–Stator Interaction in a Bidirectional Bulb Tubular Pump
Abstract
:1. Introduction
2. Experimental Setup
3. Numerical Simulation Setup
3.1. Governing Equations
3.2. Turbulence Model
3.3. Cavitation Model
3.4. Numerical Simulation Calculation Setup
3.5. Grid Independence Analysis
3.6. Verification of the Accuracy of External Characteristic Curves and Numerical Simulations
4. Results and Analysis
4.1. Time-Domain Analysis of Pressure Pulsation
4.2. Analysis of Pressure Pulsation
4.3. Analysis of Flow Field at Low Flow Rates
5. Conclusions
- (1)
- Through the analysis of pressure pulsation data obtained from experiments at different locations before and after cavitation, it is observed that the emergence of cavitation enhances the rotor–stator interaction effect. Under certain operating conditions, the dominant and secondary frequencies observed before cavitation may switch under the influence of rotor–stator interaction after cavitation occurs;
- (2)
- As indicated by an analysis of the amplitude of the dominant frequency in the pressure pulsation frequency domain, rotor–stator interaction occurs in both the FVP and RVP. It has a more pronounced effect on pressure pulsation in the FVP compared to the RVP, particularly under low-flow conditions.
- (3)
- Through numerical simulation of the flow field, the presence of the front guide vanes in a bidirectional submerged tubular pump causes a certain deviation in the flow field during forward operation, resulting in unstable and non-smooth flow into the impeller, which exacerbates rotor–stator interaction within the FVP.
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Bidirectional Bulb Tubular Pump | Axial Flow Pump [19] | Centrifugal Pump [20] | |
---|---|---|---|
Design Flow Rate (L/s) | 285 | 203 | 2.78 |
Design Head/m | 2.84 | 2.01 | 20 |
Rotational Speed (r/min) | 1264 | 1000 | 980 |
Diameter of Impeller (mm) | 300 | 300 | 425 |
No Cavitation | Cavitation Occurs | |
---|---|---|
Inlet Pressure/atm | 0.93 | 0.83 |
Flow Rate/(L⋅s−1) | 228 | 228 |
Cavitation Number | 0.49 | 0.45 |
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Zhou, Y.; Duan, W.; Liu, H.; Yang, X.; Hu, J.; Sun, D.; Yan, S. An Analysis of the Effect of Cavitation on Rotor–Stator Interaction in a Bidirectional Bulb Tubular Pump. J. Mar. Sci. Eng. 2025, 13, 138. https://doi.org/10.3390/jmse13010138
Zhou Y, Duan W, Liu H, Yang X, Hu J, Sun D, Yan S. An Analysis of the Effect of Cavitation on Rotor–Stator Interaction in a Bidirectional Bulb Tubular Pump. Journal of Marine Science and Engineering. 2025; 13(1):138. https://doi.org/10.3390/jmse13010138
Chicago/Turabian StyleZhou, Yucheng, Wenyong Duan, Haiyu Liu, Xiaodong Yang, Jing Hu, Dawang Sun, and Shikai Yan. 2025. "An Analysis of the Effect of Cavitation on Rotor–Stator Interaction in a Bidirectional Bulb Tubular Pump" Journal of Marine Science and Engineering 13, no. 1: 138. https://doi.org/10.3390/jmse13010138
APA StyleZhou, Y., Duan, W., Liu, H., Yang, X., Hu, J., Sun, D., & Yan, S. (2025). An Analysis of the Effect of Cavitation on Rotor–Stator Interaction in a Bidirectional Bulb Tubular Pump. Journal of Marine Science and Engineering, 13(1), 138. https://doi.org/10.3390/jmse13010138