Research of Modal Analysis for Impeller of Reactor Coolant Pump
Source abstract
Abstract
This paper studies the influence of added mass, centrifugal force and hydraulic load on natural frequencies of a Reactor Coolant Pump (RCP) impeller. A series of comparative studies under different conditions were carried out on a modal test bench and a simulation platform. Modal analysis of a full-scale RCP impeller was conducted by simulation, and an improved design of impeller was proposed to prevent hydraulic resonance. These results indicated that hydraulic load increases natural frequencies of the impeller. While the centrifugal force slightly reduces them, but it is negligible. Because the distribution of hydraulic load has an effect to natural frequencies, a solution of cutting inlet edges of blades can be used to increase the natural frequency that may cause hydraulic resonance. In summary, our research shows that both added mass and hydraulic load have a significant influence on natural frequencies of the RCP impeller, and redistributing the hydraulic load can alter natural frequencies of the impeller.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Hydraulic and Pneumatic Systems · Cavitation Phenomena in Pumps · Cyclone Separators and Fluid Dynamics
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
State Key Laboratory of Fluid Power & Mechatronic Systems, Zhejiang University, Hangzhou 310027, China
School of Engineering, Zhejiang University City College, Hangzhou 310015, China
College of Energy Engineering, Zhejiang University, Hangzhou 310027, China
Funding
National Basic Research Program of China · Science Fund for Creative Research Groups of the National Natural Science Foundation of China · Zhejiang Provincial Natural Science Foundation
References (25)
Show source-provided references
1. Transient flow analysis in reactor coolant pump systems during flow coastdown period10.1016/j.nucengdes.2010.09.033 ↗
2. Zhang, Y., Wang, X.F., Zhao, G., Xu, S.L., and Ye, Z. (2011, January 25–28). Numerical Analysis of Pressure Fluctuations Caused by Impeller-Diffuser Interaction in a Mixed Flow Reactor Coolant Pump. Proceedings of the 2011 Asia-Pacific Power and Energy Engineering Conference, Wuhan, China.10.1109/APPEEC.2011.5748956 ↗
3. Analysis of pressure pulsation induced by rotor-stator interaction in nuclear reactor coolant pump
4. Irradiation swelling, creep, thermal shock and thermal cycling fatigue analysis of cylindrical controlled thermonuclear reactor first wall10.1016/0029-5493(74)90086-7 ↗
5. Singh, M.P., Thakur, B.K., Sullivan, W.E., and Donald, G. (2003, January 8–11). Resonance Identification for Impellers. Proceedings of the 32nd Turbomachinery Symposium, Houston, TX, USA.
6. Modal behavior of a reduced scale pump turbine impeller. Part II: Numerical simulation10.1088/1755-1315/12/1/012117 ↗
7. Liang, Q.W., Rodríguez, C.G., Egusquiza, E., Escaler, X., and Avellan, F. (2006, January 17–21). Modal Response of Hydraulic Turbine Runners. Proceedings of the 23rd IAHR Symposium on Hydraulic Machinery and Systems, Yokohama, Japan.
8. Li, W. (2008). Modal and Response Analysis of Rotating Blade. [Ph.D. Thesis, Harbin Engineering University].
9. Experimental research on nature frequency of prestressed concrete beams
10. Zhang, Y.F. (2015). Investigation on Effect of Adhesive Water Condition to Wet Modal Response of Nuclear Coolant Pump Impeller. [Ph.D. Thesis, Dalian University of Technology].
11. Xu, S., He, X., Sun, T., and Wang, X. (2017, January 16–21). Research of Damping and Dynamic Stress for Impeller of Reactor Coolant Pump. Proceedings of the ISROMAC 2017 (International Symposium on Transport Phenomena and Dynamics of Rotating Machinery), Maui, HI, USA.
12. Measurement experiment, using NI USB-6008 data acquisition
13. Ewins, D.J., and Saunders, H. (1984). Modal Testing: Theory and Practice, Research Studies Press.
14. The spectral kurtosis: Application to the vibratory surveillance and diagnostics of rotating machines10.1016/j.ymssp.2004.09.002 ↗
15. A spectral simulation approach to evaluate probabilistic measurement precision of a reactor coolant pump torsional vibration shaft crack monitoring system10.1016/j.jsv.2007.08.028 ↗
16. Mathews, J.H., and Fink, K.D. (2010). Numerical Methods with MATLAB, Pearson Prentice Hall.
17. Yuan, D., Wang, P., Wong, X., and Wu, X. (2011, January 9–12). Design and Numerical Simulation on Guide Vane of AP1000 Reactor Coolant Pump. Proceedings of the International Conference on Consumer Electronics, Las Vegas, NV, USA.10.1109/CECNET.2011.5769092 ↗
18. Thompson, D. (2014, January 13–17). Railway Noise and Vibration: The Use of Appropriate Models to Solve Practical Problems. Proceedings of the 21st International Congress on Sound and Vibration, Beijing, China.
19. Research on the non-uniform inflow characteristics of the canned nuclear coolant pump10.1016/j.anucene.2018.02.007 ↗
20. Effect of boric acid concentration on reactor coolant pump performance in PWRs
21. Relationship between rotor/vanes blade number and modal diameter number of bladed-disk coupling vibration
22. Analysis and application of chorochronic periodicity in turbomachinery rotor/stator interaction computations10.2514/2.6065 ↗
23. Numerical simulations of the dependency of flow pattern on impeller clearance in stirred vessels10.1016/S0009-2509(01)00089-6 ↗
24. Bishop, R.E.D., and Johnson, D.C. (2011). The Mechanics of Vibration, Cambridge University Press.
25. Beards, C. (1996). Structural Vibration: Analysis and Damping, Elsevier.