Numerical and Experimental Investigation of Flow Induced Vibration of an Ejector Considering Cavitation

Document Type : Regular Article


Nuclear Power Institute of China, Chengdu, 610213, China



As one of the essential components of the conventional island in a nuclear power plant, the ejector supplies cooling water to the reactor core in an accident state. It needs serious maintenance for its structural stability. The flow-induced vibration of an ejector in service was numerically examined in this research while taking the cavitation phenomenon into account. To achieve this goal, a bidirectional fluid–structure interaction simulation based on the ANSYS platform was run. In our lab, an experimental loop was also set up to validate the fluid model. Then, under specific circumstances, it was possible to monitor the cavitation revolution process, pressure variation, and ejector vibration. According to the numerical results, the distribution of the vapor phase is largely found in the mixing and diverging portions, and it changes over time. In the ejector, a significant wideband excitation was observed. Additionally, the von Mises stress and flow-induced vibrational features of the ejector structure were investigated.


Main Subjects

Ashish, P., Ashish, K. D., & Singh, S. P. (2016). Experimental investigations on flow induced vibration of an externally excited flexible plate. Journal of Sound and Vibration, 371, 237-251.
Asi, O. (2006). Failure of a diesel engine injector nozzle by cavitation damage. Engineering Failure Analysis, 13, 1126-1133.
Banasiak, K., Hafner, A., & Andresen, T. (2012). Experimental and numerical investigation of the influence of the two-phase ejector geometry on the performance of the R744 heat pump. International Journal of Refrigeration, 35(6), 1617-1625.
Besagni, G., & Inzoli, F. (2017). Computational fluid-dynamics modeling of supersonic ejectors: Screening of turbulence modeling approaches. Applied Thermal Engineering, 17, 122-144.
Dai, B., Liu, C., Liu, S., Wang, D., Wang, Q., Zou, T., & Zhou, X. (2023). Life cycle techno-enviro-economic assessment of dual-temperature evaporation transcritical CO2 high-temperature heat pump systems for industrial waste heat recovery. Applied Thermal Engineering, 219, 119570.
Haghparast, P., Sorin, M. V., & Nesreddine, H. (2018). The impact of internal ejector working characteristics and geometry on the performance of a refrigeration cycle. Energy, 162, 728-743.  
Javadi, M., Noorian, M. A., & Irani, S. (2021). Nonlinear vibration analysis of cracked pipe conveying fluid under primary and superharmonic resonances. International Journal of Pressure Vessels and Piping, 191, 104326.
Joshi, S., Franc, J. P., Ghigliotti, G., & Fivel, M. (2019). SPH modeling of a cavitation bubble collapse near an elasto-visco-plastic material. Journal of the Mechanics and Physics of Solids, 125, 420-439.
Li, W., Zhang, H., & Qu, W. (2021). Stress response of a straight hydraulic pipe under random vibration. International Journal of Pressure Vessels and Piping, 194, 104502.
Liu, P., Li, F., Chen, B., & Zhang, S. (2019). Theoretical investigations on flow-induced vibration of fuel rods with spacer grids in axial flow. Annals of Nuclear Energy, 133, 916-923.
Menter, F. R. (1994). Two-equation eddy-viscosity turbulence models for engineering applications. AIAA Journal, 32(8), 1598-1605.
Park, J., Lee, S., Lee, E., Park, N., & Kim, Y. (2019). Seismic responses of nuclear reactor vessel internals considering coolant flow under operating conditions. Nuclear Engineering and Technology, 51, 1658-1668.
Ruangtrakoon, N., Thongtip, T., Aphornratana, S., & Sriveerakul, T. (2013). CFD simulation on the effect of primary nozzle geometries for a steam ejector in refrigeration cycle. International Journal of Thermal Science, 63, 133-145.
Santis, D. D., Kottapalli, S., & Shams, A. (2018). Numerical simulations of rod assembly vibration induced by turbulent axial flows. Nuclear Engineering and Design, 335, 94-105.
Sarkar, P., Ghigliotti, G., Franc, J. P., & Fivel, M. (2021). Mechanism of material deformation during cavitation bubble collapse. Journal of Fluids and Structures, 105, 103327.
Tang, T., Gao, L., Li, B., Liao, L., Xi, Y., & Yang, G. (2019). Cavitation optimization of the throttle orifice plate based on three-dimensional genetic algorithm and topology optimization. Structural and Multidisciplinary Optimization, 60, 1227-1244.
Xie, Z., Song, P., Hao, L., Shen, N., Zhu, W., Liu, H., Shi, J., Wang, Y., & Tian, W. (2020). Investigation on effects of Fluid-Structure-Interaction (FSI) on the lubrication performances of water lubricated bearing in primary circuit loop system of nuclear power plant. Annals of Nuclear Energy, 141, 107355.
Zhang, Y., Sun, L., & He, C. (2022). Flow induced vibration investigation of a main steam pipe suffering from high temperature steam flow. Progress in Nuclear Energy, 143, 104040.
Zwart, P. J., Gerber, A. G., & Belamri, T. (2004). A two-phase flow model for predicting cavitation dynamics. Fifth International Conference on Multiphase Flow, Yokohama, Japan.
Volume 17, Issue 1 - Serial Number 81
January 2024
Pages 251-260
  • Received: 28 April 2023
  • Revised: 02 September 2023
  • Accepted: 13 September 2023
  • Available online: 01 November 2023