International Journal of Naval Architecture and Ocean Engineering

The Society of Naval Architects of Korea (대한조선학회)
권호 표지
DOI QR코드

DOI QR Code

Performance of water-jet pump under acceleration

  • Wu, Xian-Fang (School of Energy and Power Engineering, Jiangsu University) ;
  • Li, Ming-Hui (The Research Center of Fluid Mechanical Engineering Technology, Jiangsu University) ;
  • Liu, Hou-Lin (The Research Center of Fluid Mechanical Engineering Technology, Jiangsu University) ;
  • Tan, Ming-Gao (The Research Center of Fluid Mechanical Engineering Technology, Jiangsu University) ;
  • Lu, You-Dong (The Research Center of Fluid Mechanical Engineering Technology, Jiangsu University)
  • Received : 2021.01.20
  • Accepted : 2021.10.27
  • Published : 2021.11.30
Download PDF
⟨ Previous Next ⟩

Abstract

The instantaneous acceleration affects the performance of the water-jet pump obviously. Here, based on the user-defined function, the method to simulate the inner flow in water-jet pumps under acceleration conditions was established. The effects of two different acceleration modes (linear acceleration and exponential acceleration) and three kinds of different acceleration time (0.5s, 1s and 2s) on the performance of the water-jet pump were analyzed. The results show that the thrust and the pressure pulsation under exponential acceleration are lower than that under linear acceleration at the same time; the vapor volume fraction in the impeller under linear acceleration is 27.3% higher than that under exponential acceleration. As the acceleration time increases, the thrust gradually increases and the pressure pulsation amplitude at the impeller inlet and outlet gradually decreases, while the law of pressure pulsation is the opposite at the diffuser outlet. The main frequency of pressure pulsation at the impeller outlet is different under different acceleration time. The research results can provide some reference for the optimal design of water-jet pumps.

Keywords

Acknowledgement

This work was supported by the National Natural Science Foundation of China under Grant 51779108, 52179084 and 51979124; And the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD).

References

  1. Alexander, K.V., Coop, H., van Terwisga, T., 1994. Waterjet-hull interaction: recent experimental results. SNAME Transactions 102, 275-335.
  2. Chen, H.Q., 2008. Simulation analysis of matching characteristics of marine waterjet propulsion system. Ship 19 (6), 47-50, 58.
  3. Cheng, H.Y., Bai, X.R., Long, X.P., Ji, B., Peng, X.X., Farhat, M., 2020. Large eddy simulation of the tip-leakage cavitating flow with an insight on how cavitation influences vorticity and turbulence. Appl. Math. Model. 77.
  4. Cheng, H.Y., Ji, B., Long, X.P., Huai, W.X., Mohamed, Farhat, 2021. A review of cavitation in tip-leakage flow and its control. J. Hydrodyn. (prepublish).
  5. Han, X.L., 2008. Numerical simulation of the influence of rotation speed on the performance of water-jet pump. Chuanhai Eng. (2), 134-137.
  6. Han, Y., 2019. The Study of Transient Characteristics on Screw Mixed-Flow Water-Jet Pump during Startup Period. Lanzhou University of Technology, Lanzhou, China.
  7. Han, W., Han, Y., Gong, P.F., Wang, J., Xu, D.D., 2019. Numerical study on pressure fluctuation of screw mixed flow water jet propulsion pump. Hydropower Energy Sci. 37 (3), 136-139. + 149.
  8. Hong, G., Wan, L.L., Zhao, H.D., 2008. Numerical flow and performance analysis of a water-jet axial flow pump. Ocean Eng. 35 (16).
  9. Hu, H.P., Shi, H.P., Chai, L.P., Li, S.X., Xia, X., 2016. Experimental study on the influence of rotation speed on the performance of micro water-jet pump. J. Hefei Univ. Technol. (Nat. Sci.) 39 (6), 725-729.
  10. Kong, Q.F., Chen, G.J., Zeng, F.M., 2005. Mathematical modeling and dynamic simulation of marine waterjet propulsion system. J. Syst. Simul. (12), 2844-2848.
  11. Lawson, W., 2004. Development of a New Outboard Waterjet Propulsion System for Life Boat Use. International Conference on Waterjet Propulsion IV. London, UK.
  12. Li, X.H., Zhu, Y.Q., Nie, S.L., 2007. Review on the development of water-jet propulsion. Hydraulic Pneumatic (7), 1-4.
  13. Liu, C.J., Wang, Y.S., Ding, J.M., Sun, C.L., 2006. Evolution of modern water-jet propulsion device. Naval Ship Sci. Technol. 28 (4), 8-12.
  14. Liu, C.J., Ding, J.M., Su, Y.S., Gu, C.Z., 2018. Numerical simulation and experimental verification of cavitation performance of water jet propulsion pump. Ship Mech. 22 (1), 38-44.
  15. Marin, K., 2011. Verification and validation study of URANS simulations for an axial waterjet propelled large high-speed ship. J. Mar. Sci. Technol. 16 (4), 434-447. https://doi.org/10.1007/s00773-011-0138-x
  16. Meng, K.X., Pan, Z.Y., Wang, X.B., 2019. Pressure fluctuation analysis of water jet thruster at different speeds. J. Drain. Irrig. Machinery Eng. 37 (3), 224-231.
  17. Okamoto, Y., 1993. On the pressure distribution of a waterjet intake duct in self propulsion conditions. Proceedings of FAST'93 1, 843-854.
  18. Shen, Z.H., Pan, Z.Y., Li, H., Pan, X.W., Huang, Z.j., 2014. Speed control method of counter rotating axial-flow water-jet pump based on CFD. J. Drain. Irrig. Mech. Eng. 32 (11), 931-936.
  19. Sun, C.L., Wang, Y.S., Huang, B., 2011. Study on the performance of marine waterjet propeller under special working conditions. J. Harbin Eng. Univ. 32 (7), 867-872. https://doi.org/10.3969/j.issn.1007-7043.2011.07.006
  20. Wang, Y.S., Ding, J.M., Ao, C.Y., Chen, H.Q., Zhang, Y.S., 2005. Study on the correlation between power characteristics and speed of waterjet propulsion. J. Naval Eng. Univ. (3), 22-26.
  21. Wei, H., Ting, S.M., Su, C.Y., Gong, R.N., Li, B.M., 2019. Direct sailing variable acceleration dynamics characteristics of water-jet propulsion with a screw mixed-flow pump. Appl. Sci. 9 (19).
  22. Xu, S., Long, X.P., Ji, B., Li, G.B., Song, T., 2019. Vortex dynamic characteristics of unsteady tip clearance cavitation in a waterjet pump determined with different vortex identification methods. J. Mech. Sci. Technol. 33 (12).
  23. Zong, P., Pan, Z.Y., Cen, C.H., 2020. Effect of deflector angle on performance of reversing bucket of water jet propulsion. J. Drainage Irrigation Mechan. Eng. 38 (12), 1251-1257.