Abstract
The cavitation is very common in a centrifugal pump, especially when the speed is very high, and it seriously influences the centrifugal pump performance. In this investigation, the RNG k-ε turbulence model and the cavitation model with consideration of the mass transferring are first used to simulate the cavitation performance of the high-speed centrifugal pump without taking any measure for improving the pump cavitation performance. The calculation results reveal that a number of bubbles appear in the centrifugal pump flow channel, and the head as well as the flow rate of the high-speed centrifugal pump are far from its design condition. The cavitation performance can be improved effectively by arranging a variable pitch inducer and adopting an annular nozzle scheme. The flow field analysis of the pump is conducted to obtain the suitable working temperature distribution at different void fractions. On one hand, with the same void fraction, the head of the centrifugal pump drops slowly with the increase of temperature. However, when the temperature exceeds 90℃, the head of the pump drops rapidly. On the other hand, at the constant temperature, the higher the void fraction, the worse the cavitation performance. This research conducted under different temperatures and void fractions provides some guidance for designing an effective high-speed centrifugal pump.
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Lettieri C., Spakovszky Z., Jackson D. et al. Characterization of cavitation instabilities in a four-bladed turbopump inducer [J]. Journal of Propulsion and Power, 2018, 34(2): 510–520.
Campos-Amezcua R., Bakir F., Campos-Amezcua A. et al. Numerical analysis of unsteady cavitating flow in an axial inducer [J]. Applied Thermal Engineering, 2015, 75(SI): 1302–1310.
Gao X. M., Zhu Z. C., Cui B. L. et al. Effects of the number of inducer blades on the anti-cavitation characteristics and external performance of a centrifugal pump [J]. Journal of Mechanical Science and Technology, 2016, 30(7): 3173–3181.
Ji B., Luo X. W., Arndt R. et al. Numerical simulation of three dimensional cavitation shedding dynamics with special emphasis on cavitation-vortex interaction [J]. Ocean Engineering, 2014, 87: 64–77.
Huang M., Kim K., Suh S. H. Numerical and experimental investigation of cavitation flows in a multistage centrifugal pump [J]. Journal of Mechanical Science and Technology, 2018, 32(3): 1071–1078.
Okita K., Ugajin H., Matsumoto Y. H. Numerical analysis of the influence of the tip clearance flows on the unsteady cavitating flows in a three-dimensional inducer [J]. Journal of Hydrodynamics, 2009, 21(1): 34–40.
Lee K. H., Choi J. W., Kang S. H. Cavitation performance and instability of a two-bladed inducer [J]. Journal of Propulsion and Power, 2012, 28(6): 1168–1175.
Tamura Y., Matsumoto Y. Improvement of bubble model for cavitating flow simulations [J]. Journal of Hydrodynamics, 2009, 21(1): 41–46.
Choi Y. D., Kurokawa J., Imamura H. Suppression of cavitation in inducers by J-Grooves [J]. Journal of Fluids Engineering, 2007, 129(1): 15–22.
Saha S. L., Kurokawa J., Matsui J. et al. Suppression of performance curve instability of a mixed flow pump by use of J-groove [J]. Journal of Fluids Engineering, 2000, 122(3): 592–597.
Saha S. L., Kurokawa J., Matsui J. et al. Passive control of rotating stall in a parallel-wall vaned diffuser by J-grooves [J]. Journal of Fluids Engineering, 2001, 123(3): 507–515.
Flores N. G., Goncalves E., Patella R. F. et al. Head drop of a spatial turbopump inducer [J]. Journal of Fluids Engineering, 2008, 130(11): 111301.
Yoshida Y., Eguchi M., Motomura T. et al. Rotordynamic forces acting on three-bladed inducer under supersynchronous/synchronous rotating cavitation [J]. Journal of Fluids Engineering, 2010, 132(6): 061105.
Zhang Y., Luo X. W., Ji B. et al. A thermodynamic cavitation model for cavitating flow simulation in a wide range of water temperatures [J]. Chinese Physics Letters, 2010, 27(1): 016401.
Yu A., Luo X. W., Ji B. Analysis of ventilated cavitation around a cylinder vehicle with nature cavitation using a new simulation method [J]. Science Bulletin, 2015, 60(21): 1833–1839.
Li Z., Zheng D., Hong F. et al. Numerical simulation of the sheet/cloud cavitation around a two-dimensional hydrofoil using a modified URANS approach [J]. Journal of Mechanical Science and Technology, 2017, 31(1): 215–224.
Cheng H. Y., Long X. P., Liang Y. Z. et al. URANS simulations of the tip-leakage cavitating flow with verification and validation procedures [J]. Journal of Hydrody-namics, 2018, 30(3): 531–534.
Li D. Q., Grekula M., Lindell P. Towards numerical prediction of unsteady sheet cavitation on hydrofoils [J]. Journal of Hydrodynamics, 2010, 21(5Suppl.): 699–704.
Yu H., Goldsworthy L., Brandner P. A. et al. Development of a compressible multiphase cavitation approach for diesel spray modelling [J]. Applied Mathematical Modelling, 2017, 45: 705–727.
Asnaghi A., Feymark A., Bensow R. E. Improvement of cavitation mass transfer modeling based on local flow properties [J]. International Journal of Multiphase Flow, 2017, 93: 142–157.
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Project supported by the National Natural Science Foundation of China (Grant No. 51279145).
Biography: Jin Jiang (1963-), Male, Ph. D., Professor
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Jiang, J., Li, Yh., Pei, Cy. et al. Cavitation performance of high-speed centrifugal pump with annular jet and inducer at different temperatures and void fractions. J Hydrodyn 31, 93–101 (2019). https://doi.org/10.1007/s42241-019-0011-7
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DOI: https://doi.org/10.1007/s42241-019-0011-7