Abstract
Cavitation commonly occurs in the hydraulic machineries like inducers. Existing computational fluid dynamics could provide relatively precise prediction for water, but may fail to simulate the cryogens cavitation precisely. Based on the modified Merkle cavitation model, this paper studies the cavitation suppression in an inducer in thermo-sensitive fluid with special emphasis on thermodynamic effect. The cavitation characteristics of an inducer under different working conditions for water and liquid nitrogen were analyzed systematically. Through the comparative analysis of the cavitation morphology, temperature drop, axial vapor volume fraction and axial pressure distribution, the cavitation in water was found to be very large and continuous, whereas that in liquid nitrogen was found to be relatively small and discontinuous, indicating that the stronger thermodynamic effect in liquid nitrogen can effectively suppress the development of cavitation. The cavitation performance of inducer showed good improvement in liquid nitrogen than that in water.
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Acknowledgements
This work is supported financially by National Natural Science Foundation of China (Grant No. 51776087 and 51979125), the Senior Talent Foundation of Jiangsu University (Grant No. 18JDG034), the Open Research Subject of Key Laboratory (Fluid Machinery and Engineering Research Base) of Sichuan Province (Grant No. szjj2019-028) and the Jiangsu Planned Projects for Postdoctoral Research Funds (Grant No. 2018K102C).
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Xu, B., Feng, J., Shen, X. et al. Numerical investigation of cavitation suppression in an inducer for water and liquid nitrogen with emphasis on thermodynamic effect. J Braz. Soc. Mech. Sci. Eng. 43, 212 (2021). https://doi.org/10.1007/s40430-021-02947-0
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DOI: https://doi.org/10.1007/s40430-021-02947-0