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On the water exit of supercavitating projectiles with different head shapes

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Abstract

In this paper, the water-exit phenomenon has been studied experimentally and numerically. Based on the volume-of-fluid model and the Schnerr–Sauer cavitation model, the water-exit supercavitation around different shapes of cavitator projectiles is investigated using a dynamic mesh technology and three-dimensional six-degree-of-freedom method. The numerical results are compared with the experimental results obtained in our laboratory. Next, the effects of the cavitator shape on the characteristics of the projectile motion, breaking of the free surface, supercavitation size, and hydrodynamics of the water-exit supercavitation are analyzed. It was found that the hemispherical-nose projectile holds the best storage capacity and the longest displacement. The blunt disk-shaped nose projectile generates the maximum diameter of supercavity. The cavitation diameters of the conical-nose projectile and the hemispherical-nose projectile are relatively small.

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Acknowledgements

This work was supported by the Zhejiang Provincial Natural Science Foundation of China (Grant No. LY16A020003).

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Authors and Affiliations

  1. College of Mechanical Engineering and Automation, Zhejiang Sci-Tech University, No. 928, Avenue 2, Xiasha Higher Education Zone, Hangzhou, 310018, Zhejiang Province, People’s Republic of China

    H. H. Shi, D. H. Zhou, L. W. Lu, D. Zhou & Y. Liu

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  1. H. H. Shi
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  2. D. H. Zhou
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  3. L. W. Lu
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  4. D. Zhou
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  5. Y. Liu
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Correspondence to Y. Liu.

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Communicated by C.Y. Wen.

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Shi, H.H., Zhou, D.H., Lu, L.W. et al. On the water exit of supercavitating projectiles with different head shapes. Shock Waves 31, 597–607 (2021). https://doi.org/10.1007/s00193-021-01025-7

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