Experimental study of supercavitating flows induced by oblique and vertical water entry of blunt bodies

Shi Hong-hui; Hu Qing-qing; Chen Bo; Jia Hui-xia

doi:10.11883/1001-1455(2015)05-0617-08

Volume 35 Issue 5

Nov. 2015

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Shi Hong-hui, Hu Qing-qing, Chen Bo, Jia Hui-xia. Experimental study of supercavitating flows induced by oblique and vertical water entry of blunt bodies[J]. Explosion And Shock Waves, 2015, 35(5): 617-624. doi: 10.11883/1001-1455(2015)05-0617-08

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Shi Hong-hui, Hu Qing-qing, Chen Bo, Jia Hui-xia. Experimental study of supercavitating flows induced by oblique and vertical water entry of blunt bodies[J]. Explosion And Shock Waves, 2015, 35(5): 617-624. doi: 10.11883/1001-1455(2015)05-0617-08

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Experimental study of supercavitating flows induced by oblique and vertical water entry of blunt bodies

doi: 10.11883/1001-1455(2015)05-0617-08

School of Mechanical Engineering and Automation, Zhejiang Sci-Tech University, Hangzhou 310018, Zhejiang, China

Received Date: 2014-03-19
Rev Recd Date: 2014-06-05
Publish Date: 2015-10-10

Abstract

Abstract

Small-angle oblique and vertical water entry experiments were carried out to observe the supercavitation generated by the blunt bodies with different initial velocities. The development features of the supercavitation in different cases were analyzed. Experimental results show that for small-angle oblique and vertical water entry, the the round-head and flat-head (disc cavitator) blunt bodies can form stable trajectories. When the initial water-entry velocity is lower, the closure mode of the cavity is deep closure. When the initial water-entry velocity is higher, the closure mode of the cavity is surface closure, and its speed decay rate is larger. For the supercavity generated by the small-angle oblique water entry of the blunt bodies, the front part of the supercavity contour is in agreement with the result by G.V. Logvinovich's semi-empirical formula. For the vertical water entry of the blunt bodies, the influences of the head shapes were discussed on the beginning points and morphologies of the supercavities.
- mechanics of explosion,
- supercavity morphology,
- oblique water entry,
- blunt body,
- velocity,
- free surface

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References(14)

References

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