Effects of gravity and compressibility on supercavitating flowcaused by high speed projectile

Meng Qingchang; Zhang Zhihong; Li Qijie

doi:10.11883/1001-1455(2016)06-0781-08

Volume 36 Issue 6

Oct. 2018

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Meng Qingchang, Zhang Zhihong, Li Qijie. Effects of gravity and compressibility on supercavitating flowcaused by high speed projectile[J]. Explosion And Shock Waves, 2016, 36(6): 781-788. doi: 10.11883/1001-1455(2016)06-0781-08

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Meng Qingchang, Zhang Zhihong, Li Qijie. Effects of gravity and compressibility on supercavitating flowcaused by high speed projectile[J]. Explosion And Shock Waves, 2016, 36(6): 781-788. doi: 10.11883/1001-1455(2016)06-0781-08

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Effects of gravity and compressibility on supercavitating flowcaused by high speed projectile

doi: 10.11883/1001-1455(2016)06-0781-08

College of Science, Naval University of Engineering, Wuhan 430033, Hubei, China

Received Date: 2015-04-27
Rev Recd Date: 2015-06-15
Publish Date: 2016-11-25

Abstract

Abstract

The supercavitating projectile is a new underwater weapon with high speed and kinetic energy. Based on the theory of the ideal compressible potential flow, and taking into account of the gravity effect, an unified theoretical model and numerical calculation for the supercavitating flow caused by an underwater slender conical projectile were constructed, the integral-differential equations for computing the supercavity profiles at subsonic and supersonic speed were derived, and the numerical discrete scheme and a recursive solution were proposed using local fitting of quadratic polynomial, thus obtaining the supercavity profile. The theoretical model and numerical calculation were verified by comparing the asymptotic solutions with the numerical ones of the supercavity aspect ratio. The effects of gravity and compressibility on the supercavity scale, pressure distribution over the projectile and base drag coefficient were summarized through analysis of the supercavity profiles and hydrodynamic coefficients in different movement modes, depths and speeds for the slender conical projectile.
- fluid mechanics,
- compressibility,
- potential flow theory,
- supercavity,
- projectile,
- subsonic,
- supersonic,
- gravity

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References(17)

References

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