Numerical Investigations of Cavitation Nose Structure of a High-Speed Projectile Impact on Water-Entry Characteristics

Li, Qiang; Lu, Lin

doi:10.3390/jmse8040265

Cited by 17 publications

(2 citation statements)

References 29 publications

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“…In terms of cavitation, research mainly focused on underwater vehicles [20,21]. Recently, Li et al [22] established a numerical model of the water-entry projectile and analyzed in detail the effects of water-entry velocity, angle, and other factors on the cavitation characteristics of the projectile.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study on the Flow Field Characteristics and Efficiency of Different Underwater Gun Muzzle Brakes

Sun,

Li,

Han

et al. 2023

J. Phys.: Conf. Ser.

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The submerged gun’s mathematical and physical models were established, and an investigation was conducted on the development of the flow field and the recoiling efficiency of three representative muzzle brakes. The study employed the Schnerr-Sauer cavitation model and the k − ω transport turbulence model, both based on the Reynolds-averaged Navier-Stokes method. Numerical simulation of the underwater firing of a 12.7 mm gun’s muzzle flow field was accomplished using a combination of user-defined function (UDF) and overlapping mesh techniques. Detailed analysis was performed on the flow field characteristics encompassing density, velocity, and phase state fields, along with an in-depth examination of the efficiency of the three muzzle brakes. The simulation results demonstrated an enhanced cavitation effect when a brake was incorporated, with the impact muzzle brake exhibiting the highest efficiency, followed by the impact-reaction type, while the reaction type exhibited the lowest performance.

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Section: Introductionmentioning

confidence: 99%

Numerical Study on the Flow Field Characteristics and Efficiency of Different Underwater Gun Muzzle Brakes

Sun,

Li,

Han

et al. 2023

J. Phys.: Conf. Ser.

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“…Li et al [10] explored the impact of surface wettability on splash and cavity evolution, as well as the hydrodynamic characteristics for low Froude numbers. Li et al [11] and Liu et al [12] used numerical simulations to study the influence of entry angles, rotation speeds, and initial speeds on cavity evolution and trajectory stability of projectiles. Yun et al [13] conducted experimental studies on the motion characteristics of oblique and vertical water-entry of two parallel spheres by using high-speed photography, obtaining the formation and evolution of the cavity.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation into the Tail-Slapping Motion of a Projectile with an Oblique Water-Entry Speed

Lu,

Gao,

et al. 2023

JMSE

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In this study, the tail-slapping behavior of an oblique water-entry projectile is investigated through high-speed photography technology. The experimental images and data are captured, extracted and processed using a digital image processing method. The experimental repeatability is verified. By examining the formation, development and collapse process of the projectile’s cavity, this study investigates the impact of the tail-slapping motion on the cavity’s evolution. Furthermore, it examines the distinctive characteristics of both the tail-slapping cavity and the original cavity at varying initial water-entry speeds. By analyzing the formation, development and collapse process of the cavity of the projectile, the influence of the tail-slapping motion on the cavity evolution is explored. Furthermore, it examines the evolution characteristics of both the tail-slapping cavity and the original cavity under different initial water-entry speeds. The results indicate that a tail-slapping cavity is formed during the reciprocating motion of the projectile. The tail-slapping cavity fits closely with the original cavity and is finally pulled off from the surface of the original cavity to collapse. In addition, as the initial water-entry speed increases, both the maximum cross-section size of the tail-slapping cavity and the length of the original cavity gradually increase. With the increase in the number of tail-slapping motions, the speed attenuation amplitude of the projectile increases during each tail-slapping motion, the time interval between two tail-slapping motions is gradually shortened, the energy loss of the projectile correspondingly enlarges, and the speed storage capacity of the projectile decreases.

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Asymmetric flow action on hydrodynamics and structural dynamics for high-speed oblique water entry of the semi-sealed cylindrical shell

Xia

Wei

Cao

2023

Applied Ocean Research

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Numerical Investigations of Cavitation Nose Structure of a High-Speed Projectile Impact on Water-Entry Characteristics

Cited by 17 publications

References 29 publications

Numerical Study on the Flow Field Characteristics and Efficiency of Different Underwater Gun Muzzle Brakes

Numerical Study on the Flow Field Characteristics and Efficiency of Different Underwater Gun Muzzle Brakes

Experimental Investigation into the Tail-Slapping Motion of a Projectile with an Oblique Water-Entry Speed

Asymmetric flow action on hydrodynamics and structural dynamics for high-speed oblique water entry of the semi-sealed cylindrical shell

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