Supercavitating flow around high-speed underwater projectile near free surface induced by air entrainment

Xu, Chang; Huang, Jian; Wang, Yiwei; Wu, Xiaocui; Huang, Chenguang; Wu, Xianqian

doi:10.1063/1.5017182

Cited by 24 publications

(5 citation statements)

References 41 publications

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“…In particular, numerical works that used experimental data to validate the results were found [24][25][26][27][28][29][30]. Additionally, works related to partial ventilation cavitation [31][32][33][34][35][36][37][38][39] and supercavitation [40][41][42][43][44][45][46][47] appeared. Finally, there were some other non-related works [48][49][50][51][52][53][54][55][56].…”

Section: Searchmentioning

confidence: 99%

Micro/Bubble Drag Reduction Focused on New Applications

García-Magariño

Lopez-Gavilan

Sor

et al. 2023

JMSE

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Bubble drag reduction has been shown to be a promising technique for reducing the drag in ships, thus reducing the emission of pollutants and allowing the compliance with the new requirements imposed recently in this respect. Different searches have been conducted in the publications related to this technique, and an increase in interest has been shown, especially in the last decade. In this context, a review of the experimental work related to bubble drag reduction published in the last decade is presented in the present article. The works were classified according to the facility used (towing tank, cavitation tunnel, water channel, Taylor–Couette…), and the main finding are presented. It was found that two new trends in research have arisen, while there are still contradictions in the fundamental basis, which needs further study.

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Section: Searchmentioning

confidence: 99%

Micro/Bubble Drag Reduction Focused on New Applications

García-Magariño

Lopez-Gavilan

Sor

et al. 2023

JMSE

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“…Previous literature on vaporous cavities or ventilated cavities near the free surface indicates that the dynamic behavior of these cavities is affected by the presence of the free surface [30][31][32][33]. Liu et al [34] studied the ventilated supercavity generated by a cavitator after horizontal movement close to the free surface.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation on the Ventilated Supercavity around a Body under Free Surface Effect

Zhi

Jin

Huang

et al. 2023

JMSE

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Reducing vessel resistance by using ventilated cavities has been a highly researched topic in the marine industry. There is limited literature on ventilated supercavities near the free surface, which indicates that their dynamic behavior is more complex than conventional ventilated cavities due to the effect of the free surface. This paper employs numerical simulations to study the dynamic behavior of the ventilated supercavity, taking into account the effect of the free surface. Numerical simulations can predict gas leakage behaviors, cavity geometry, and internal flow structures. The influence of the free surface shortens the length of the ventilated cavity and increases the diameter. The presence of the free surface mainly changes the vertical velocity distribution between the free surface and the cavity. The results show that there are two typical gas leakage mechanisms under different immersion depths: twin-vortex tube leakage mode and re-entrant jet leakage mode. The internal flow field of ventilated supercavity is classified into three regions: the internal boundary layer, the ventilation influence region, and the reverse flow region. As the distance between the free surface and the ventilated supercavity decreases, the ventilated supercavity is affected by both the free surface effect and the gravity effect.

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“…The study shows that the supercavity evolves across different cavity regimes with distinct patterns. 7,8 studied the influence of free liquid on the cavity shape of the moving body and the flow field in the cavity through experiments and numerical methods. 9,10 used numerical methods to study the characteristics of supercavitation flow under complex environmental interference.…”

Section: Introductionmentioning

confidence: 99%

Numerical research of lateral flow influence on supercavitating flow

2022

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In this paper, a recompiled multiphase flow solver, which introduced the lateral flow source into the code, is developed to investigate the effect of the lateral flow on the supercavitation phenomenon. The evolution of the supercavity profile and the resistance of the vehicle under different lateral flow speeds are studied. The results show that the recompiled solver can calculate the effect of the lateral flow on the supercavitation, and the influence of lateral flow on the supercavity is related to the speed of the counter flow. Under the same lateral flow velocity, the higher the convection velocity, the weaker the influence of lateral flow on the cavity profile and resistance. When the lateral flow velocity is less than 8% of the convection velocity, the effect of the lateral flow on the supercavity size and the resistance of the vehicle can be ignored. As the lateral flow strengthens, the supercavity will deform and even break and the resistance of the vehicle increases significantly. After removing the source of the lateral flow, the cavity re-grows again and forms a huge supercavity, which is much larger than the original one before introducing the velocity source. Then, the cavity gradually shrinks and reaches a new steady state.

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Supercavitating flow around high-speed underwater projectile near free surface induced by air entrainment

Cited by 24 publications

References 41 publications

Micro/Bubble Drag Reduction Focused on New Applications

Micro/Bubble Drag Reduction Focused on New Applications

Numerical Investigation on the Ventilated Supercavity around a Body under Free Surface Effect

Numerical research of lateral flow influence on supercavitating flow

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