Numerical Study of the Effect of Geometric Shape, Holes Distribution, and Drop Height of Projectile on Deepwater Velocity, Using Coupled

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Taghizadeh Valdi M.H.; Atrechian M.R.; Jafary Shalkoohy A.; CHAVOSHI E.

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Paper Information

Journal: FLUID MECHANICS AND AERODYNAMICS JOURNAL Year:2019 | Volume:8 | Issue:1 (23) Page(s): 25-42

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Title

Numerical Study of the Effect of Geometric Shape, Holes Distribution, and Drop Height of Projectile on Deepwater Velocity, Using Coupled

Author(s)

Taghizadeh Valdi M.H. | Atrechian M.R. | Jafary Shalkoohy A. | CHAVOSHI E. | Issue Writer Certificate

Keywords

Water EntryQ1

Geometric ShapeQ1

Holes DistributionQ1

Drop HeightQ1

Coupled Eulerian-Lagrangian MethodQ1

Abstract

In this paper, Water Entry problem of three-dimensional projectiles with various geometrical shapes and different Drop Heights and Holes Distribution was numerically simulated by coupled Eulerian-Lagrangian (CEL) method and the effect of mentioned parameters on deepwater velocity and pinch-off time and depth was investigated by the commercial software Abaqus 6. 14-2. The numerical results were verified by comparison and proper adaptation with available theoretical and experimental results, such as the movement trajectory of a spherical projectile in water depth, shape of formed air cavity, and pinch-off time and depth, which revealed the accuracy and capability of the numerical algorithm used. The results revealed that pinch-off depth is influenced by projectile geometrical shapes and significantly increases along with increased Drop Height from free water surface, while the pinch-off time is a very weak function of mentioned parameters. Also, the drag force of water has the highest and lowest effect on flat and pointy-nose projectiles, respectively. Hence, the cubical projectile with the highest velocity depreciation impact on the model bed with a velocity of 1. 57m/sec and pinch-off depth occurs at a depth of 63cm, while the conical projectile with the lowest velocity depreciation has an impact velocity of 3. 88m/sec and pinch-off depth occurs at a depth of 98cm.

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APA: Copy

Taghizadeh Valdi, M.H., Atrechian, M.R., Jafary Shalkoohy, A., & CHAVOSHI, E.. (2019). Numerical Study of the Effect of Geometric Shape, Holes Distribution, and Drop Height of Projectile on Deepwater Velocity, Using Coupled. FLUID MECHANICS AND AERODYNAMICS JOURNAL, 8(1 (23) ), 25-42. SID. https://sid.ir/paper/371442/en

Vancouver: Copy

Taghizadeh Valdi M.H., Atrechian M.R., Jafary Shalkoohy A., CHAVOSHI E.. Numerical Study of the Effect of Geometric Shape, Holes Distribution, and Drop Height of Projectile on Deepwater Velocity, Using Coupled. FLUID MECHANICS AND AERODYNAMICS JOURNAL[Internet]. 2019;8(1 (23) ):25-42. Available from: https://sid.ir/paper/371442/en

IEEE: Copy

M.H. Taghizadeh Valdi, M.R. Atrechian, A. Jafary Shalkoohy, and E. CHAVOSHI, “Numerical Study of the Effect of Geometric Shape, Holes Distribution, and Drop Height of Projectile on Deepwater Velocity, Using Coupled,” FLUID MECHANICS AND AERODYNAMICS JOURNAL, vol. 8, no. 1 (23) , pp. 25–42, 2019, [Online]. Available: https://sid.ir/paper/371442/en

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