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Volume 17, Issue 34 (12-2021)                   Marine Engineering 2021, 17(34): 25-35 | Back to browse issues page

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Mahdian A, Moonesun M, Heydari Kebriti S, Shahriari B. Design of Super-Cavitation Bullet for Underwater Handgun. Marine Engineering 2021; 17 (34) :25-35
URL: http://marine-eng.ir/article-1-889-en.html
Design of Super-Cavitation Bullet for Underwater Handgun
Asghar Mahdian * 1, Mohammad Moonesun2 , Saeed Heydari Kebriti1 , Behrooz Shahriari1
1- Faculty of Mechanics, Malek Ashtar University of Technology
2- Shahrood University of Technology
Abstract:   (2440 Views)
Ordinary projectiles in the water usually experience a sharp drop in speed and a have a very short range of several meters. Super cavitation causes the entire body of the projectile to be covered by a cavity of gas (relative vacume). For this result the amount of frictional resistance under super cavitation conditions decreases significantly. In fact, the analysis of super-cavitation projectile is strongly dependent on cavitator diameter and its shape, ratio of length to projectile diameter, projectile mass, projectile diameter, final projectile range, recoil energy of the weapon. In this paper, the mass of projectile assumed to be independent paremeter. On the other hand because of bubble requirements, for cavitator some diameters are assumed. For this reason, design variables reduses to three quantity: mas and final range of projectile and recoil energy of weapon. According to required maximum range and minimum cost with trade off   beatween recoil energy and range, final options are limited. In this article the effects of each of these parameters and how they are analyzed by analytical relationships and their validation are explained.
Keywords: Super-cavitation, Calibre selection, Cavity, Design and Test
Full-Text [PDF 923 kb]   (1034 Downloads)    
Type of Study: Research Paper | Subject: Submarine Hydrodynamic & Design
Received: 2021/01/28 | Accepted: 2021/08/23
References
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