ePrints@IIScePrints@IISc Home | About | Browse | Latest Additions | Advanced Search | Contact | Help

Impact dynamics of a supercavitating underwater projectile

Rand, R and Pratap, R and Ramani, D and Cipdla, J and Kirschne, I (1997) Impact dynamics of a supercavitating underwater projectile. In: ASME 1997 Design Engineering Technical Conferences, DETC 1997, 14-17 Sep 1997, Sacramento; United States.

Full text not available from this repository.
Official URL: https://doi.org/10.1115/DETC97/VIB-3929


We investigate the in-flight dynamics of a simplified model of a supercavitating body. In particular we are interested in the nature and frequency of the impacts which occur as the tail of the body touches the cavity walls. Referring to laboratory experiments conducted at Cal Tech in the 1950's, we show that the tip force by the fluid is approximately directed along the length of the body. This gives zero moment about the body's center of mass which leads us to assume that the body moves as if it were a moment-free rigid body pinned at its tip. To simplify the analysis, we assume that the body is not spinning about its symmetry axis. Then the motion between impacts is a plane motion with constant angular velocity. Using elementary fluid mechanics, we model the impact occurring when the tail touches the cavity walls, and we show that it is reasonable to assume that the impact is instantaneous with coefficient of restitution unity. Using this simplified model, we offer a simulation for typical parameters. © 1997 American Society of Mechanical Engineers (ASME). All rights reserved.

Item Type: Conference Paper
Publication: Proceedings of the ASME Design Engineering Technical Conference
Publisher: American Society of Mechanical Engineers (ASME)
Additional Information: The copyright of this article belongs to American Society of Mechanical Engineers (ASME)
Keywords: Flight dynamics; Fluid mechanics, Center of mass; Coefficient of restitution; Constant angular velocity; Impact dynamics; In-flight dynamics; Laboratory experiments; Supercavitating; Underwater projectile, Vibrations (mechanical)
Department/Centre: Division of Interdisciplinary Sciences > Centre for Nano Science and Engineering
Date Deposited: 22 Mar 2021 11:38
Last Modified: 22 Mar 2021 11:38
URI: http://eprints.iisc.ac.in/id/eprint/68496

Actions (login required)

View Item View Item