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Simulation of the dynamic behavior of explosion gas bubbles in a compressible fluid medium

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Author
Chisum, James E.
Date
1996-12
Advisor
Shin, Young S.
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Abstract
Data from one-dimensional (spherically symmetric) analyses was used to examine the effects of compressibility and gas energy on the dynamic behavior of an explosion gas bubble, by comparing the bubble's behavior with experimental results and with analytical results which neglect these factors. Results from two-dimensional (axially symmetric) analyses were used to investigate the behavior of a deep explosion gas bubble in the vicinity of plane rigid or constant pressure boundaries. Previous analytical research into explosion gas bubbles near such boundaries has primarily led to results of a qualitative nature, owing to a complete breakdown of the assumptions made in the analysis at the critical juncture. In the present investigation, it was found possible to characterize the effect of the boundary surface on both the change in the first oscillation period of the bubble and its location at the end of the first oscillation cycle. For a broad range of bubble-boundary standoff distances, these semi-empirical characterizations have a functional form particularly suitable for extension of the quantitative results of this investigation to other explosive charge types, weights, and depths, as has been done for the Willis formula for the free-field oscillation period of explosion gas bubbles.
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This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
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http://hdl.handle.net/10945/8964
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  • 1. Thesis and Dissertation Collection, all items

Related items

Showing items related by title, author, creator and subject.

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    Explosion Gas Bubbles Near Simple Boundaries 

    Chisum, James E.; Shin, Young S. (John Wiley & Sons, Inc., 1997);
    Finite element analyses of explosion gas bubbles show that including the compressibility of the surrounding media leads to appreciable differences in key areas of the bubble's behavior. In order to more fully understand ...
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    Boundary curvature effects on gas bubble oscillations in underwater explosion 

    Matsumoto, Kazuhiro (Monterey, California. Naval Postgraduate School, 1996-03);
    The oscillation of a gas bubble produced as a result of underwater explosion could cause the severe whipping damage on nearby marine vehicle. The effects of rigid boundary curvatures to explosive gas bubble oscillation ...
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    High speed photographic investigation of the first bubble period created by an underwater explosion. 

    Hardesty, John F. (Monterey, California: U.S. Naval Postgraduate School, 1960);
    A relatively safe and inexpensive method was developed for the investigation of the oscillating bubble caused by the hot gases from an underwater explosion. High speed photography was employed to record the pulsations ...
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