Simulation of the dynamic behavior of explosion gas bubbles in a compressible fluid medium
By:  James E. Chisum
Publisher: Naval Postgraduate School; Available from National Technical Information Service
Published: 1996
Place of publication: Monterey, Calif; Springfield, Va
Language: eng
Number of pages: 85
Description: 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.
Notes: Dissertation supervisor(s): Young S. Shin.

"December 1996."

Dissertation (Ph.D. in Mechanical Engineering) Naval Postgraduate School, December 1996.

Includes bibliographical references (p. 81-83).

Approved for public release; distribution unlimited.

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US Navy (USN) author.

dk/dk cc:9116 6/11/97.