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Proceedings Paper

Acoustic response modeling of energetics systems in confined spaces
Author(s): David R. González; Ray Hixon; William W. Liou; Matthew Sanford
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Paper Abstract

In recent times, warfighting has been taking place not in far-removed areas but within urban environments. As a consequence, the modern warfighter must adapt. Currently, an effort is underway to develop shoulder-mounted rocket launcher rounds suitable with reduced acoustic signatures for use in such environments. Of prime importance is to ensure that these acoustic levels, generated by propellant burning, reflections from enclosures, etc., are at tolerable levels without requiring excessive hearing protection. Presented below is a proof-of-concept approach aimed at developing a computational tool to aid in the design process. Unsteady, perfectly-expanded-jet simulations at two different Mach numbers and one at an elevated temperature ratio were conducted using an existing computational aeroacoustics code. From the solutions, sound pressure levels and frequency spectra were then obtained. The results were compared to sound pressure levels collected from a live-fire test of the weapon. Lastly, an outline of work that is to continue and be completed in the near future will be presented.

Paper Details

Date Published: 10 May 2007
PDF: 12 pages
Proc. SPIE 6564, Modeling and Simulation for Military Operations II, 65640P (10 May 2007); doi: 10.1117/12.719256
Show Author Affiliations
David R. González, Naval Surface Warfare Ctr. (United States)
Ray Hixon, Univ. of Toledo (United States)
William W. Liou, Western Michigan Univ. (United States)
Matthew Sanford, Naval Surface Warfare Ctr. (United States)

Published in SPIE Proceedings Vol. 6564:
Modeling and Simulation for Military Operations II
Kevin Schum; Dawn A. Trevisani, Editor(s)

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