Shock and blast attenuation by aqueous foam barriers: influences of barrier geometry |
| |
Authors: | GJ Ball RA East |
| |
Institution: | (1) Department of Aeronautics and Astronautics, University of Southampton, Hants SO17 1BJ, UK , GB |
| |
Abstract: | A Free-Lagrange CFD code is used to simulate the attenuation, by means of barriers of aqueous foam, of shocks and blast waves
emerging from the open end of a two-dimensional duct. A range of foam barrier configurations is explored, comprising foam
sheets that extend the effective duct length, and foam “caps” that completely obstruct the duct exit. Near-field off-axis
overpressure time-histories are presented for each configuration. Two attenuation mechanisms are identified, both of which
are influenced by the barrier geometry used: partial transmission at foam/air interfaces due to impedance mismatching, and
delay of blast waves within the foam. Attenuation by dissipation within the foam is not simulated.
Received 13 October 1997 / Accepted 31 August 1998 |
| |
Keywords: | :Blast wave attenuation Aqueous foam Free-Lagrange method |
本文献已被 SpringerLink 等数据库收录! |
|