Airblast Effects Research: Small-Scale Experiments and Calculations
Abstract
A series of 1:15 scale model experiments were conducted to investigate the effects of loading density on the dynamic airblast flow parameters produced by spherical charge detonations in an underground ammunition storage magazine (shotgun design). Chamber loading densities ranged from 0.4 to 5.0 kg/cubic meter (TNT Equivalent). Total pressure measurements were made on the center line of the model access tunnel using a miniaturized, probe type, pressure mount. Side-on and total pressure measurements provide the data required to quantify the pressure regime at these locations within the model. The data also provide an estimate of the dynamic flow regime. Calculations for a full scale magazine were performed using the CTH hydrocode. Comparisons of the CTH calculated full scale pressure waveforms with the scaled-up recorded waveforms are excellent. Detonations in an underground magazine are confined so that the blast wave follows a restricted flow path to the portal. Comparisons of the measured and calculated pressures show that this confinement drastically increases the pressures of the blast wave by an order of magnitude or more above that produced in the free field by the same explosion source.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1999
- Accession Number
- ADA367244
Entities
People
- Charles E. Joachim
- Christo V. Lunderman
- Gordon W. Mcmahon
- Sharon B. Garner