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Underground Ammunition Storage. Blast Propagation in the Tunnel System. Report IV A. Connected Chamber Storage. Variable Chamber Volume and Variable Angle between Branch and Main Passageway
NORWEGIAN DEFENCE CONSTRUCTION SERVICE OSLO OFFICE OF TEST AND DEVELOPMENT
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Model tests have been performed to determine the blast wave propagation in the tunnel system of underground ammunition storage sites with connected storage chambers. A total of 18 different configurations were tested with variable chamber volumes 300 - 15200 cc, angles between the branch- and main passage-way 35 - 90 degrees, and ratios between the cross sections of the branch- and main passage-way 0,125 - 0,5. The models were in linear scales 140 to 1100 of typical full scale installations. By analyzing the data, it was possible to obtain relatively simple scaling relationships which contain all of the most important geometrical parameters. The model data are compared with one large scale test and fair agreement is found.
APPROVED FOR PUBLIC RELEASE