Accession Number : AD0001060


Title :   AIRBLAST PEAK PRESSURES ALONG THE WATER SURFACE FROM SHALLOW UNDERWATER EXPLOSIONS


Descriptive Note : Interim rept. no. 7


Corporate Author : NAVAL ORDNANCE LAB WHITE OAK MD


Personal Author(s) : NIFFENEGGER, C R


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/001060.pdf


Report Date : 01 Aug 1952


Pagination or Media Count : 39


Abstract : The decrease of air-blast peak pressure with distance along the water surface was studied for shallow underwater explosions. Peak pressures were obtained from shock-front velocity measurements by using the Rankine-Hugoniot equation. The shock-front velocity and sound velocity were determined from measurements taken directly from the film record. The slopes of the pressure- distance curves for the region observed (45 to 200 charge radii) were lower than those from a charge in the air. The crossover observed for some of the shallow shots was believed to be real. No indication was obtained that the proximity of the river bottom affected the magnitude of the peak pressure along the water surface. Curves for the peak pressure as a function of reduced charge depth showed that the pressures along the water surface scaled with the cube root of the charge weight between 20 and 4200 lbs.


Descriptors :   *WATER , PEAK VALUES , EXPLOSIVE CHARGES , AIRBURST , DEPTH , REDUCTION , SURFACES , PRESSURE , RIVERS , UNDERWATER EXPLOSIONS , ACOUSTIC VELOCITY , BOTTOM , SHALLOW DEPTH


Subject Categories : Inorganic Chemistry


Distribution Statement : APPROVED FOR PUBLIC RELEASE