Photogrammetry of the Particle Trajectories on Dipole West Shots 8, 9, 10, and 11. Volume II. Shot 9.
Abstract
This volume describes the analysis of particle trajectories in blast waves produced by simultaneous detonation of two spherical 1080-lb pentolite charges. One charge was positioned 15 ft above smooth ground and the second was 30 ft above the first. Photogrammetric measurements were made of the trajectories of air particle flow tracers (smoke puffs) which had been placed in a vertical grid ranging from 3 to 58 ft above the ground and at radial distances ranging from 25 to 85 ft from the vertical axis through the charges. From measured particle trajectories, calculations were made of the particle velocities, densities, hydrostatic overpressures, and dynamic pressures throughout the blast wave, at times ranging from 3 ms to 60 ms after detonation. The shock front times-of-arrival were also determined for the primary shock from each charge; for the Mach stems produced above and below the interaction plane midway between the two charges; and for the Mach stem produced at the ground surface. Calculations were made of shock velocities, peak particle velocities, air densities and hydrostatic overpressure immediately behind each shock. Results, presented both graphically and in tables, are compared to results for the same experiment using shock front photogrammetry and refractive image analysis.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1977
- Accession Number
- ADA053420
Entities
People
- D. J. Mcmillin
- D. Trill
- J. M. Dewey
Organizations
- General Electric