REFRACTION OF UNDERWATER EXPLOSION SHOCK WAVES: PRESSURE HISTORIES MEASURED AT CAUSTICS IN A FLOODED QUARRY
Abstract
High explosive charges were fired in a flooded quarry having a refractive sound velocity structure, in order to observe shock wave pressure histories at caustics, or focal surfaces. For such regions, present theoretical understanding and conventional acoustic ray-tracing techniques are inadequate. Peak pressure amplification factors up to 5.8 were measured; the smaller the charge, the more extreme the focusing. Energy flux density was also enhanced, but impulse per unit area was relatively unaffected.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 19, 1967
- Accession Number
- AD0653741
Entities
People
- Jean A. Goertner
- Robert M. Barash
Organizations
- Naval Ordnance Laboratory