Comparison of HOB Curves for 0.5-g NP Charges with Field Test Data and Calculations
Abstract
Experiments are described on the reflection of spherical blast waves from planar surfaces. The blast waves were created by the detonation of 0.5-g spherical charges of NITROPENTA (NP). The scale of the experiments was about 1/1000 per kiloton. Diagnostics included schlieren photography and a high-speed pressure measurement system. A parametric series of height-of-burst (HOB) experiments were conducted over hydrodynamically smooth, rough and porous surfaces. Peak pressure measurements were used to construct isobaric HOB curves. The NP curves agree with the HOB curves derived from field tests that utilized much larger HE charges (1 to 500 kg). Nevertheless, comparison with high-fidelity pressure measurements from point-explosion tests and recent hydrocode simulations of the same tests has demonstrated that peak pressures on the NP experiments are about 20 percent too low in the low-pressure transition region - - due to gauge-size limitations. The wave-forms become extremely peaked in this transition region, and gauges with better frequency response are needed to accurately measure the peak pressures.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1992
- Accession Number
- ADA253377
Entities
People
- Allen Kuhl
- Gunther Scheklinski-gluck
- Heinz Reichenbach