Investigation of detonation chains. Part 5: Shockwave calibration of the systems PWL (Plane Wave Lens) - plexiglass and tetryl-plexiglass
Abstract
A method of determining the pressure distribution of a shock wave which is generated in an inert material by a detonating explosive, is described. A shadowgraph was made of the shock wave which travels through the inert medium. In the streak camera record thus obtained, a line indicates the distance covered by the shock wave in time. After measuring a number of points of this line, a function can be fitted to these points in such a way as to represent the best possible approximation of the original line in the streak record. Differentiation of this function yields the shock wave velocity as a function of the distance covered. The shock wave pressure can be computed from this. The above procedure was performed for the PWL (plane wave lens)-plexiglass and tetryl-plexiglass systems.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- November 1975
- Bibcode:
- 1975STIN...7721381S
- Keywords:
-
- Detonation Waves;
- Pressure Distribution;
- Shock Wave Profiles;
- Velocity Distribution;
- Calibrating;
- Curve Fitting;
- High Speed Cameras;
- Lenses;
- Numerical Analysis;
- Plane Waves;
- Polymethyl Methacrylate;
- Shadowgraph Photography;
- Tetryl;
- Time Functions;
- Fluid Mechanics and Heat Transfer