Studies in the transition from deflagration to detonation in granular explosives—II. Transitional characteristics and mechanisms observed in 91/9 RDX/Wax
✍ Scribed by Richard R. Bernecker; Donna Price
- Publisher
- Elsevier Science
- Year
- 1974
- Tongue
- English
- Weight
- 1004 KB
- Volume
- 22
- Category
- Article
- ISSN
- 0010-2180
No coin nor oath required. For personal study only.
✦ Synopsis
The apparatas and instrumentation de~'ribed in the previous paper have been used to observe the transitional behavior of burning to detonation for a 91/9 RDX/wax mixture. ';'ransitlons to detonation wt-re ob~ers,xl ft~r all densities beta ten 67 and 95~ TMD. The ~quencc ~f eb~tved events following ignition of the explosive charge was: stable propag:ttion of a c,nvect~ve fl~m~e front, cornpaetion of the more porous burning charges, ft, trnalion of a postconvective (con~prcs,;ive) wave m the ignition region, subsequent coalescence of compressive waves some distance be~, ,~nd the igniti,m region, and the formation era detonation wave l to 2 cm beyond tht intersectien of *,he conve,:livc and postcenvective fronts. It is proposed that the shock to detonation sequence starts in the region of coalescence ofcon,j~,,~ave waves. The velocity of the convective flame front ~as observed I~ increase with inc'reasb g, charge density in agreement with earher results from ammonium picrate. The predetonation column length as a fnnction of charge compaction exhibited a minimum; s,.~h minima have been reported by other workers for PETN. RDX, and HMX.