Accession Number : AD0016379


Title :   INFLUENCE OF DENSITY AND INERT ADDITIVES ON THE WAVE SHAPE OF ' 'IDEAL' ' EXPLOSIVES


Descriptive Note : Technical rept. no. 17


Corporate Author : UTAH UNIV SALT LAKE CITY INST FOR THE STUDY OF RATE PROCESSES


Personal Author(s) : COOK, M A ; HORSLEY, G S


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/016379.pdf


Report Date : Jul 1953


Pagination or Media Count : 49


Abstract : Measurements of the ratio of the radius of wave curvature to the diameter (R/d) vs the density (rho) were made for the following ideal explosives for which the detonation velocity equals the hydrodynamic velocity (AD-14820): TNT, pentolite, and mixtures of TNT and pentolite with salt. At a 6-diam charge length, R/d varied almost linearly with rho. In TNT, a sharp discontinuity which occurred at rho = 1.35 was attributed to particle breakdown during the high- density pressings. In measurements of R/d vs charge length (L) for pure RDX and 40/60 RDX/NaCl, R/L remained constant at unity up to L/d=2.6. Between L/d=2.6 and 4.6, R reached a steady-state value and remained constant for higher L/d values in agreement with previous observations. R/d measurements were made for mixtures of TNT, RDX, and 50% pentolite with salt and for TNT and RDX with glass beads. For loosely packed TNT in 10-cm-diam charges, R/d decreased linearly with the amount of inert material from about 2.1 (pure TNT) to 1.3 (60% salt). In other cases, no definite variation in R/d with the amount of inert material could be established. However, with density corrections, a decrease in R/d with inert content was indicated for cast TNT and salt, TNT and glass beads, and RDX and salt. For mixtures of RDX and glass beads, and pentolite and salt, R/d appeared to reach a maximum and then decrease with an increasing inert content. The effects of segregation, deceleration of reaction rate, and attenuation of the wave toward the charge axis were believed to contribute to the doubt concerning the trends. (See also AD-16378)


Descriptors :   *DETONATION WAVES , *PENTOLITE , VELOCITY , STEADY STATE , DENSITY , MEASUREMENT , RATIOS , REACTION TIME , RATES , MIXTURES , PURITY , CURVATURE , ATTENUATION , DISCONTINUITIES , HYDRODYNAMICS , RDX , TNT , DETONATIONS , DECELERATION , CORRECTIONS , CASTINGS


Subject Categories : Ammunition and Explosives
      Explosions


Distribution Statement : APPROVED FOR PUBLIC RELEASE