Theoretical modeling of converging and diverging detonation waves in solid and gaseous explosives. CONF-830704--7
The ignition and growth reactive flow model of shock initiation and detonation is shown to accurately calculate detonation velocity-radius data on spherically diverging and converging detonation waves in the solid explosive PBX-9404. Comparison of calculations with the ignition and growth Zeldovich-von Neumann-Doring (ZND)-type model and with a simple Chapman-Jouguet (CJ) model for converging detonation waves in the solid explosive LX-17 shows that the additional momentum associated with a finite thickness reaction zone in the ZND model causes a slightly more rapid acceleration of the detonation wave front. The theory of converging detonation waves is briefly reviewed. The effects of the final reaction product state, the variability of the heat of reaction, and the equations of state are discussed for converging detonation waves in gaseous and solid explosives. It is postulated that the reaction product states follow a locus of Chapman-Jouguet (CJ) states as the detonation velocity and pressure increase. In converging gaseous detonations the heat of reaction decreases and the adiabatic exponent increases as the detonation velocity increases. In converging detonations in solid explosives equation of state uncertainties dominate the calculations, and more experimental data on overdriven detonation waves are required for improved modeling.
- Research Organization:
- Lawrence Livermore National Lab., CA (USA)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 5857348
- Report Number(s):
- UCRL-88699; ON: DE83017300
- Country of Publication:
- United States
- Language:
- English
Similar Records
On the Existence of Pathological Detonation Waves
Characterization of initiation and detonation by Lagrange gage techniques. Final report