THE MECHANISM OF THE TRANSITION FROM DEFLAGRATION TO DETONATION IN HIGH EXPLOSIVES
Abstract
Experimental results of the study of spontaneous transition from deflagration to detonation indicate that the approach to the problem can be in two stages; the first is the formation of a shock from pressure waves engendered by a confined deflagration, and the second the shock-initiation of detonation. A program for the analytical treatment of the first stage was written for the IBM 704. Two numerical codes have been tested, one based on the so-called q- method and one which avoids amplitude fluctuations inherent in the q-method and thus gives a more realistic representation of a shock wave. Representations of spontaneous shock formation obtained by the two numerical codes and by the analytical treatment are discussed and compared. The numerical methods yield the temperature as a function of time and location during growth of the shock and thus allow a study of simple chemical kinetic models. Introduction of chemical kinetics into the program gives a basis for elucidation of the second stage of the transition problem, namely shock-initiation of detonation.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 14, 1961
- Accession Number
- AD0256593
Entities
People
- Carl T. Zovko
Organizations
- Naval Ordnance Laboratory