Shock Development and Transition to Detonation Initiated by Burning in Porous Propellant Beds
Abstract
This report summarizes the analyses of deflagration to detonation transition (DDT) occurring in a packed bed of granular, high energy solid propellant. A reactive two-phase flow model of this phenomena is solved by utilizing a Lax-Wendroff finite differencing technique. A brief overview of the well-known shock jump conditions for one-dimensional, one-phase flow with heat addition is reported, and a similar analysis for one-dimensional, two-phase reactive flow is discussed. Improvements made in the gas phase nonideal equation of state, gas permeability, and numerical integration techniques allow for the prediction of a transition to a steady detonation from initiation by deflagration. Analyses are presented that clearly indicate the effect of the propellant physical and chemical parameters on the predicted run-up length to detonation. Predictions of this run-up length to detonation are presented as a function of propellant chemical energy, burning rate, bed porosity, and granulation (size). Limited comparison with actual DDT data in the literature indicates good qualitative agreement with these predictions.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1981
- Accession Number
- ADA102030
Entities
People
- Herman Krier
- P. Barry Butler
Organizations
- University of Illinois Urbana–Champaign