Numerical modeling of shock-to-detonation transition in energetic materials

Ju Zhang, T. L. Jackson, J. D. Buckmaste, J. B. Freund

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Determining the hazard classification of energetic materials is important for transporta- tion safety and storage concerns. To avoid costly grain redesign and additional testing, a model that adequately predicts the shock sensitivity of energetic materials is required, particularly the outcome of the Naval Ordnance Laboratory Large Scale Gap Test. The goals of this effort are to develop and validate computational tools that predict the shock sensitivity of energetic materials. Specifically, to use our packing code, Rocpack, to gener- ate morphologies of interest for shock sensitivity assessments, and to use our CFD code, RocSDT, to propagate shocks of various strengths through the pack to predict the onset of detonation. Dealing accurately with the material interfaces in this problem is a long-standing chal- lenge, as familiar strategies lead to spurious temperature spikes, and therefore spurious reaction rate spikes. We describe a new strategy, which does not generate spurious spikes, and demonstrate via a number of test problems that numerical convergence can be achieved. We also examine two problems that are stepping stones to a complete simulation; both are planar. In the first, we consider the passage of a shock wave through pure HMX in which a line of hot spots of the kind generated by void collapse are located a short distance behind the shock. When the hot spot spacing is large, the shock remains a shock; when small, transition to detonation occurs. In the second problem we also insert hot spots, but into a matrix of HMX particles and binder.

Original languageEnglish (US)
Title of host publication47th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit 2011
PublisherAmerican Institute of Aeronautics and Astronautics Inc.
ISBN (Print)9781600869495
DOIs
StatePublished - 2011
Event47th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit 2011 - San Diego, CA, United States
Duration: Jul 31 2011Aug 3 2011

Publication series

Name47th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit 2011

Conference

Conference47th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit 2011
Country/TerritoryUnited States
CitySan Diego, CA
Period7/31/118/3/11

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Aerospace Engineering
  • Control and Systems Engineering
  • Electrical and Electronic Engineering
  • Mechanical Engineering

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