Accession Number : ADA244193

Title :   Model to Describe Melt Rates by Heat Conduction.

Descriptive Note : Final rept. for period ending Apr 90,

Corporate Author : CHEMICAL RESEARCH DEVELOPMENT AND ENGINEERING CENTER ABERDEEN PROVING GROUND MD

Personal Author(s) : Grasso, Paul S.

Report Date : AUG 1991

Pagination or Media Count : 18

Abstract : This report presents a model developed to predict conductive heat transfer through thick solids where melting occurs. Sample calculations will illustrate the use of this model, and an estimating function for the range of applicability will be discussed. Predicting melt rates and thermal profiles in solids is of fundamental interest to the flame and incendiary program. Such analysis allows one to integrate the combustion characteristics of an incendiary with the target heat transfer parameters to predict weapon effectiveness against the target and to optimize the fill composition. This modeling process minimizes the experimental and chemical formulation effort that, in turn, reduces research and development costs. As an initial effort, a conductive heat transfer model that predicts solid internal temperatures and melt rates was developed. Model simplicity was of significant importance, because it provided a closed analytical solution that allowed for a functional description of the heat transfer process and a basis on which to expand this effort. Future model verification will also require analysis of the test system, which was designed to accommodate controlled test conditions rather than actual target challenges.

Descriptors :   ANALYTIC FUNCTIONS, COMBUSTION, CONDUCTION(HEAT TRANSFER), CONTROL, COSTS, FORMULATIONS(CHEMISTRY), HEAT TRANSFER, INCENDIARY AMMUNITION, INTERNAL, MELTS, MODELS, PROFILES, RATES, SOLIDS, SOLUTIONS(GENERAL), TARGETS, TEMPERATURE, TEST AND EVALUATION, THERMAL CONDUCTIVITY, THERMAL PROPERTIES, THICKNESS, VERIFICATION, WEAPON SYSTEM EFFECTIVENESS.

Subject Categories : Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE