Accession Number : AD0708888

Title :   CONDUCTIVE HEAT-TRANSFER RESISTANCE OF COMPOUND BARREL INTERFACE.

Descriptive Note : Technical rept.,

Corporate Author : ARMY WEAPONS COMMAND ROCK ISLAND ILL RESEARCH AND ENGINEERING DIRECTORATE

Personal Author(s) : Thomsen,Darrel M.

Report Date : MAY 1970

Pagination or Media Count : 38

Abstract : This is a continuation of a heat-transfer study (Technical Report 69-121, 'Conductive Heat-Transfer Resistance of Compound Barrel Interface') to determine the effect of thermal multilayer interface resistance on gun barrel radial temperature distributions. Gun barrel specimens were constructed of interference fit, knurl fit, force fit, and of a special ZrO2 interface fabricated by a unique autoclaving technique. Steady-state heat-transfer experiments were then conducted to measure interface thermal resistance at various temperatures. Based on these measured interface resistances, calculations were conducted to determine radial barrel temperatures as a function of firing times. These calculations were obtained with the aid of a digital computer program in which an implicit difference-analog is utilized. Results of these experiments, as well as calculated radial barrel temperature distributions, are presented. Also, temperature data are given for a firing experiment in which a gun barrel with a ZrO2 interface was tested and the results indicated a significant reduction of the surface temperature. (Author)

Descriptors :   (*GUN BARRELS, THERMAL PROPERTIES), HEAT TRANSFER, INTERFACES, HEAT FLUX, MANUFACTURING, FLAME SPRAYING, EXPERIMENTAL DATA, COMPUTER PROGRAMS

Subject Categories : Guns
      Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE