Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
Transient Heat Transfer Analysis of a Machine Gun Barrel
Submission Author:
Tales Chaves Bezerra Rocha , CE , Brazil
Co-Authors:
Tales Chaves Bezerra Rocha, Rodrigo Otávio de Castro Guedes
Presenter: Tales Chaves Bezerra Rocha
doi://10.26678/ABCM.COBEM2021.COB2021-0859
Abstract
The heat from propellants contributes to increased gun barrel temperature during a firing sequence. High values of barrel temperature could cause gun malfunctioning thus jeopardizing the user's safety in addition to accelerated barrel erosion. Therefore, it is desirable to determine the temperature distribution in rapid firing guns barrels. In this contribution, a numerical solution for the one-dimensional transient heat transfer problem across a M60 machine gun barrel is presented and discussed. The model considers the thermal conductivity and the specific heat of the barrel material as functions of the barrel temperature, and the interior wall boundary condition is computed from the interior ballistics of the cartridge via the Baer-Frankle method employed by PRODAS software tool. The numerical solution is then achieved through a finite-difference-method code implemented in the MATLAB software program. Results obtained in several burst firing situations such as rate of fire, number of rounds per burst and time between bursts were then critically analyzed in order to verify the maximum number of rounds allowed before the cook off temperature is attained in each situation. The results were also compared to the ones obtained with a simpler model that considers constant thermal conductivity and constant specific heat. The methodology here advanced could be employed in future studies concerning gun safety and barrel erosion as well as in trade studies of gun barrels materials.
Keywords
M60, Transient Heat Transfer, PRODAS, MATLAB
