THERMAL SCIENCE

International Scientific Journal

Narimane Rezgui

,

Dejan M. Micković

,

Saša Živković

,

Ivana B. Ivanović

EXPERIMENTAL AND NUMERICAL ANALYSIS OF THERMO-CHEMICAL EROSION IN GUN STEEL

ABSTRACT
Various factors of thermo-chemical erosion process in gun steel were analysed. The factors are mainly related to the thermal load of gun barrel inside surface, characteristics of barrel surface and chemical interactions between propellant combustion products and barrel surface. The experimental simulation of conditions in gun barrel was carried out by vented vessel firings in the device based on modification of 37 mm M39 gun. The nozzle mass loss during firing was the measure of gun steel erosion. The main thermal factor of erosion is maximum nozzle inner surface temperature. This temperature was determined experimentally by micro thermocouples measurements at specified distance away from the inner surface and by numerical analysis of the inverse heat conduction problem. Modelling of two-phase flow of propellant combustion products and unburned propellant grains in the vented vessel and heat transfer to the nozzle were conducted using developed one-dimensional interior ballistic code and computational fluid dynamics simulation in FLUENT. Influence of different propellants, titanium-dioxide/wax wear reducing liner and tungsten-disulfide nanoparticles layer on nozzle erosion was analysed. Good agreement between experimental and computational results was achieved.
KEYWORDS
thermocouples, heat transfer, gun steel, interior ballistics, computational fluid dynamics, nanoparticles
PAPER SUBMITTED: 2018-06-08
PAPER REVISED: 2018-06-22
PAPER ACCEPTED: 2018-06-27
PUBLISHED ONLINE: 2018-09-30
DOI REFERENCE: https://doi.org/10.2298/TSCI180608194R
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2019, VOLUME 23, ISSUE Issue 2, PAGES [599 - 612]
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Experimental and numerical analysis of thermo-chemical erosion in gun steel

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence