INFLUENCE OF RELATIONS DEFINING PROPELLANT GASES—BARREL HEAT TRANSFER ON CRITICAL BURST LENGTH OF 35 mm ANTI-AIRCRAFT CANNON

Abstract

The paper presents a review of propellant gases – barrel heat transfer relations and their influence on results of interior ballistics simulations for an artillery system. During simulations the lumped-parameters model of interior ballistics was applied. The thermal processes were calculated using the distributed-parameters model and resulted in barrel temperature changes estimation. Taking into account the high fire rate of investigated system – i.e. anti-aircraft cannon – the influence of applied heat transfer definition on critical burst length was estimated. Various considered formulae provided wide interval of obtained critical burst length for investigated system.