Heat Transfer Analysis in 35 mm Anti-Aircraft Gun Barrel

Abstract

It is essential by the development of shooting cycle during endurance tests that the gun barrel temperature does not exceed the value set by the manufacturer. Therefore a series of shooting should be carried out which comprises both the stages of shooting, and set intervals between shooting. The methods for calculating heat transfer, proposed in literature, are often too time-consuming, to be used for cycle of several hundred shots. The paper presents results of numerical simulations of heat transfer in the gun barrel of anti-aircraft cannon caliber 35 mm (total length 3150 mm). The gun barrel was divided into 6 zones with the assumed boundary conditions. The initial-boundary value problem, i.e. the Fourier equation of transient heat conduction with the initial and boundary conditions was solved numerically. The paper presents the results of calculations for a single shot and a sequence of seven shots followed by a pause. The calculations are performed relatively fast on PC, and the proposed mathematical model of heat transfer can be easily tuned to the experimental data.