Numerical analysis of the temperature field at the gun tail of light recoilless weapons during continuous firing

DOI:	10.11809/bqzbgcxb2023.08.014
Keywords:	recoilless gun; gun tail; temperature field; numerical simulation
Abstract:	During the continuous firing process of a recoilless gun, the temperature of the gun tail will continue to rise, and the gun tail is the most accessible position for gunners. In order to solve the problem of gunner’s safety protection, this paper establishes a finite element model of a recoilless gun tail by using the Ansys Workbench software to simulate the forced convection between the gunpowder gas and the inner wall of the gun tail during firing, and the natural convection between the outer wall and the environment. It also considers the natural convection between the outer air inflow and the inner wall of the gun tail after the end of the interior ballistic period. The convective heat transfer coefficient of the inner wall of the gun tail is determined by establishing the temperature equation of the propellant gas at the gun tail, and the temperature distribution law of the gun tail during rapid firing of the recoilless gun is numerically simulated. The results show that the temperature of the outer wall of the gun tail rises gradually with the increase of the number of projectiles, and reaches 116 ℃ and 138 ℃ respectively when the gun continuously fires to 6 and 12 rounds. The numerical simulation temperature results are consistent with the experimental results. Therefore, it is concluded that the temperature rise of the gun tail in the rapid firing process of the recoilless gun may cause burns to the gunner, and proper protective jackets should be added.
Issue:	Vol. 44 No. 8 (2023)
Published:	2023-08-28
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