Selected Aspects of Heat Transfer Study in a Gun Barrel of an Anti-Aircraft Cannon

Mateusz Zieliński, P. Koniorczyk, Z. Surma, M. Preiskorn, J. Sienkiewicz
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引用次数: 1

Abstract

The paper presents the results of computer simulations of the transient heat flow in the barrel wall of a 35 mm caliber cannon for a single shot and a sequence of seven shots for a selected 30HN2MFA barrel steel. It was assumed that the inner surface of the barrel does not have a protective layer of chromium or nitride. When calculating heat transfer in a barrel, constant and temperature variable values of thermal conductivity, specific heat and density (in the range from RT (Room Temperature) up to 1000) in the 30HN2MFA steel were assumed. The test results were compared for both cases. A barrel with a total length of 3150 mm was divided into 6 zones (i = 1,, 6) and in each of them, the heat flux density was calculated as a function of the time q _i (t) on the inner surface of the barrel. In each zone, the heat transfer coefficient, as a function of the time hi(t) and bore gas temperature as a function of the time Tg(t) to the cannon barrel for given ammunition parameters, was developed. A calculating time equaling 100 ms per single shot was assumed. The results of the calculations were obtained using FEM implemented in COMSOL Multiphysics ver. 5.6 software.
高炮炮身管内传热研究的若干方面
本文介绍了35毫米口径火炮枪管壁瞬态热流的计算机模拟结果,并对选定的30HN2MFA枪管钢进行了单次射击和连续七次射击。假定枪管的内表面没有铬或氮的保护层。在计算筒体传热时,假设30HN2MFA钢的导热系数、比热和密度(在RT(室温)到1000的范围内)的恒定和温度变数值。对两种情况的测试结果进行了比较。将总长度为3150mm的筒体划分为6个区域(i = 1,, 6),计算每个区域内筒体内表面热流密度随时间q _i (t)的函数。在给定的弹药参数下,计算了每个区域的传热系数与时间hi(t)和膛内气体温度与时间Tg(t)的关系。假设每次射击的计算时间为100毫秒。计算结果采用COMSOL Multiphysics软件实现。5.6软件。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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23
审稿时长
53 weeks
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