@misc{Mateusz_ZIELIŃSKI_Selected_2023-06-30,
 author={Mateusz ZIELIŃSKI and Mateusz ZIELIŃSKI},
 copyright={Wojskowa Akademia Techniczna},
 copyright={Wojskowa Akademia Techniczna},
 address={Warszawa},
 address={Warszawa},
 howpublished={online},
 year={2023-06-30},
 year={2023-06-30},
 publisher={Wojskowa Akademia Techniczna},
 publisher={Wojskowa Akademia Techniczna},
 language={angielski},
 language={angielski},
 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 ��̇��(��) 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.},
 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 ��̇��(��) 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.},
 title={Selected Aspects of Heat Transfer Study in a Gun Barrel of an Anti-Aircraft Cannon},
 title={Selected Aspects of Heat Transfer Study in a Gun Barrel of an Anti-Aircraft Cannon},
 type={artykuł},
 type={artykuł},
 keywords={Obciążenia cieplne lufy, Obciążenia cieplne lufy},
}