Experimental and numerical analysis of thermo-chemical erosion in gun steel

Rezgui, Narimane; Mickovic, M Dejan; Zivkovicc, Z Sasa; Ivanović, I.

doi:10.2298/tsci180608194r

Cited by 9 publications

(7 citation statements)

References 9 publications

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“…Where S is the cross-section of chamber, 2 m ;  is the charge quantity of propellant, kg ; l  is the correlation coefficient of projectile travel; p is the pressure of gunpowder gas, Pa ; l is projectile travel, m ;  is fraction of propellant burned; 0 V is the volume of chamber, 3 m ; p  is propellant density, 3 kg/m . Based on the modification of the 37mm M39 gun, Rezgui [61] used the vented container in the device to ignite, and simulated the situation inside gun barrel. During the simulation process, the gas temperature was calculated according to the combustion products of propellant.…”

Section: Calculation Methods Of Propellant Gas Temperaturementioning

confidence: 99%

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A Review on Life Prediction Methods of Gun Barrel

Zhang

Wang

Pan

et al. 2023

J. Phys.: Conf. Ser.

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In large caliber gun system, the high speed, high temperature and high pressure gas produced by propellant combustion will cause serious erosion damage to the inner wall of barrel, which will lead to continuous decline of gun performance and termination of the maximum life of barrel. The theories and methods of gun barrel life prediction mainly involve thermodynamics, chemistry, material and machinery science and so on. This paper mainly introduces the main mechanism of gun erosion and the calculation model of gun erosion which involves the numerical solution in internal ballistic combustion process, the heat transfer and erosion calculation of gun barrel. In view of the accurate calculation of parameters such as the temperature of gunpowder gas can more accurately reflect the erosion of inner wall of gun barrel, this paper summarizes the calculation methods of the temperature, thermal physical property parameters and convective heat transfer coefficient of high temperature and high pressure gas in gun barrel. In order to determine the erosion wear quantity and study the effect of heat input on the erosion process of inner wall of gun, erosion experiments are usually required. At present, the common erosion experiments mainly include the measurement of erosion quantity with semi-closed explosive device and the change of surface characteristics of gun steel target with laser pulse heating. By analyzing the criterion of barrel life, the establishment method of barrel life prediction model is studied deeply, and the main barrel life prediction model is introduced, which is convenient to guide engineering application.

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Section: Calculation Methods Of Propellant Gas Temperaturementioning

confidence: 99%

“…For example, when Rezgui [61] simulated nozzle heat transfer, the formula for calculating convective heat transfer coefficient is as follows [67]…”

Section: Convective Heat Transfer Coefficient In Borementioning

confidence: 99%

A Review on Life Prediction Methods of Gun Barrel

Zhang

Wang

Pan

et al. 2023

J. Phys.: Conf. Ser.

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“…Considering the convective heat exchange and radiation heat exchange between the gunpowder gas and the inner wall of the barrel, the heat transfer of the barrel and the natural convection heat transfer between the outer wall of the barrel and the surrounding environment, a one-dimensional multiphase flow inner ballistic model and a critical flow in the post-effect period are established. The model is a simulation model of the thermal effect inside the barrel with thermal boundary conditions, and the radial heat input and temperature of the barrel during the gun firing process are obtained [18][19][20][21][22][23][24][25].…”

Section: Barrle Temperature Calculationmentioning

confidence: 99%

Simulation study on erosion of barrel under thermal-mechanical-chemical coupling environment

Wang

Yang

Liu

2023

J. Phys.: Conf. Ser.

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Artillery is known as the “God of War”. When the ballistic performance of the barrel is reduced to the allowable value specified by the index due to erosion and wear, the life of the barrel is terminated, and the artillery equipment completely loses its combat effectiveness. The erosion and wear of the barrel involves many factors such as temperature, mechanics, chemistry. In this paper, based on the theory of internal ballistics and heat conduction, the temperature gradient distribution law of the inner wall of the barrel during the firing process of large-caliber artillery is simulated and calculated. Combined with Fick’s second law and the theory of metal phase transition, The relationship between the [C] content in the thermochemically affected layer of the barrel and the number of firing, the relationship between the thickness of the thermally affected layer and the explosion temperature of the propellant and the temperature of the inner wall were quantitatively analyzed. On this basis, the anatomical analysis of different parts of the barrel after firing verified the accuracy of the erosion model, quantitatively revealed the barrel erosion mechanism, and clarified the direction for the life improvement of large-caliber artillery barrels.

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“…Naveed 12 proposed the detailed multi‐physics study which has been carried out by numerically simulating a solid fractured gun barrel for 20 thermo‐mechanical cycles. Narimane 13 analyzed various factors of thermo‐chemical erosion process in gun steel, and analyzed influence of different propellants, titanium‐dioxide/wax wear reducing liner and tungsten‐disulfide nanoparticles layer on nozzle erosion. Yu 14 propped a hybrid numerical method of the Laplace transformation and the finite difference was applied to solve the transient heat transfer problem of a gun barrel.…”

Section: Introductionmentioning

confidence: 99%

Numerical research on ablation and wear of the artillery barrel based on UMESHMOTION user‐defined subroutine

Jin

Zou

Huang³

et al. 2022

Engineering Reports

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During the firing process, the gun barrel bears the thermal and chemical erosion of high‐temperature gunpowder gas and the wear of the rotation band. The forced cone tended to the most severely worn part of the barrel, which directly affects the life of the barrel. Combined with the erosion test and wear test of gun steel materials, this research studied the forcing cone of a medium caliber naval gun barrel. With the commercial finite element software ABAQUS as the platform, we took advanced adaptive mesh method combined with secondary development technology. This method used in our study in order to better realize the numerical simulation of the radial erosion wear of the forced projectile cone in the continuous firing environment. At the same time, we compared the numerical simulation with the actual firing test data, and proposed a new calculation method of barrel life. In conclusion, the results of this study showed that this method can better calculate the radial erosion wear of the forced cone, and provide guidance for improving the life of the gun barrel in the future.

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Experimental and numerical analysis of thermo-chemical erosion in gun steel

Cited by 9 publications

References 9 publications

A Review on Life Prediction Methods of Gun Barrel

A Review on Life Prediction Methods of Gun Barrel

Simulation study on erosion of barrel under thermal-mechanical-chemical coupling environment

Numerical research on ablation and wear of the artillery barrel based on UMESHMOTION user‐defined subroutine

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