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Research Papers: Design and Analysis

A Novel Scheme for Computing Gun Barrel Temperature History and Its Experimental Validation

[+] Author and Article Information
Avanish Mishra

Department of Mechanical Engineering and Mining Machinery Engineering, Indian School of Mines, Dhanbad, Jharkhand, 826004, Indiaavanish.ism@gmail.com

Amer Hameed

Weapon Systems and Engineering Dynamics Group, DA-CMT, Cranfield University, Shrivenham, Swindon, Wilts SN6 8LA, UKahameed.cu@defenceacademy.mod.uk

Bryan Lawton

Weapon Systems and Engineering Dynamics Group, DA-CMT, Cranfield University, Shrivenham, Swindon, Wilts SN6 8LA, UK

J. Pressure Vessel Technol 132(6), 061202 (Oct 13, 2010) (6 pages) doi:10.1115/1.4001740 History: Received January 16, 2009; Revised April 24, 2010; Published October 13, 2010; Online October 13, 2010

An accurate modeling of gun barrel temperature variation over time is important to assess wear and the number of shot fires needed to reach cook-off. Using lumped parameter methods, an internal ballistics code was developed to compute heat transfer to the gun barrel for given ammunition parameters. Subsequently the finite element method was employed to model gun barrel temperature history (temperature variation over time). Simulations were performed for a burst of nine shots and the results were found to match satisfactorily to the corresponding experimental measurements. Wear or erosion of the barrel during a gun fire is very sensitive toward the maximum bore surface temperature. The proposed scheme can accurately simulate gun barrel temperature history; hence improved wear calculations can be made with it. An important and unique advantage of the developed scheme is that it easily couples internal ballistics simulations with the finite element methods.

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Copyright © 2010 by American Society of Mechanical Engineers
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Figures

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Figure 1

Schematic of heat transfer to gun barrel

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Figure 2

Description of effective breech face

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Figure 3

(a) Experimentally measured variation of temperature for the first cycle. (b) Simulated temperature history of the first cycle.

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Figure 4

Gun barrel cross section and meshed model

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Figure 5

FEA result of bore surface temperature variation for the first cycle

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Figure 6

Comparison of GUNTEMP8.EXE and FEA result of bore surface temperature variation for the first cycle

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Figure 7

Simulated temperature history of 9 cycles

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Figure 8

Experimental and FEA results of 9 cycles

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