Analysis of gas-eroding barrel characteristics based on fluid-solid interaction

ZHANG Wenhao; YU Yonggang

doi:10.11883/bzycj-2022-0390

Volume 43 Issue 3

Mar. 2023

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ZHANG Wenhao, YU Yonggang. Analysis of gas-eroding barrel characteristics based on fluid-solid interaction[J]. Explosion And Shock Waves, 2023, 43(3): 034201. doi: 10.11883/bzycj-2022-0390

Citation:

ZHANG Wenhao, YU Yonggang. Analysis of gas-eroding barrel characteristics based on fluid-solid interaction[J]. Explosion And Shock Waves, 2023, 43(3): 034201. doi: 10.11883/bzycj-2022-0390

ZHANG Wenhao, YU Yonggang. Analysis of gas-eroding barrel characteristics based on fluid-solid interaction[J]. Explosion And Shock Waves, 2023, 43(3): 034201. doi: 10.11883/bzycj-2022-0390

Citation:

ZHANG Wenhao, YU Yonggang. Analysis of gas-eroding barrel characteristics based on fluid-solid interaction[J]. Explosion And Shock Waves, 2023, 43(3): 034201. doi: 10.11883/bzycj-2022-0390

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Analysis of gas-eroding barrel characteristics based on fluid-solid interaction

doi: 10.11883/bzycj-2022-0390

ZHANG Wenhao,
YU Yonggang^,

School of Energy and Power Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China

Received Date: 2022-09-09
Rev Recd Date: 2023-02-20

Available Online: 2023-02-20

Publish Date: 2023-03-05

Abstract

Abstract

Gun barrel erosion is primarily caused by the intense heat and mass transfer between the propellant gas and the tube during firing. To investigate the erosion characteristics of a 155 mm barrel in a high-temperature, high-pressure, and high-velocity gas, an unsteady CFD fluid-solid interaction heat transfer model is developed with improved accuracy of temperature calculation. The eroding process is separated into two stages relevant to its temperature dependence. Thermochemical erosion occurs when the temperature is between the austenite phase-transition temperature and the melting point of cementite. When the temperature is above the melting point, melting becomes the dominant factor influencing erosion, so this is the melting erosion stage. Therefore, a piecewise model is developed. The numerical results of the calculation are as follows. The wall temperature rises rapidly and then falls gradually. In addition, the temperature decreases with the increase of axial distance in general. At the beginning of rifling, the wall temperature is the highest, and the erosion consists of melting and thermochemical erosion. In most of the rifling areas, only thermochemical erosion occurs. The amount of erosion is reduced continuously with the increase of axial distance. The most severe erosion happens near the beginning of rifling, where 5.06 μm (288 K) of erosion is found after one shot. The method is valid through the comparison with test results. Concurrently, the effect of different operating conditions on the erosion characteristics of the tube is investigated. The erosion distribution properties are found to be similar at different ambient temperatures and firing times. The erosion is the most severe near the beginning of rifling and decreases monotonically along the axis, although the peak value and range of erosion are different. Continuous firing and the increase of the external environment temperature will aggravate erosion. As a result, erosion has a strong positive correlation with initial wall temperature, and the temperature rise will accelerate the tube’s deterioration; therefore, rapid cooling of the barrel will effectively extend the service life of the artillery.
- fluid-solid interaction,
- erosion,
- inner surface temperature,
- unsteady heat transfer model,
- erosion model

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References(24)

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