Journal of the Korea Institute of Military Science and Technology (한국군사과학기술학회지)

The Korea Institute of Military Science and Technology (한국군사과학기술학회)
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The Effect of Surface Roughness on the Trajectory of Howitzer Shell

표면 거칠기가 곡사포탄의 탄도에 미치는 영향

  • Shin, Geonho (Mechanical Engineering(Department of Aeronautics, Mechanical and Electronic Convergence Engineering), Kumoh National Institute of Technology) ;
  • Cheon, Kangmin (Mechanical Engineering(Department of Aeronautics, Mechanical and Electronic Convergence Engineering), Kumoh National Institute of Technology) ;
  • Shin, Baekcheon (Mechanical Engineering(Department of Aeronautics, Mechanical and Electronic Convergence Engineering), Kumoh National Institute of Technology) ;
  • Go, Jeongil (Mechanical Engineering(Department of Aeronautics, Mechanical and Electronic Convergence Engineering), Kumoh National Institute of Technology) ;
  • Lee, Junhyeok (Mechanical System Engineering, Kumoh National Institute of Technology) ;
  • Hur, Jangwook (Mechanical Engineering(Department of Aeronautics, Mechanical and Electronic Convergence Engineering), Kumoh National Institute of Technology)
  • 신건호 (금오공과대학교 기계공학과(항공기계전자융합전공)) ;
  • 천강민 (금오공과대학교 기계공학과(항공기계전자융합전공)) ;
  • 신백천 (금오공과대학교 기계공학과(항공기계전자융합전공)) ;
  • 고정일 (금오공과대학교 기계공학과(항공기계전자융합전공)) ;
  • 이준혁 (금오공과대학교 기계시스템공학과) ;
  • 허장욱 (금오공과대학교 기계공학과(항공기계전자융합전공))
  • Received : 2022.02.03
  • Accepted : 2022.06.29
  • Published : 2022.08.05
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Abstract

Surface state change of ammunition generated during the storage period increases the surface roughness and this affects the flight of ammunition, but there are no research results quantitatively indicating this. In this study, the drag force for each Mach number of howitzer shells was calculated through CFD to which the surface data of the howitzer shell was applied, and analysis of trajectory was performed using drag force values as an input of the 4th Runge-Kutta method, and the degree of decrease of the maximum range caused by the surface roughness of the howitzer shell was estimated. As a result, it was confirmed that the maximum range of howitzer shell with high surface roughness was 1.12 % shorter than that of howitzer shell without roughness. It was confirmed that the effect of surface roughness on the trajectory is not negligible.

Keywords

Acknowledgement

본 연구는 과학기술정보통신부 및 정보통신기획평가원의 지역지능화혁신인재양성(Grand ICT연구센터) 사업의 연구결과로 수행되었음(IITP-2022-2020-0-01612).

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