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Study on the Drag Determination for Analyzing Base Bleed Effects

항력감소분석을 위한 항력산출에 대한 연구

  • Kim, Hanjun (Propulsion Technology 1 Team, Daejeon Plant, Hanwha Corporation) ;
  • Shin, Kyung-Hoon (Propulsion Technology 1 Team, Daejeon Plant, Hanwha Corporation) ;
  • Han, Houkseop (Propulsion Technology 2 Team, Daejeon Plant, Hanwha Corporation)
  • Received : 2015.12.08
  • Accepted : 2016.12.26
  • Published : 2017.02.01

Abstract

In this paper, determination method for drag force and drag coefficient from results of firing test is described. The drag force and drag coefficient are determined through inverse operation of 2-dimensional projectile equation of motion. Determination method was verified by comparing analytical drag coefficient with data from flight test. Analysis of drag coefficient and drag reduction was performed with the data of flight test using artillery projectiles with base bleed unit.

본 논문은 비행시험의 결과를 이용하여 항력 및 항력감소 분석을 위한 항력계수 산출기법에 대하여 기술하였다. 2차원 탄도운동방정식의 역산을 통하여 비행시험을 이용한 항력계수 산출방법에 대하여 정리하였으며 155 mm 탄의 비행시험을 통하여 이론적인 항력계수와 시험결과로부터 산출된 항력계수를 비교하여 항력계수 산출 기법에 대한 검증을 수행하였다. 항력감소제가 적용된 탄의 비행시험결과를 이용하여 항력계수 산출 및 항력감소 양상을 분석하였다.

Keywords

References

  1. Nils-Erik, G., Kurt, A. and Rune, H., "Base-Bleed Systems for Gun Projectile," Gun Propulsion Technology, Vol. 109, Chapter 16, 1988.
  2. Robert, F.L., "Determination of Aerodynamic Drag and Exterior Ballistic Trajectory Simulation for The 155 mm, DPICM M864 Base-Burn Projectile," BRL-MR-3768, 1989.
  3. Robert, L.M., "A Computer Program for Estimating The Drag Coeffcients of Projectiles," ARBRL-TR-02293, 1981.