| Numerical Study about Initial Behavior of an Ejecting Projectile for Varying Flight Conditions |
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Sung Min Jo, Oh Joon Kwon, Hyuck-Hoon Kwon, Dong Gi Kang |
1Department of Aerospace Engineering, KAIST
2PGM Export Development Team 2, LIG Nex1 |
| 비행 조건 변화에 따른 사출 운동체의 초기 거동에 관한 수치적 연구 |
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조성민, 권오준, 권혁훈, 강동기 |
1한국과학기술원 항공우주공학과
2LIG넥스원(주) 유도무기수출개발단 2팀 |
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| Abstract |
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In the present study, unsteady flows around a projectile ejected from an aircraft platform have been numerically investigated by using a three dimensional compressible RANS flow solver based on unstructured meshes. The relative motion between the platform and projectile was described by six degrees of freedom(6DOF) equations of motion with Euler angles and a chimera technique. Initial behavior of the projectile for varying conditions, such as roll and pitch-yaw command on the control surface of the projectile, flight Mach number, and platform pitch angle, was investigated. The ejection stability of the projectile was degraded as Mach number increases. In the transonic condition, the initial behavior of the projectile was found to be unstable as increase of platform pitch angle. By applying the command to control surfaces of the projectile, initial stability was highly enhanced. It was concluded that the proposed simulation data are useful for estimating the ejection behavior of a projectile in design phase. |
| Key Words:
Computational Fluid Dynamics, Ejecting Projectile, Initial Behavior, Unstructured Overset Mesh Technique, 6Degrees of Freedom |
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