비행 조건 변화에 따른 사출 운동체의 초기 거동에 관한 수치적 연구 Numerical Study about Initial Behavior of an Ejecting Projectile for Varying Flight Conditions

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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.
Publisher
한국군사과학기술학회
Issue Date
2019-08
Language
Korean
Citation

한국군사과학기술학회지, v.22, no.4, pp.517 - 526

ISSN
1598-9127
URI
http://hdl.handle.net/10203/271574
Appears in Collection
AE-Journal Papers(저널논문)
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