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- 저자 : WESSAM Mahfouz Elnaggar (검색결과 1 건)
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Numerical investigation of the three-dimensional dynamic process of sabot discard
HUANG Zhen-gui,WESSAM Mahfouz Elnaggar,CHEN Zhi-hua 대한기계학회 2014 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.28 No.7
The sabot discard process of an armor-piercing, fin-stabilized discarding sabot (APFSDS) is crucial for the flight stability of the projectile. In this paper, the sabot discard behavior after projectile ejection from the muzzle is investigated at Mach number 4.0 and angle ofattack of 0°. 3D compressible equations implemented with a dynamic unstructured tetrahedral mesh are numerically solved with a commercialcomputational fluid dynamics (CFD) code (FLUENT 12.0). Six-degrees-of-freedom (6DOF) rigid-body motion equations issolved with the CFD results through a user-defined function to update the sabot trajectory at every time step. A combination of springbasedsmoothing and local re-meshing is employed to regenerate the meshes around the sabot and describe its movement at each timestep. Computational results show three different separation processes during the sabot discard process. Furthermore, the aerodynamicforces of APFSDS are calculated, and the trajectories of the three sabots are illustrated through the numerical solution of 6DOF equations. The results of the present study agree well with typical experimental results and provide detailed parameters that are important for analyzingthe stability of the projectile. The present computations confirm that the numerical solution of the governing equations of aerodynamicsand 6DOF rigid-body equations are a feasible method to study the sabot discard processes of APFSDS.
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