Numerical Analysis of Separation of Supersonic Submunition Based on Nested Grid

doi:10.3969/j.issn.1000-1093.2019.01.010

Abstract

Abstract: To study the separation flow field and aerodynamic characteristics of supersonic submunition, the nested grid technique and the finite volume method are used to discretize Navier-Stokes equations of three-dimensional viscous compressible flow, and simultaneously solve the kinematic equations and dynamics equations of 6-degree-of-freedom (DOF) rigid body. The 6-DOF rigid body motion is coupled with computational fluid dynamics (CFD) to simulate the separation process of submunition at supersonic speed. The characteristics of flow field in the separation of submunition and its initial separation state (such as initial flight velocity and initial attitude angle, etc) were analyzed. The results show that the nested grid technique can be well used to simulate the complex interferent flow field of supersonic submunition. Under the supersonic separation condition, the higher the initial flight speed is when a submunition is removed from cluster munition, the smaller the separation angle of attack is, and the submunition can be separated more quickly and safely. Key

Key words: submunitionseparation, nestedgrid, numericalsimulation, computationalfluiddynamics, 6-degree-of-freedom

CLC Number:

TJ762.2⁺5

ZHANG Manman， JIANG Yi， CHENG Lidong， YANG Hua， LIU Qi. Numerical Analysis of Separation of Supersonic Submunition Based on Nested Grid[J]. Acta Armamentarii, 2019, 40(1): 79-88.

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第40卷第1期
2019 年1月兵工学报ACTA
ARMAMENTARIIVol.40No.1Jan.2019

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