Simulation on Nonlinear and Unsteady Aerodynamic Characteristicsof Fixed-canard Correction Projectile

QIAN Long;CHANG Sijiang;YANG Wenlong;WEI Wei

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    Published By: Journal Of Ballistics

    CN 32-1343/TJ

Journal Of Ballistics ›› 2020, Vol. 32 ›› Issue (01) : 31-37. DOI: 10.12115/j.issn.1004-499X(2020)01-005

Simulation on Nonlinear and Unsteady Aerodynamic Characteristicsof Fixed-canard Correction Projectile

  • QIAN Long1,CHANG Sijiang1,YANG Wenlong2,WEI Wei3
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Abstract

To accurately obtain the aerodynamic characteristics of a fixed-canard correction projectile,the computational fluid dynamics(CFD)numerical method was used to simulate the flow field of the projectile. The density-based implicit scheme and sliding mesh technique were used to calculate the aerodynamic coefficients of forces and moments of projectiles under the conditions of static,rotational and slow circular motions. The simulation results show that the nonlinear aerodynamic characteristics of lift coefficient and pitch moment coefficient of the projectile are different from those of the general spinning stabilized projectile. The nonlinear terms of pitching moment coefficient is positive in the subsonic region and negative in the supersonic region. The variation of the guided torque coefficient of the projectile correction component with the angle of yaw is intense in the transonic region,but gentle in the non-transonic region. The lift force and pitching moment of the whole projectile are related to the roll angle,the precession angle and the precession velocity.

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trajectory correction projectile / canard / aerodynamic characteristics / nonlinearity

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QIAN Long1,CHANG Sijiang1,YANG Wenlong2,WEI Wei3. Simulation on Nonlinear and Unsteady Aerodynamic Characteristicsof Fixed-canard Correction Projectile. Journal Of Ballistics. 2020, 32(01): 31-37 https://doi.org/10.12115/j.issn.1004-499X(2020)01-005

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