一种双体导弹气动特性数值模拟

双体导弹是一种通过弹翼将2个单体导弹机体连接为一体的特殊构型导弹,因此具有独特的气动特性。基于FLUENT软件采用S-A(Spalart-Allmaras)湍流模型分析了单体导弹和双体导弹在不同马赫数及迎角状态下的气动特性,研究了2种构型的气动特性差异。计算结果表明:双体导弹较单体导弹拥有更优的升力能力,但其所受阻力更大,升阻比下降;2种构型导弹阻力均随着迎角的增大而减小,且马赫数越大其减小幅度越小。

Numerical Simulation of Aerodynamic Characteristics of a Double-body Missile

The double-body missile is a special-structured missile that is formed by two single missile bodies connected together through a shared wing,and thus has unique aerodynamic characteristics.Using the FLUENT software,and spalart-allmaras(S-A)turbulence model,aerodynamic characteristics of single and double-body missiles under different Mach number and angle of attack are analized.The aerodynamic characteristics differences between the two configurations are studied.The calculation results show that:a double-body missile has better lift capacity than a single-body missile,but its resistance is greater,and the lift-to-drag ratio decreases.The resistance of the two types of missile decrease with the increase of attack angle,and their drag reduction amplitudes decrease along with the increase of Mach number.