为了研究射弹运动过程中的空泡形态和减阻性能,基于Rayleigh-Plesset单一介质可变密度混合多相流模型和6DOF动网格技术,利用Fluent14.0对带圆锥空化器射弹进行了数值研究。分析了超空泡射弹在运动过程中空泡的形成和溃灭过程、射弹的弹道及与全沾湿下射弹速度衰减对比。结果表明随着射弹的运动,弹后空泡逐渐溃灭,射弹有上浮趋势,且射弹减速度逐渐减小,与全沾湿相比,超空泡减阻率高达70.1%。该结果对研究动态超空泡提供了一定的理论依据。

In order to study cavity shape and drag reducible characteristics of supercavitation projectile movement, based on mixture model of a single-fluid with variable density and Rayleigh-Plesset equation and 6DOF dynamic mesh technology, According to software FLUENT14.0, cone cavitation of projectile numerical was studied. Cavity formation and collapse process in movement, ballistic projectile and projectile velocity and attenuation under full wet contrast were analyzed. The results show that with movement of projectile, the cavity after projectile breaking, the projectile tends to be rising, the projectile deceleration decreases. Compared with full wet, supercavitation drag reduction rate gets up to 70.1%. The results provide certain theoretical basis for researching dynamic supercavitation.