Underwater vehicle hydrodynamic damping force is crucial to trajectory stability and maneuverability, especially for the vehicle with high angle velocity, thus the accurate prediction of hydrodynamic damping force is important. Based on the CFD method, Reynolds averaged N-S equations based hydrodynamic damping force calculation research is conducted. Combining with dynamic mesh and rotating reference frames, Pitch Damping Force coefficient calculation methods are introduced. Compared with experiment result, the validity and accuracy is proofed. Furthermore, the effect of cavitation is discussed.%水下航行体流体阻尼力关系到弹道的稳定性和操纵性,当航行体以较大角速度机动时阻尼力更是不可忽略,因此准确预示航行体流体阻尼力具有重要意义.以计算流体动力学(Computational Fluid Dynamic,CFD)方法为基础,结合动网格和动坐标系技术,进行基于雷诺平均 N-S 方程的阻尼力计算方法研究,发展针对水下航行体附加力系数和俯仰阻尼力矩系数的数值计算方法,通过与试验数据对比表明,该方法具有较好精度,在此基础上分析了空化现象对流体阻尼力系数的影响.
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