水下航行体回转水动力数值计算研究

准确预报水动力对水下航行体的安全操纵设计而言至关重要。基于商用软件FLUENT数值求解RANS方程,采用定常旋转坐标系,运用相对运动理论及运动叠加原理,并对控制方程中向心力源项空间离散误差进行修正,预报水下航行体做单平面回转运动的受力及力矩。在Re=11.7×106条件下,力和力矩预报精度的偏差在12%以内,表明所采用的数值预报方法有效、可行,具有较好的工程实用价值。

Numerical Calculation on Hydrodynamic Performance of the Submerged Vehicle in Turning Motion

A numerical procedure based on solving the incompressible RANS equations in a steady rotating coordinate system was developed for the prediction of forces and moments on submerged vehicle in turning motion with the commercial code FLUENT.New method considered numerical dissipation was developed for the correction of centripetal force,and several key elements influenced the solution were also taken into account.In the case of Re=11.7×106,the maximum relative deviation between the calculation results and measured data is less than 12%.The good agreement proves that the method is practical for numerical prediction of the hydrodynamic performance on the submerged vehicle in turning motion.