超空泡航行体操纵过程流体动力特性数值模拟研究

超空泡航行体操舵过程会引起空泡变形,导致航行体流体动力学特性发生变化。为了了解超空泡航行体操舵过程中航行体的动力学特性,文中采用基于欧拉两流体模型的CFD数值模拟方法及动网格技术对超空泡航行体空化器、尾舵操舵过程以及航行体攻角变化过程中的空泡形态及航行体瞬态流体动力特性变化规律进行了研究。研究结果表明空化器操舵过程中空化器升力随偏转角基本呈线性规律变化,对航行体尾部滑行力的影响相对于攻角变化对滑行力的影响为小量;尾舵操舵过程改变了空泡尾部流场,对于航行体尾部滑行力会产生重要影响。

Numerical simulation on the hydrodynamics of supercavitating vehicle in the process of steering

Cavity deformation is caused by the steering of supercavitating vehicle, thus causes the change of hydrodynamics property. In order to understand the hydrodynamics characteristic of supercavitating vehicle during the process of steering. The CFD method based on Euler two-fluid model and moving mesh were used to study the change rule of cavity shape and the transient hydrodynamics during the steering process of cavitator, rudder at the aft section and the change process. The results show that the force changes lin-early with the inclination angle of the cavitator and the influence to the planning force is more seriously during the attack- angle changing process than the cavitator steering process; the flow field is changed at the wake of cavity during the steering process of aft rudder,thus seriously influencing the planning force of vehicle.