不同通气量下双发航行体水下齐射降载增稳特性研究

STUDY ON LOAD REDUCTION AND STABILITY INCREASE CHARACTERISTICS UNDER DIFFERENT VENTILATION OF THE SUBMARINE-LAUNCHED SALVOED VEHICLES

基于重叠网格技术,VOF(volume of fluid)多相流模型以及改进型分离涡模型相结合方法,建立了基于主动通气下双体水下齐射降载增稳数值方法,分析了通气量对空泡形态、载荷特性及运动稳定性的影响规律。结果表明:在一定范围内,随着通气量的增加,当通气空泡完全包裹航行体孔口下方区域后,横向载荷幅值和交变峰值均减小,同时,产生的扶偏力矩能够大幅度减小双发航行体之间狭长流域产生的流动干扰现象。另外,为了避免发生共振现象,设计航行体时应尽量使其固有频率在通气效应产生的低频范围之外。综合分析,主动通气方式对多体水下齐射运动姿态的不稳定性具有较好的改善作用。

Based on the overlapping grid technique,VOF(Volume of Fluid)multiphase flow model and improved delayed detached eddy,a numerical method is established to reduce the load and increase the stability of double vehicles under active ventilation.And it analyzes the influence of ventilation on cavity morphology,load characteristic and motion stability.After the ventilated cavity completely encloses the region below the orifice of the vehicle,the amplitude and an alternating peak of the transverse load decrease with the increase of the certain ventilation capacity.At the same time,the deflection torque can greatly reduce the flow interference in the narrow flow field between double vehicles.To avoid resonance,the natural frequency of the vehicle should be kept outside the low-frequency range generated by the ventilation effect.Therefore,active ventilation technology can improve the motion instability of multiple vehicle salvos.