弹道学报2025，Vol.37Issue(2)：11-20,10.DOI:10.12115/ddxb.2024.03004
摆动喷管尾喷压力对水下航行体尾空泡及弹道特性影响研究
The Influence of Swing Nozzle Tail Jet Pressure on the Trailing Cavity and Trajectory Characteristics of Underwater Vehicles
摘要
Abstract
During the vertical movement underwater,vehicles are highly susceptible to the marine environment,leading to unstable motion postures.Uncontrolled and unpowered launching has become inadequate in deep water and strong disturbance conditions.PID control,dynamic fluid body interaction,and dynamic nesting/sliding mesh techniques were employed to construct an integrated numerical calculation method that couples fluid dynamics,motion,and control in this paper.The motion process of underwater controlled-propulsion vehicles,analyzing the evolution of tail cavitation and ballistic characteristics under different tail jet pressures(6 MPa,10 MPa,12 MPa)were numerically simulated.The results show that during the merging process of supersonic jets and tail cavitation,the tail gas mass breaks due to interface instability and nozzle swaying,with the break occurring earlier as nozzle pressure increases.Inside the tail spray cavitation,a complex wave system structure exists.At higher nozzle pressures,the jet is under-expanded,resulting in multiple high and low-pressure areas formed by expansion and compression within the gas bubble.Over time,a Mach disk perpendicular to the axis appears near the nozzle exit.Additionally,the larger the nozzle pressure,the greater the disturbance torque caused by the tail spray flow.Increasing the nozzle pressure from 6 MPa to 12 MPa reduces the maximum deviation angle during motion by 18.5%,decreases the overshoot from 32%to 22%,resulting in less attitude fluctuation and better ballistic stability.关键词
水下航行体/推力矢量控制/喷管压力/尾空泡/弹道特性Key words
submarine vehicle/thrust vector control/nozzle pressure/trailing cavity/trajectory characteristics分类
武器工业引用本文复制引用
吴小安,胡常莉..摆动喷管尾喷压力对水下航行体尾空泡及弹道特性影响研究[J].弹道学报,2025,37(2):11-20,10.基金项目
国家自然科学基金资助项目(52076108) （52076108）
