实验流体力学2025，Vol.39Issue(1)：71-79,9.DOI:10.11729/syltlx20220071
水下无源流体推力矢量喷管流动特性研究
Research on flow characteristics of underwater passive fluidic thrust vectoring nozzle
摘要
Abstract
We designed an underwater passive fluidic thrust vectoring nozzle.It can easily generate pressure difference on both sides of the primary jet to deflect the jet only by controlling the valves of the secondary flow channel.However,the nonlinear features in the control law of the thrust vectoring angle such as"sudden jump"and"hysteresis"limit the further application of this technology.In this research,the flow characteristics of the primary jet in different transverse sections of the nozzle were studied by the dye flow visualization technology and particle image velocimetry technology.We discovered flow structures such as shear layer vortices,trailing edge backflow,and separation bubbles.Three-dimensional flow structures were also observed,including the transverse flow in the near-wall region and the corner flow at the joint of two walls.The study of the interaction law between flow structures provides a physical model basis for solving the nonlinear problems such as jump and hysteresis of the thrust vectoring control law.关键词
水下推进器/被动二次流/射流/三维流动Key words
underwater thruster/passive secondary flow/jet/three-dimensional flow分类
航空航天引用本文复制引用
冯潮,顾蕴松,方瑞山,周宇航,史楠星..水下无源流体推力矢量喷管流动特性研究[J].实验流体力学,2025,39(1):71-79,9.基金项目
国家自然科学基金面上项目(11972017) （11972017）
