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

作　　者：冯潮 顾蕴松[1] 方瑞山 周宇航 史楠星 FENG Chao;GU Yunsong;FANG Ruishan;ZHOU Yuhang;SHI Nanxing(Key Laboratory of Unsteady Aerodynamics and Flow Control,Ministry of Industry and Information Technology,College of Aerospace Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)

机构地区：[1]南京航空航天大学航空学院,非定常空气动力学与流动控制工业和信息化部重点实验室,南京210016

出　　处：《实验流体力学》2025年第1期71-79,共9页Journal of Experiments in Fluid Mechanics

基　　金：国家自然科学基金面上项目(11972017)。

摘　　要：本文设计了一种水下无源流体推力矢量喷管,仅通过控制二次流阀门开闭,即可使主射流上下侧产生压差并发生偏转,但推力矢量角控制规律中的“突跳”和“迟滞”等非线性问题限制了该技术的工程应用。采用染色液流动显示技术和粒子图像测速技术,研究了喷管不同横向截面和纵向截面主射流附壁、离壁时的流动特性。研究结果表明:喷管内部存在剪切层旋涡、尾缘倒吸和分离泡等流动结构,同时近壁面存在横向流动,角区存在“角涡”结构。流动结构之间的相互作用规律,为解决推力矢量角控制规律中的“突跳”和“迟滞”等非线性问题提供了物理模型基础。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 

分 类 号：V211.7[航空宇航科学与技术—航空宇航推进理论与工程]