| 摘要: |
| 为了探究预置舵角对跨介质飞行器倾斜入水弹道转平的影响，首先,基于有限体积法，结合SST k-ω湍流模型、VOF模型以及重叠网格技术建立了跨介质飞行器倾斜入水数值仿真模型；其次，分析了预置舵角控制弹道转平的力学作用机理；最后，探究了预置舵角角度对弹道转平的控制效果。结果表明：来流绕流预置舵角的尾舵后，在尾舵迎流面形成滞止高压，而在尾舵背流面形成相对低压，从而形成抬头力矩控制跨介质飞行器的弹道转平；预置舵角角度的增加有利于弹道转平的控制效果，减小了飞行器弹道转平的深度。 |
| 关键词: 跨介质飞行器 倾斜入水 弹道转平 预置舵角 |
| DOI： |
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| 基金项目:国家部委基础科研计划(JCKY2021203B003) |
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| Study on the Flattening Characteristics of Oblique Water Entry Trajectory of Trans-Media Aircrafts |
| REN Zeyu,WANG Xiaogang,KONG Decai,YUAN Kai,CHENG Shengnan |
| (School of Astronautics，Harbin Institute of Technology，Harbin 150001，China;Beijing Institute of Astronautical Systems Engineering, Beijing 100076, China) |
| Abstract: |
| This paper aimed to explore the impact of preset rudder angle on the flattening characteristics of oblique water entry trajectory.Firstly, based on the finite volume method, the numerical calculation model for oblique water entry of trans-media aircrafts was established, in which SST k-ω turbulent flow model, the volume of fluid multiphase flow model and the overlapping mesh technique were adopted.Subsequently, the mechanism of trajectory flattening controlled by preset rudder angle was analyzed.Finally, the control effect of preset rudder angles on trajectory flattening was explored.The result demonstrated that,after the incoming flow passed through the tail rudder with preset rudder angle, the stagnation high pressure was formed on the stoss side of the tail rudder, and the relative low pressure was formed on the slip slope.Thus, torque, that controlled the trajectory flattening, was formed.An increase in preset rudder angle was beneficial to trajectory flattening, which decreased the depth of trajectory flattening of trans-media aircrafts. |
| Key words: Trans-media aircrafts Oblique water entry Trajectory flattening Preset rudder angle |