跨域无人平台水面垂直起飞动态特性数值模拟  

Numerical simulation of dynamic performance of trans-media unmanned vehicle during vertical take-off from water

作　　者：邱磊 郑巢生 QIU Lei;ZHENG Chaosheng(Project Management Center of Naval Equipment Department,Beijing 100071,China;National Key Laboratory on Ship Vibration and Noise,China Ship Scientific Research Center,Wuxi 214082,China)

机构地区：[1]海装重大专项装备项目管理中心,北京100071 [2]中国船舶科学研究中心船舶振动噪声重点实验室,江苏无锡214082

出　　处：《中国舰船研究》2022年第1期51-59,共9页Chinese Journal of Ship Research

摘　　要：[目的]旨在研究跨域无人平台从水面垂直起飞过程中平台的运动及动力学特性。[方法]采用黏流CFD方法结合重叠网格技术和多自由度DFBI(dynamic fluid body interaction)运动模型,针对跨域无人平台在水面垂直起飞至空中的跨域过程的动态特性,开展数值模拟研究。[结果]模拟结果显示:在垂直起飞过程中,受无人平台上升阻力的影响,空气螺旋桨需要以相对于单桨等拉力状态更高的转速才能将无人平台拉起升离水面,且无人平台的主运动为垂向上升运动;此外,因空气螺旋桨的下洗气流与无人平台机身的耦合作用,导致平台出现了"快速低头"现象。[结论]由模拟结果可知,为保证无人平台顺利升空,在从水面至空中的垂直起飞阶段必须加入手动或自动的控制程序,以实时调整推进器的倾转角度,从而为后续跨域无人平台优化设计及控制提供有力的评估手段。[Objectives]This paper aims to study the kinetic and dynamic characteristics of an trans-media unmanned vehicle during vertical take-off from water.[Methods]Its dynamic performance during the transmedia process from water to air is numerically simulated on the basis of the viscous computational fluid dynamics(CFD)approach combined with the overset grid technique,multiple degrees of freedom and dynamic fluid body interaction(DFBI)motion model.[Results]The results show that in order to pull the vehicle up,the air propeller rotation speed should be higher than the speed at the same pull force provided by a single propeller.As the main movement of the vehicle is vertically upward,the coupling of the air propeller downwash flow velocity and the fuselage of the vehicle leads to the"quick bowing"phenomenon.[Conclusions]To ensure smooth take-off,a manual or automatic control program should be added to adjust the tilt angle of the thrusters in real time during the take-off process.This study provides a powerful evaluation method for the optimal design and control of trans-media unmanned vehicle in the future.

关 键 词：跨域无人平台 垂直起飞 数值模拟 重叠网格 DFBI 

分 类 号：U661.313[交通运输工程—船舶及航道工程]