基于Sarrus机构的跨介质航行器变体机翼流体动力学数值仿真

Numerical simulation of fluid dynamics of the trans-media vehicle’s morphing airfoils based on the Sarrus structure

跨介质航行器是一种能够适应水空两种不同介质环境,并且可以自主跨越介质交界面的可持续工作的新型航行器。由于水空两种介质在物理性质上的显著差异,设计变体机翼和跨域推进系统是保证跨介质航行器能够平稳运行的关键点。文中采取变体结构设计方案,提出了一种基于Sarrus机构的跨介质航行器变体机翼。为了研究方案设计在水空两种介质中的可行性,利用Fluent对航行器外部结构进行了流体力学数值仿真,然后根据仿真得到的气动与水动系数,验证了方案设计的可行性,为进一步的研究提供理论支持。

The trans-media vehicle adapts to two different media environments(air and water).Also,it’s a new type of vehicle that can work independently across the medium interface for sustainable work.Because of obvious difference in physical properties between water and air media,the design of the morphing airfoils and the trans-media propulsion system are important to ensure the smooth motion of the media vehicle.This article adopts a morphing structure to propose a morphing airfoil of the trans-media vehicle based on the Sarrus structure.In order to explore the feasibility of the morphing airfoils in water and air media,the aerodynamic and hydrodynamic characteristics of the vehicle’s external structure are identified by means of Fluent.The aerodynamic and hydrodynamic coefficients obtained from the simulation show that the morphing design is feasible.It provides theoretical support for further research.