Conceptual Design And Energy Management System Optimization For A Blended Wing Body Solar Unmanned Aircraft

Unmanned aerial vehicles have advantages of high maneuverability, cost-effective, flexible use and so on, it has been widely used in both civil and military fields. In order to improve the endurance performance of UAV, solving the energy and power issues is very important, and is the bottleneck of the development of UAV life. Solar energy is a clean and effective energy source of the UAV in the future, with the development of the key technology of the energy collection, high density energy storage, high propulsion system and energy system stability of solar energy, solar-powered UAV will become an important development direction of long endurance UAV.In the development of solar-powered UAV, conventional layout UAV of high aspect ratio has good lift to drag characteristics and larger laying area of solar cells, it has been used by most solar-powered UAV, but the aerodynamic layout is often accompanied by the problem of insufficient strength and stiffness of the wing. However, tailless blended wing body UAV with its excellent aerodynamic characteristics, high internal capacity and large body area can also be used as the layout form of the solar-powered UAV, and it can make up for the problem of insufficient strength and stiffness of the wing. According to the design requirements of a s olar-powered UAV, this article put forward a tailless blended wing body layout form and completed overall design. Meanwhile, we optimized configuration design and airfoil design used in fuselage by distributed loop multi-objective optimization, and used CFD method to analyze aerodynamic performance of UAV. At last, we designed energy management system of solar-powered UAV and optimized energy management strategy.