Design Of Wearable Flapping-Wing Aircraft And Analysis Of Aerodynamic Characteristics

Wearable flapping wing aircraft is a new attempt and research in the field of small aircraft and it can be applied to special operations to overcome the shortcomings of traditional parachuting,such as low speed,short gliding distance and poor concealment.In order to improve the design efficiency and stimulate the design thinking in the conceptual design of wearable flapping wing aircraft,an innovative design method of product shape based on genetic algorithm and edge detection is proposed in this paper,which provides basis for follow-up research and development.Aerodynamic characteristics of aircraft are research emphasis in conceptual design of aircraft and the flight mechanism and rules of different wing shapes are summarized by comparing the aerodynamic characteristics of different wing shapes,which can guide the design of wearable flapping wing aircraft.The main contents of this paper are as follows :(1)Different product innovative design theories and the research status of wearable aircraft are introduced in this paper.The application of CFD in aerodynamic analysis is also introduced in this paper.The definition,classification and application of wearable aircraft are described.The design elements of wearable aircraft are analyzed from the point of view of design DNA.The main dimensions and flight state parameters of wearable flapping-wing aircraft are determined by ergonomics.(2)This paper presents an innovative design method for product modeling,which is used to innovate the design of wearable aircraft.The classical edge detection method is applied to extract the wing characteristic curve of the parent sample,and the eighth neighborhood based edge search algorithm is used to coordinate the wing characteristic curve of the parent sample.The binary tree curve partition method is used to code the characteristic curve with morphological gene,and the genetic operator operation is applied to obtain the offspring morphological gene bank.The shape gene bank is used to guide the design of wearable aircraft model.(3)The theoretical basis of CFD numerical calculation is elaborated.The three-dimensional modeling and computing domain of seven different types of wings are established,and the network is divided by Gambit.Fluent is used to analyze the aerodynamicdata,pressure nephogram and streamline graph of different wing shapes.The effects of morphological genes on the flight mechanism and flow around the wing are studied and summarized,and the most suitable morphological genes are obtained.(4)Aerodynamic characteristics of oval shape gene wing are studied in detail.The aerodynamic performance analysis of elliptical wing with different forward-convex angles is carried out by changing the forward-convex angle of elliptical wing with variable parameter analysis method.It is found that there is an optimal forward-convex angle to optimize the aerodynamic performance of elliptical wing.Combining with the research results,the optimal design of the wearable flapping wing aircraft is carried out.