General Conceptual Design And Analysis Of Flying Wing Unmanned Aerial Vehicle

The study of unmanned combat aerial vehicle (UCAV) overall design is a subject of great value for defense research. This paper mainly deals with the overall framework design of UCAV with the layout of flying wings. On the basis of the three-dimensional shape rebuilding of a UCAV with the layout of flying wings, the paper analyzes its aerodynamic characteristics and flight performance ,and furthermore provides a new approach to the research of flying wings UCAV's aerodynamic characteristics and flight performance.The following three aims would be achieved in this paper:1)Based on the analysis of the present status and future development of domestic and overseas UAV, the first chapter of the paper tries to rebuild the three-dimensional shape for a type of UAV with flying wings with the help of CATIA (a software to rebuild a three-dimensional shape with the help of parameter) and some reference pictures of the UAV.2)According to the data get from some UAV shape rebuilding, the second part of the paper continues to compute UAV's aerodynamic characteristics with the UAV's aerodynamic characteristics analyzing software developed independently by MAV research center of NUAA University. During the computation, the numerical results of pressure distributions in Mark numbers or on different heights, the numerical data of the forces given to the supporting surface of an airfoil and the coefficients of lift force and air resistance as well as some other data are finally worked out therefore, the UAV's aerodynamic characteristics are clearly showed by the data above. Meanwhile, the results of computation also prove a larger scope of this analyzing software.3)The third chapter of this paper also tries to analyze and compute the flight performance of UAV and get a series of data.4)In chapter four, the stealth characteristics of UAV would be analyzed and computed.