Three-dimensional Reconstruction And Aerodynamic Optimization Design Of The New Civil Aircraft B797

With advances in aerospace technology, passenger aircraft as one of the main travel methods has been rapidly developed. New technologies and materials also have been used more and more. Blended wing body as a new form of airframe layouts get more and more attention. In this paper, Blended wing body passenger aircraft B797 as research subjects, according to the basic information of aircraft and three views and using passive three-dimensional reconstruction, has been reconstructed three-dimensional model of the aircraft.Aerodynamic characteristics of the modern large passenger aircraft is very important Computational fluid dynamics provides a new way to study the aerodynamic characteristics of the aircraft. In this paper, basing on a three-dimensional model of the aircraft, aircraft have been meshed by using unstructured grid, aerodynamic characteristics of the aircraft have been simulated by using fluent software, the passenger aircraft lift and drag characteristics under different Mach number and angle of attack have been calculated, and aircraft flight performance has been researched. With distribution of surface pressure under different conditions, aircraft in the shock and stall situation has been discussed.Wing is the soul of aircraft. As the main lift component of aircraft, airfoil optimization of wing has been an important aspect of aircraft design optimization. In this paper, the method of supercritical airfoil design optimization has been researched and developed. A CST parametric approach of aircraft geometry has been established. CFD has been used to mesh generation automatically. Feasibility of the method and multi-island genetic algorithm have been combined to optimized the lift-drag ratio of supercritical airfoil.