Efficient Geometry Representation of Airframe Based on simulation

In this presentation, a geometry representation method for a wing/fuselage configuration is discussed for arbitrary civil aircrafts. For a wing design, five airfoil geometries are defined using modified PASEC airfoil representation for the taper wing which has a kink. In addition, the positions and the sizes of each airfoil, aspect ratio, dihedral angle and wash-out can be changed. Fuselage geometry is basically defined as a tube. To achieve more realistic design, polynomial functions are used to represent the geometry of fuselage around the wing root, the fuselage nose and the tail. After the solid model of the wing/fuselage, the unstructured mesh is generated for flow simulation. To investigate proposed methods, parameter identification with existing transonic aircrafts\u27 model is carried out. Their geometries and flow fields are investigated. This result suggests that the proposed methods can represent various geometries well and the fuselage geometry around the wing root is effective to the aerodynamic performance. Thus, the design representation proposed here has possibility to be useful for the aircraft design using data mining.精密工学会 Design Symposium (発表No: dss10-0057