抄録
In the design process of aircraft, surface flow visualization is typically required to know separation pattern on a wing and other control surfaces in order to increase lift coefficient, lift-drag ration and stall angle of attack. Therefore, seemingly classic techniques have been used in current airframe development. In JAXA's research project for design technology of high-lift device, fluorescent oil flow visualization was applied to realistic aircraft configuration model. At first oil flow method using fluorescence material was compared to the traditional method using titanium dioxide. Following that, as a result of the visualization, aerodynamic interferences between a nacelle and a wing, optimum position of the flap were obtained in relation to the aerodynamic performance.
