Experimental Study to Improve the Low-Speed Aerodynamic Characteristics for Next Generation Super-Sonic Transport

III. Natural Sciences

石井, 伸一

ISHII, Shinichi

デルタ翼

高揚力装置

Super-Sonic Transport

Delta Wing

High Lift Device

To improve the low-speed aerodynamic characteristics of next generation super-sonic transport at taking off and landing, apex fences are applied to 60-deg delta wing. Visualizing investigation of vortex flow structure and longitudinal force and moment measurements on delta wing with apex fences are presented. Smoke flow visualization and the light sheet technique are being used to obtain cross sectional views of the leading-edge vortices. Total pressure distribution is measured by traversing total-pressure rake and visualized by computer graphics. Combination of total-pressure distribution maps and longitudinal force and moment measurements provide information on the three dimensional nature of the vortex structure induced by apex fence. The fences reduce the apex lift at high angles of attack, leading to a desirable nose-down moment. This projected function of the apex fence device were validated and quantified through low-speed wind tunnel tests.