Aburaya Narimasa Ogawa Tsukasa Kita Hiroki Takeuchi Yoshiki Cars and planes play an important role. In order to know the effect of wind flow has on the object. Wind tunnel experiments using circulation type tunnel. Creating a DC-type wind tunnel Visualization of wind flow Impact of wind flow on the wing Pursuit of the ideal shape for a wing Circulation type wind tunnel Ebara Hamada Blower Co., Ltd. From the homepage West Japan Fluid Engineering Inc. From the homepage Advantages ･Simple structure (low cost) ･Performance and high rectification ･Can be miniaturized Drawbacks ･Susceptible to effects from the outside Circulation type wind tunnel Advantages ･Less susceptible to external ･Energy Conservation Drawbacks ･Complex structure (high-cost) (mm) For uniform flow Smoke machine (ANTARI Z-800Ⅱ) When there is not a rectifier →Scattered by the wind measurement location When there is a rectifier →Wind speed is slower and stable Unification at 12V Change the wind direction Attach the blower to one side only DT-8880 hot-wire anemometer There's not a rectifier Center Center(Upper side ) Center(Lower side) Upper left Left of center Lower left Upper right Right of center Lower right There is a rectifier There's not a rectifier Center Center(Upper side ) Center(Lower side) Upper left Left of center Lower left Upper right Right of center Lower right There is a rectifier Blowing → Wind speed is unstable Inhaling → Relatively stable ↓ We chose to use the inhaling method. Model of car Videos of the wing model We have confirmed the effect of laminar flow by rectifier. Wind flow is flowing along the objects. We have found the wind that was peeling at the rear of the wing. Wind speed difference is born from the difference in distance above and below the wing There is a possibility that the wind speed difference causes wings to fly. Relationship between elevation and separation of the air flow Relationship between elevation and lift Ideal shape for a wing Thank you for listening!