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Visualization of air flow using a Direct current-type wind tunnel

Visualization of air flow using a Direct current-type wind tunnel. Aburaya Narimasa Ogawa Tsukasa Kita Hiroki Takeuchi Yoshiki. Research motive. Cars and planes play an important role . In order to know the effect of wind flow has on the object.

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Visualization of air flow using a Direct current-type wind tunnel

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  1. Visualization of air flow using a Direct current-type wind tunnel AburayaNarimasa Ogawa Tsukasa Kita Hiroki Takeuchi Yoshiki

  2. Research motive • 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.

  3. Purpose • 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

  4. DC-type wind tunnel Circulation type wind tunnel Ebara Hamada Blower Co., Ltd. From the homepage West Japan Fluid Engineering Inc. From the homepage

  5. DC-type wind tunnel 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)

  6. Wind tunnel that we used (mm)

  7. Experiment 1 Verification of the effects of the rectifier • For uniform flow

  8. Visualization of wind flow Smoke machine (ANTARI Z-800Ⅱ)

  9. Effect of Rectifier on wind speed • When there is not a rectifier →Scattered by the wind measurement location • When there is a rectifier →Wind speed is slowerand stable

  10. Conditions • Unification at 12V • Change the wind direction • Attach the blower to one side only

  11. Wind speed measuring instrument DT-8880 hot-wire anemometer

  12. Experiment setup

  13. About uniformity of wind speed(send the wind) (m/s)

  14. About uniformity of wind speed(inhale the wind) (m/s)

  15. Considerations of Experiment 1 Blowing→Wind speed is unstable Inhaling → Relatively stable ↓ We chose to use the inhaling method.

  16. Experiment 2Visualization of wind flow Model of car Videos of the wing model

  17. Consideration of Experiment 2 • 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.

  18. Experiment 3 Why float the wing?

  19. Prediction • Wind speed difference is born from the difference in distance above and below the wing

  20. Experimental method

  21. Measuring method

  22. Considerations of Experiment 3 • There is a possibility that the wind speed difference causes wingsto fly.

  23. Future prospects • Relationship between elevation and separation of the air flow • Relationship between elevation and lift • Ideal shape for awing

  24. Thank you for listening!

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