### Visualization of air flow using a DC

```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
From the homepage
West Japan Fluid Engineering
Inc.
From the homepage
･Simple structure
(low cost)
･Performance and
high rectification
･Can be
miniaturized
Drawbacks
･Susceptible to effects
from the outside
Circulation type wind
tunnel
･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!
```