| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a seeding device capable of minimizing ratio of tracer particles with large diameters which contaminate a wind tunnel. <P>SOLUTION: When tracer particles are injected into a hood 12 together with air from a nozzle 16 of a seeder 13, the air is guided by a collision surface 12e of the hood 12 and deflects to downstream direction of the air flow inside a wind tunnel and flows out into the wind tunnel via an opening 12d of the hood 12. Tracer particles having large diameters are not forced to flow with the deflected air because of their great inertia. Rather, they move straight and collide with the collision surface 12e and are captured there, thereby being prevented from being supplied into the wind tunnel. Meanwhile, tracer particles having small diameters are deflected by being forced to flow with the deflected air because of their small inertia and are supplied into the wind tunnel without colliding with and attaching to the collision surface 12e. As a result, supply of tracer particles having large diameters into the wind tunnel can be minimized and contamination of the walls and the floor of the wind tunnel by attached tracer particles having large diameters can be prevented. <P>COPYRIGHT: (C)2012,JPO&INPIT |
