Tracer particles together with air are jetted from a nozzle of a seeder into a hood, the air is guided by a collision surface of the hood, deflected to a downstream side in an airflow direction in a wind tunnel, and flows out into the wind tunnel through an opening of the hood. Tracer particles havi
Tracer particles together with air are jetted from a nozzle of a seeder into a hood, the air is guided by a collision surface of the hood, deflected to a downstream side in an airflow direction in a wind tunnel, and flows out into the wind tunnel through an opening of the hood. Tracer particles having a large diameter fly straightly without being drifted by the deflected air and collide with the collision surface and are trapped thereon and are prevented from being supplied into the wind tunnel. Tracer particles having a small diameter are drifted by the deflected air, thereby deflected, and supplied into the wind tunnel without collision with and adhesion to the collision surface.
대표청구항▼
1. A seeding device for supplying a wind tunnel with tracer particles jetted together with air from a nozzle of a seeder, the seeding device comprising: a collision surface inclined with respect to a jetting direction of the tracer particles from the nozzle; anda hood which covers the nozzle and the
1. A seeding device for supplying a wind tunnel with tracer particles jetted together with air from a nozzle of a seeder, the seeding device comprising: a collision surface inclined with respect to a jetting direction of the tracer particles from the nozzle; anda hood which covers the nozzle and the collision surface on an upstream side in an airflow direction in the wind tunnel, and which has an opening formed therein on a downstream side in the airflow direction, whereinamong the tracer particles jetted from the nozzle, tracer particles having a large diameter collide with the collision surface and are trapped thereon, andtracer particles having a small diameter are supplied into the wind tunnel through the opening of the hood,wherein a flange is formed to extend over a substantially entire portion of the opening of the hood where the tracer particles supplied into the wind tunnel pass, the flange being folded inwardly at an obtuse angle. 2. The seeding device according to claim 1, wherein the collision surface has an inclination angle of substantially 45°. 3. The seeding device according to claim 1, further comprising a drain hole formed in a lower portion of the hood, the drain hole draining an oil droplet of the trapped tracer particles. 4. The seeding device according to claim 1, wherein the opening of the hood is formed only at a position that is opposed to and faces a downstream side of the collision surface. 5. The seeding device according to claim 4, wherein at least a portion of the opening and the collision surface are disposed at a same height from the nozzle of the seeder in the jetting direction. 6. The seeding device according to claim 1, wherein the opening extends from an upper end portion of the hood to a lower end potion of the hood and the flange is formed along an upper end to a lower end of the opening and wherein a drain hole is formed in the lower end portion of the hood for draining an oil droplet of the tracer particles trapped on the collision surface. 7. The seeding device according to claim 1, wherein the flange has an outer surface, exposed to an airflow in the wind tunnel, formed to be curved concave and thus an inner surface of the flange is curved convex toward an inside of the hood. 8. The seeding device according to claim 1, wherein the hood comprises a body portion having the opening defined through a portion thereof, and the flange extends from the body portion and defines at least a portion of a peripheral edge of the opening of the hood, the flange extending from the body portion and being folded inwardly at the obtuse angle toward the opening of the hood relative to an inner surface of the body portion from which the flange extends. 9. The seeding device according to claim 1, wherein the collision surface is spaced at a distance from the nozzle of the seeder in the jetting direction such that, among the tracer particles jetted from the nozzle, tracer particles having a diameter larger than a predetermined diameter collide with the collision surface and are trapped thereon, and tracer particles having a diameter smaller than the predetermined diameter do not collide with the collision surface and are supplied into the wind tunnel through the opening of the hood. 10. The seeding device according to claim 1, further comprising the nozzle jetting tracer particles with air at a predetermined jetting speed, wherein the collision surface is spaced at a distance from the nozzle in the jetting direction such that, for the predetermined jetting speed, among the tracer particles jetted from the nozzle, tracer particles having a diameter larger than a predetermined diameter collide with the collision surface and are trapped thereon, and tracer particles having a diameter smaller than the predetermined diameter do not collide with the collision surface and are supplied into the wind tunnel through the opening of the hood. 11. The seeding device according to claim 1, wherein among the tracer particles jetted from the nozzle, the tracer particles having the small diameter are supplied into the wind tunnel through the opening of the hood without colliding with the collision surface. 12. A seeding device comprising a hood for guiding air and tracer particles jetted from a nozzle of a seeder to deflect a flow passage, the seeding device configured such that the deflected air and tracer particles are supplied into a wind tunnel through an opening of the hood, wherein a flange is formed to extend over a substantially entire portion of the opening of the hood where the deflected air and the tracer particles supplied into the wind tunnel pass, the flange being folded inwardly at an obtuse angle. 13. The seeding device according to claim 12, wherein the hood includes a collision surface inclined with respect to a jetting direction of the tracer particles from the nozzle, andamong the tracer particles jetted from the nozzle, tracer particles having a large diameter collide with the collision surface and are trapped thereon, andtracer particles having a small diameter are supplied into the wind tunnel through the opening of the hood. 14. The seeding device according to claim 13, wherein the collision surface has an inclination angle of substantially 45°. 15. The seeding device according to claim 13, further comprising a drain hole formed in a lower portion of the hood, the drain hole draining an oil droplet of the trapped tracer particles. 16. The seeding device according to claim 13, wherein the opening of the hood is formed only at a position that is opposed to and faces a downstream side of the collision surface. 17. The seeding device according to claim 12, further comprising a drain hole formed in a lower portion of the hood, the drain hole draining an oil droplet of the trapped tracer particles. 18. The seeding device according to claim 12, wherein the hood is provided in the wind tunnel and the flange has an outer surface, exposed to an airflow in the wind tunnel, formed to be curved concave and an inner surface of the flange is curved convex toward an inside of the hood, so that part of a vortex generated on a downstream side of the outer surface of the flange in the direction of the airflow in the wind tunnel flows along the inner surface of the flange in a direction reverse to a direction of airflow inside the hood. 19. The seeding device according to claim 12, wherein the hood comprises a body portion having the opening defined through a portion thereof, and the flange extends from the body portion and defines at least a portion of a peripheral edge of the opening of the hood, the flange extending from the body portion and being folded inwardly at the obtuse angle toward the opening of the hood relative to an inner surface of the body portion from which the flange extends.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (2)
Karim Benalikhoudja FR, Spraying attachment and appliance.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.