An apparatus comprises a platform configured to move in a streamwise direction, an actuation unit associated with a control surface of the platform, a fluid source configured to supply an airflow to the actuation unit, and a control unit for moving an air jet across the control surface. The actuatio
An apparatus comprises a platform configured to move in a streamwise direction, an actuation unit associated with a control surface of the platform, a fluid source configured to supply an airflow to the actuation unit, and a control unit for moving an air jet across the control surface. The actuation unit is configured to form a traversing air jet pointing in the streamwise direction.
대표청구항▼
1. An apparatus comprising: a platform configured to move in a streamwise direction, the platform having a control surface;an actuation unit associated with the control surface, the actuation unit including an inner element having a helical slot, the actuation unit also including an outer element ha
1. An apparatus comprising: a platform configured to move in a streamwise direction, the platform having a control surface;an actuation unit associated with the control surface, the actuation unit including an inner element having a helical slot, the actuation unit also including an outer element having a lateral slot, wherein the inner element is located inside the outer element;a fluid source configured to supply an airflow to the actuation unit, the actuation unit configured to form an air jet flowing in the streamwise direction, and the inner element configured to receive the airflow from the fluid source; anda control unit for moving the air jet across the control surface. 2. The apparatus of claim 1, further comprising: a motor associated with the control unit, the motor configured to cause the inner element to rotate, wherein the control unit is configured to move the air jet across the control surface by regulating a rotational speed of the inner element and wherein the control unit is configured to regulate a pressure of the airflow. 3. The apparatus of claim 2, wherein: a number of portions of the helical slot overlap with the lateral slot, wherein the control unit is further configured to regulate the pressure to push the airflow out of the number of portions to form a number of air jets that flow in the streamwise direction. 4. The apparatus of claim 3, wherein the inner element is configured to rotate inside the outer element such that the number of portions of the helical slot that overlap with the lateral slot are moved in a periodic motion, wherein the number of air jets are configured to move across the surface of the control surface, and wherein the number of air jets moving across the surface of the control surface are configured to increase an amount of lift generated by the control surface. 5. The apparatus of claim 1, wherein the platform is an aircraft, wherein the control surface is a flap, wherein the actuation unit is located inside the flap, and wherein the flap and the actuation unit are configured such that the air jet flows out of an ejection slot of the flap. 6. The apparatus of claim 5, further comprising: a number of actuation units located inside the flap, wherein the fluid source is configured to send the airflow to the number of actuation units, wherein the number of actuation units are configured to form a number of air jets flowing in the streamwise direction, wherein the number of air jets are configured to move across an upper surface of the flap, and wherein the upper surface is substantially an entire length of the flap. 7. The apparatus of claim 1, wherein the control surface is a wing, wherein actuation unit is located inside the wing, and wherein the air jet is configured to flow out of an ejection slot of the wing. 8. The apparatus of claim 1, wherein the platform is an aircraft and wherein the fluid source is one of an air compressor of the aircraft and an engine of the aircraft. 9. An apparatus comprising: a control surface of an aircraft, the control surface extending in a spanwise direction of the aircraft and having an ejection slot extending in the spanwise direction;an outer cylinder located inside the control surface and centered on an axis, the outer cylinder having a lateral slot aligned with the ejection slot;an inner cylinder located inside the outer cylinder and centered on the axis, the inner cylinder having a helical slot, wherein the helical slot wraps around an outer surface of the inner cylinder, wherein a number of portions of the helical slot overlap with the lateral slot, and wherein the inner cylinder is configured to rotate inside the outer cylinder; anda fluid source configured to send an airflow into the inner cylinder. 10. The apparatus of claim 9, further comprising: a control unit, wherein the control unit is configured to regulate a pressure of the airflow, wherein a motor associated with the control unit is configured to cause the inner cylinder to rotate, wherein the apparatus is configured such that the pressure pushes the airflow out of the number of portions to form a number of air jets that flow in a direction that is substantially perpendicular to the axis, wherein the number of air jets are configured to move across a surface of the control surface in a direction that is substantially parallel to the axis, and wherein the number of air jets moving across the surface of the control surface is configured to increase an amount of lift generated by the control surface. 11. The apparatus of claim 10, wherein the apparatus is further configured such that inner cylinder rotating inside of the outer cylinder moves the number of portions in a periodic motion and wherein the number of air jets are configured to move in a periodic motion across a surface of the control surface in a direction that is substantially parallel to the axis. 12. The apparatus of claim 11, wherein the control unit is configured to regulate a rotational speed of the inner cylinder to adjust a speed of the periodic motion of the number of air jets moving across the surface of the control surface. 13. The apparatus of claim 9, wherein the control surface is a flap, wherein the outer cylinder and the inner cylinder are located inside the flap, and wherein the number of air jets are configured to flow out of the ejection slot of the flap. 14. A method of moving air across a control surface of an aircraft, the method comprising: forming a slot on the control surface of the aircraft, the slot extending in a spanwise direction; sending a stream of air out of a portion of the slot, wherein the stream of air flows in a streamwise direction of the aircraft; andmoving the stream of air in a periodic motion along the spanwise direction of the slot, wherein moving the stream is accomplished by directing air from a source into an inner element disposed inside the control surface, out of a helical slot in the inner element, into an outer element disposed inside the control surface, and out of a lateral slot of the outer element. 15. The method of claim 14, wherein sending the air from a fluid source into an actuation unit of the control surface of the aircraft increases an amount of lift generated by the control surface of the aircraft. 16. The method of claim 15, further comprising: regulating a pressure of the air by a control unit;wherein the pressure pushes the stream of air out the portion of the slot; andregulating a speed of the periodic motion of the stream of air. 17. The method of claim 15, wherein the control surface is a flap and wherein the stream of air flows out of an ejection slot of the flap. 18. The method of claim 17, further comprising: sending a number of streams of air out a number of portions of the ejection slot, wherein the number of streams of air flow in a streamwise direction of the aircraft; andmoving the number of streams of air in periodic motions along the spanwise direction of the ejection slot, wherein the number of streams of air moves across an upper surface of the flap, and wherein the upper surface is substantially an entire length of the flap. 19. The method of claim 15, wherein the control surface is a wing and wherein the number of streams of air flows out of an ejection slot of the wing. 20. The method of claim 14, wherein the source is one of an air compressor of the aircraft and an engine of the aircraft. 21. A method of producing an air jet, the method comprising: positioning an outer element inside a control surface of a platform, the outer element having a lateral slot;positioning an inner element inside the outer element, the inner element having a helical slot, wherein the helical slot wraps around an outer surface of the inner element and wherein a number of portions of the helical slot overlap with the lateral slot;sending an airflow into the inner element by a fluid source; androtating the inner element inside the outer element by a motor, wherein rotating includes the airflow moving through the helical slot of the inner element, through the lateral slot of the outer element, and out of the control surfaces. 22. The method of claim 21, further comprising: regulating a pressure of the airflow by a control unit; andregulating a rotational speed of the inner element. 23. The method of claim 21, wherein the platform is an aircraft, wherein the control surface is a flap having an ejection slot, further comprising: aligning the lateral slot with the ejection slot, wherein the outer element and the inner element are located inside the flap. 24. The method of claim 21, wherein the platform is an aircraft, wherein the control surface is a wing having an ejection slot, and further comprising: aligning the lateral slot with the ejection slot, wherein the outer element and the inner element are located inside the wing. 25. The method of claim 21, wherein the fluid source is one of an air compressor of the aircraft and an engine of the aircraft. 26. The apparatus of claim 1, wherein the inner element is configured to rotate inside the outer element.
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Armanios Erian A. ; Dancila D. Stefan, Apparatus and method for aerodynamic blowing control using smart materials.
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