Aerodynamic microstructures having sub-microstructures
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B64C-001/38
B05D-005/02
B29C-059/02
B29C-047/02
B05D-001/30
B64C-021/10
B63B-001/36
B29L-009/00
B29L-031/30
출원번호
US-0705569
(2015-05-06)
등록번호
US-9868135
(2018-01-16)
발명자
/ 주소
Williams, Timothy Leroy
Rawlings, Diane C.
출원인 / 주소
The Boeing Company
대리인 / 주소
Hanley, Flight & Zimmerman, LLC
인용정보
피인용 횟수 :
0인용 특허 :
73
초록▼
Aerodynamic microstructures having sub-microstructure are disclosed herein. One disclosed example apparatus includes an aerodynamic microstructure on an external surface of a vehicle, and sub-microstructures superimposed on the aerodynamic microstructure, where the sub-microstructures are spaced to
Aerodynamic microstructures having sub-microstructure are disclosed herein. One disclosed example apparatus includes an aerodynamic microstructure on an external surface of a vehicle, and sub-microstructures superimposed on the aerodynamic microstructure, where the sub-microstructures are spaced to reduce reflections.
대표청구항▼
1. An apparatus comprising: an aerodynamic microstructure on an external surface of a vehicle, the aerodynamic microstructure having a pattern of triangular ridges; andsub-microstructures superimposed on the aerodynamic microstructure, wherein the sub-microstructures are spaced to reduce reflections
1. An apparatus comprising: an aerodynamic microstructure on an external surface of a vehicle, the aerodynamic microstructure having a pattern of triangular ridges; andsub-microstructures superimposed on the aerodynamic microstructure, wherein the sub-microstructures are spaced to reduce reflections, wherein spacings between the sub-microstructures are approximately between 0.4 and 0.7 microns, wherein the aerodynamic microstructure has relatively smaller sub-microstructures near a tip of the aerodynamic microstructure and relatively larger sub-microstructures near a valley of the aerodynamic microstructure. 2. The apparatus as defined in claim 1, wherein the aerodynamic microstructure comprises an aircraft riblet. 3. The apparatus as defined in claim 1, wherein surfaces of the sub-microstructures are coated with a reflective coating. 4. The apparatus as defined in claim 1, further comprising a color layer adjacent the aerodynamic microstructure. 5. The apparatus as defined in claim 1, wherein the spacings between the sub-microstructures vary along a length of the aerodynamic microstructure. 6. The apparatus as defined in claim 1, wherein the spacings between the sub-microstructures vary along a direction of flow along the aerodynamic microstructure. 7. An apparatus comprising: an aerodynamic microstructure on an external surface of a vehicle; andsub-microstructures superimposed on the aerodynamic microstructure, wherein the sub-microstructures are spaced to reduce reflections, wherein spacings between the sub-microstructures are approximately a wavelength of visible light, wherein the aerodynamic microstructure has relatively smaller sub-microstructures near a tip of the aerodynamic microstructure and relatively larger sub-microstructures near a valley of the aerodynamic microstructure. 8. The apparatus as defined in claim 7, wherein the spacings between the sub-microstructures are less than about 0.4 microns. 9. The apparatus as defined in claim 7, wherein the spacings between the sub-microstructures are between about 0.4 and 0.7 microns. 10. The apparatus as defined in claim 7, wherein the aerodynamic microstructure comprises an aircraft riblet. 11. A method comprising: operating a vehicle, wherein sub-microstructures are superimposed on aerodynamic microstructures of the vehicle, and wherein the sub-microstructures are separated by distances approximately between 0.4 and 0.7 microns to reduce reflections, the aerodynamic microstructures having a pattern of triangular ridges, wherein the aerodynamic microstructures have relatively smaller sub-microstructures near a tip corresponding to each of the aerodynamic microstructures and relatively larger sub-microstructures near a valley corresponding to each of the aerodynamic microstructures. 12. The method as defined in claim 11, wherein the aerodynamic sub-microstructures have differing geometries from bases of the microstructures to tips of the aerodynamic microstructures. 13. The method as defined in claim 11, wherein the sub-microstructures are machined onto the aerodynamic microstructures. 14. The method as defined in claim 11, wherein the sub-microstructures have one or more of a triangular shape, a grooved shape, a sinusoidal shape, a parabolic shape, a cone shape, a cylindrical shape, or a plurality of indentations. 15. A method comprising: providing sub-microstructures on an aerodynamic microstructure, wherein the sub-microstructures are spaced to reduce reflections, wherein spacings between the sub-microstructures are approximately between 0.4 and 0.7 microns, the aerodynamic microstructure having a pattern of triangular ridges, wherein the aerodynamic microstructure has relatively smaller sub-microstructures near a tip of the aerodynamic microstructure and relatively larger sub-microstructures near a valley of the aerodynamic microstructure. 16. The method as defined in claim 15, wherein providing the sub-microstructures comprises machining, casting or extruding the sub-microstructures onto the aerodynamic microstructure. 17. The method as defined in claim 15, wherein providing the sub-microstructures comprises embossing the sub-microstructures onto the aerodynamic microstructure. 18. The method as defined in claim 15, wherein providing the sub-microstructures comprises machining or embossing the microstructure. 19. The method as defined in claim 15, further comprising aligning a tool to provide the sub-microstructures onto the aerodynamic microstructure, and wherein providing the sub-microstructures is done via the tool. 20. The method as defined in claim 19, wherein the tool is an embossment tool. 21. A method comprising: providing a textured external surface, via a tool, onto a riblet having a pattern of triangular ridges, the riblet associated with an external surface of a vehicle to reduce glint, wherein spacings between sub-microstructures of the textured external surface are approximately between 0.4 and 0.7 microns to reduce reflections, wherein the riblet has relatively smaller sub-microstructures near a tip of the riblet and relatively larger sub-microstructures near a valley of the riblet. 22. The method as defined in claim 21, wherein the sub-microstructures have one or more of a triangular shape, a grooved shape, a sinusoidal shape, a cone shape, a cylindrical shape, a parabolic shape or a plurality of indentations. 23. The method as defined in claim 21, wherein peaks of the riblets are approximately 10-200 microns in height relative to valleys of the riblet. 24. The method as defined in claim 21, wherein the vehicle comprises an aircraft. 25. An apparatus comprising: an aerodynamic microstructure on an external surface of a vehicle, the aerodynamic microstructure having primary peaks and base surfaces between the primary peaks; andsecondary peaks on or proximate the base surfaces, the secondary peaks having heights less than one-third of heights of the primary peaks, wherein the secondary peaks are located on an interface between a base portion of the aerodynamic microstructure and a color layer. 26. The apparatus as defined in claim 25, wherein one or more of the primary peaks or the secondary peaks have sub-microstructures superimposed thereon. 27. The apparatus as defined in claim 26, wherein one or more of the primary peaks or the secondary peaks are ridge-shaped. 28. The apparatus as defined in claim 27, wherein the primary and secondary peaks are ridge-shaped, and wherein ridges of the primary and the secondary peaks extend substantially parallel to one another.
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