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특허 상세정보

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Drag reduction method and surface

특허상세정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) B64C-021/10   
미국특허분류(USC) 244/200 ; 244/130 ; 244/203
출원번호 US-0341565 (1989-04-21)
발명자 / 주소
출원인 / 주소
인용정보 피인용 횟수 : 44  인용 특허 : 0
초록

Rearward facing microsteps (11, 12, 20, 21) are provided in a wall surface (10, 10a, 10b, 19, 19a, 19b) to reduce shear friction drag caused by wall surface bounded turbulent shear flows. Microsteps combined with phased tangential flow injection adjacent the microsteps are also described. These reduce the drag caused by eddy currents. The surface is useful in any setting where turbulent flow occurs to create eddy currents such as airplanes, boats, vehicles, conduits and the like.

대표
청구항
▼

A device which reduces skin friction drag caused by wall surface bounded turbulent shear flow of a fluid by controlling the flow characteristics within the wall surface bounded shear flow through interference with eddy current formation and interactions near the wall surface which comprises microsteps each with a downstream facing face in the surface oriented across a mean flow direction along the wall surface and stepped down in the mean flow direction, wherein the face of each of the microsteps has a height on the order of magnitude of a sublayer thick...

이 특허를 인용한 특허 피인용횟수: 44

  1. Williams, Timothy Leroy; Rawlings, Diane C.. Aerodynamic microstructures having sub-microstructures. USP2018019868135.
  2. Tanaka, Motofumi; Matsuda, Hisashi; Yasui, Hiroyuki; Goshima, Shohei; Shimura, Naohiko; Wada, Kunihiko; Ozaki, Tamon; Osako, Toshiki; Asayama, Masahiro; Uchida, Yutaka. Airflow control device and airflow control method. USP2016039297260.
  3. Rawlings, Diane C.; Christensen, Stephen. Amorphous metal riblets. USP2014038678316.
  4. Stiles Ian J.. Apparatus and method for redundant write removal. USP1998075781733.
  5. Ragg, Peter; Stadler, Michael. Axial or diagonal fan with trip edge on the rotor blade. USP2017109803649.
  6. Rawlings, Diane C.. Color applications for aerodynamic microstructures. USP2017079714083.
  7. Thombi Layukallo JP. Control of flow separation and related phenomena on aerodynamic surfaces. USP2002116484971.
  8. May, Carol L.; Voropayev, Gennadiy A.. Design of viscoelastic coatings to reduce turbulent friction drag. USP201006RE41398.
  9. May, Carol L.; Voropayev, Gennadiy A.. Design of viscoelastic coatings to reduce turbulent friction drag. USP2003026516652.
  10. Doucette, Luke D.; Tripp, Carl P.; Ninness, Brian J.. Detection system for airborne particles. USP2013028372183.
  11. Riggins, David W.. Drag reduction utilizing driven micro-cavities. USP2016049308987.
  12. McKeon, Beverley J.; Yu, Christopher. Dynamic roughness for aerodynamic applications. USP2012118302904.
  13. Gustafson,Thomas J.; Chinoda,Zvirimumwoyo P.; Hilgefort,Kurt A.; Meyer,Terrence J.; Reck,Carl L.. Fan blade with ridges. USP2009027494325.
  14. Eroglu Adnan,CHX ; Joos Franz,DEX ; Paikert Bettina,CHX ; Paschereit Cristian Oliver,CHX ; Keller Jakob J.,CHX. Flow duct with cross-sectional step. USP2001046216644.
  15. Van Merksteijn, Jacobus Lambertus. Friction resistance reducing layer. USP2013098535781.
  16. Conners, Timothy R.; Henne, Preston A.; Howe, Donald C.. Isentropic compression inlet for supersonic aircraft. USP2016119482155.
  17. Conners, Timothy R.; Howe, Donald C.; Henne, Preston A.. Isentropic compression inlet for supersonic aircraft. USP2012128333076.
  18. Henne, Preston A.; Conners, Timothy R.; Howe, Donald C.. Isentropic compression inlet for supersonic aircraft. USP2012128327645.
  19. Henne, Preston A.; Conners, Timothy R.; Howe, Donald C.. Isentropic compression inlet for supersonic aircraft. USP2012108286434.
  20. Conners, Timothy R.. Low shock strength inlet. USP2013038393158.
  21. Conners, Timothy R.. Low shock strength inlet. USP2015059027583.
  22. Conners, Timothy R.. Low shock strength propulsion system. USP2014068739514.
  23. Conners, Timothy R.. Low shock strength propulsion system. USP2014078783039.
  24. Li, Ming; Marinelli, James M.; Liu, Jiantao; Magnusen, Paul E.; Sheu, Simon; Heinimann, Markus B.; Liu, John; Vega, Luis Fanor. Metal sheets and plates having friction-reducing textured surfaces and methods of manufacturing same. USP2013118578747.
  25. Li, Ming; Marinelli, James M.; Liu, Jiantao; Magnusen, Paul E.; Sheu, Simon; Heinimann, Markus B.; Liu, John; Vega, Luis Fanor. Metal sheets and plates having friction-reducing textured surfaces and methods of manufacturing same. USP2013058444092.
  26. Miller, Daniel N.; McCallum, Brent N.; Jenkins, Stewart A.; Wells, David M.. Method and system for global flow field management using distributed, surface-embedded, nano-scale boundary layer actuation. USP2012088240616.
  27. Segota,Darko; Finnegan, II,John W.. Method and system for regulating external fluid flow over an object's surface, and particularly a wing and diffuser. USP2009017475853.
  28. Segota,Darko; Finnegan, II,John W.. Method and system for regulating fluid flow over an airfoil or a hydrofoil. USP2006057048505.
  29. Segota,Darko; Finnegan, II,John W.. Method and system for regulating fluid over an airfoil or a hydrofoil. USP2007107278825.
  30. Segota,Darko; Finnegan, II,John W.. Method and system for regulating internal fluid flow within an enclosed or semi-enclosed environment. USP2007117296411.
  31. Whitmore, Stephen A.; Saltzman, Edwin J.; Moes, Timothy R.; Iliff, Kenneth W.. Method for reducing the drag of blunt-based vehicles by adaptively increasing forebody roughness. USP2005056892989.
  32. Rawlings, Diane C.; Keough, Bruce K.; Olli, Larry K.; Burg, Alan G.; Kestner, James M.; Granger, George Michael; McGarvey, James Charles. Multilayer riblet applique and methods of producing the same. USP20181010105877.
  33. Rawlings, Diane C.; Williams, Timothy Leroy; McGarvey, James C.; Kestner, James M.; Burg, Alan G.. Optical effects for aerodynamic microstructures. USP2017099751618.
  34. Richard Heinen BE. Pneumatic tire tread having groove with peaks and valleys. USP2002076415835.
  35. Rawlings, Diane C.; Roe, George M.; Keller, Peter C.. Reduced solar absorptivity applique. USP2014058733702.
  36. Rawlings, Diane C.; Malone, Kevin R.. Rigid tipped riblets. USP2014048684310.
  37. Rawlings, Diane C.; Schneider, Terry L.. Shape memory riblets. USP2014038668166.
  38. Mbamalu, Othniel. Space vehicle system. USP20180710023329.
  39. Paszkowski,Mariusz. Superhydrophobic coating. USP2006026994045.
  40. Henne, Preston A.; Conners, Timothy R.; Howe, Donald C.. Supersonic aircraft jet engine installation. USP2016059334801.
  41. Henne, Preston A.; Howe, Donald C.; Wolz, Robert R.; Hancock, Jr., Jimmy L.. Supersonic aircraft with spike for controlling and reducing sonic boom. USP2004036698684.
  42. Henne, Preston A.; Howe, Donald C.; Wolz, Robert R.; Hancock, Jr., Jimmy L.. Supersonic aircraft with spike for controlling and reducing sonic boom. USP2014078789789.
  43. Truax, Philip P.; Miller, Daniel N.; Hamstra, Jeffrey W.; Yagle, Patrick J.. System and method for actively manipulating and controlling fluid flow over a surface. USP2004016682021.
  44. Philip P. Truax ; Daniel N. Miller ; Jeffrey W. Hamstra ; Patrick J. Yagle. System and method for manipulating and controlling fluid flow over a surface. USP2002046371414.

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