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특허 상세정보

Control of laminar flow in fluids by means of acoustic energy

특허상세정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) B64C-023/00   
미국특허분류(USC) 244/200 ; 244/204 ; 244/130
출원번호 US-0918229 (1986-10-14)
발명자 / 주소
출원인 / 주소
인용정보 피인용 횟수 : 51  인용 특허 : 2
초록

Retarding of the point of transition from laminar flow to turbulent flow in aerodynamic boundary layers on the surfaces of aircraft is accomplished by radiating acoustic energy at frequencies greater than twice the critical Tollmein-Schlichting frequency into the boundary layer. The acoustic energy interferes with the formation of Tollmein-Schlichting waves, thereby increasing the incidence of laminar flow and reducing aerodynamic drag.

대표
청구항

A method for retarding the onset of turbulent boundary layer flow around an airfoil moving with respect to an air mass through the infusion of acoustic energy into the boundary layer comprising the steps of: (a) electronically generating acoustic energy at or near the surface of an airfoil moving through an air mass and having a laminar flow boundary layer over at least a portion of said surface of said airfoil, (b) providing a plurality of predetermined acoustic energy emitting locations upon said airflow surface over which said boundary layer flow is l...

이 특허를 인용한 특허 피인용횟수: 51

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  25. Glezer Ari ; Smith Barton L. ; Trautman Mark A.. Modifications of fluid flow about bodies and surfaces with synthetic jet actuators. USP1999095957413.
  26. Hassan Ahmed A. ; Straub Friedrich K. ; Domzalski David B.. Oscillating air jets for helicopter rotor aerodynamic control and BVI noise reduction. USP2000076092990.
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  28. Hassan Ahmed A. ; Tadghighi Hormoz ; Janakiram Ram D.. Oscillating air jets for reducing HSI noise. USP2001056234751.
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  30. Tiwari, Sean; Weaver, Luby. Perforated surface for suction-type laminar flow control. USP20180610000277.
  31. Hwang Danny P.. Skin friction reduction by micro-blowing technique. USP1998095803410.
  32. Baruzzini, Dan J.; Miller, Daniel N.; Domel, Neal D.; Hakes, Jeff G.. Suprression of shock-induced airflow separation. USP20180810054048.
  33. Malmuth, Norman D.; Fedorov, Alexander; Shalaev, Vladimir; Zharov, Vladimir; Shalaev, Ivan; Maslov, Anatoly; Soloviev, Victor. Surface plasma discharge for controlling forebody vortex asymmetry. USP2004096796532.
  34. Glezer Ari ; Allen Mark G. ; Coe David J. ; Smith Barton L. ; Trautman Mark A. ; Wiltse John W.. Synthetic jet actuator and applications thereof. USP1998065758823.
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  36. Glezer Ari ; Allen Mark G.. Synthetic jet actuators for cooling heated bodies and environments. USP2000096123145.
  37. Glezer Ari ; Wiltse John W.. Synthetic jet actuators for mixing applications. USP2000056056204.
  38. Glezer, Ari; Mahalingam, Raghavendran; Heffington, Samuel. Synthetic jet heat pipe thermal management system. USP2009107607470.
  39. Silkey, Joseph S.; Smereczniak, Philip. Systems and methods for controlling flows with pulsed discharges. USP2014058727286.
  40. Bonutti, Peter M.. Systems for modifying a fluid flow of a vehicle. USP2017029581179.
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  43. Mahalingam, Raghavendran; Glezer, Ari. Thermal management of batteries using synthetic jets. USP2011108030886.
  44. Bonutti,Peter M.. Traction control system. USP2007067234730.
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  51. Kruckenberg, Teresa M.; Pujar, Vijay V.; Braden, Robert L.. Virtual aerodynamic surface systems. USP2018069994301.