WO2010127986A3 - A flow control arrangement - Google Patents

A flow control arrangement Download PDF

Info

Publication number
WO2010127986A3
WO2010127986A3 PCT/EP2010/055784 EP2010055784W WO2010127986A3 WO 2010127986 A3 WO2010127986 A3 WO 2010127986A3 EP 2010055784 W EP2010055784 W EP 2010055784W WO 2010127986 A3 WO2010127986 A3 WO 2010127986A3
Authority
WO
WIPO (PCT)
Prior art keywords
edge
turbulence
noise
generated
static pressure
Prior art date
Application number
PCT/EP2010/055784
Other languages
French (fr)
Other versions
WO2010127986A2 (en
Inventor
Alastair Moore
Peter Schwaller
Francisco Franqueira-Valo
Christopher Bright
Original Assignee
Rolls-Royce Plc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from GB0907817A external-priority patent/GB0907817D0/en
Priority claimed from GB0907814A external-priority patent/GB0907814D0/en
Application filed by Rolls-Royce Plc filed Critical Rolls-Royce Plc
Publication of WO2010127986A2 publication Critical patent/WO2010127986A2/en
Publication of WO2010127986A3 publication Critical patent/WO2010127986A3/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
    • F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
    • F02C7/04—Air intakes for gas-turbine plants or jet-propulsion plants
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C23/00—Influencing air flow over aircraft surfaces, not otherwise provided for
    • B64C23/005—Influencing air flow over aircraft surfaces, not otherwise provided for by other means not covered by groups B64C23/02 - B64C23/08, e.g. by electric charges, magnetic panels, piezoelectric elements, static charges or ultrasounds
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/321—Rotors specially for elastic fluids for axial flow pumps for axial flow compressors
    • F04D29/324—Blades
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15D—FLUID DYNAMICS, i.e. METHODS OR MEANS FOR INFLUENCING THE FLOW OF GASES OR LIQUIDS
    • F15D1/00—Influencing flow of fluids
    • F15D1/10—Influencing flow of fluids around bodies of solid material
    • F15D1/12—Influencing flow of fluids around bodies of solid material by influencing the boundary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C2230/00—Boundary layer controls
    • B64C2230/14—Boundary layer controls achieving noise reductions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2270/00—Control
    • F05D2270/01—Purpose of the control system
    • F05D2270/17—Purpose of the control system to control boundary layer
    • F05D2270/172—Purpose of the control system to control boundary layer by a plasma generator, e.g. control of ignition
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/50—Intrinsic material properties or characteristics
    • F05D2300/507—Magnetic properties
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/30—Wind power
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T50/00—Aeronautics or air transport
    • Y02T50/10—Drag reduction

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Details Of Valves (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)

Abstract

Significant noise is generated when turbulence in a free stream encounters an edge such as a leading edge or trailing edge of an aerofoil. The turbulence in contact with the edge causes static pressure fluctuations which radiate the acoustic noise. By providing magnetic hand electric field actuators about the edge, a impeding force is generated to create a transition zone for the fluid flow reducing static pressure fluctuations and therefore noise radiation. The actuator may comprise permanent magnets or electromagnets (302a, 302b) whilst th flow (303) is ionised by appropriate ioniser mechanisms in order to facilitate creation of a impeding force through a Lorentz effect.
PCT/EP2010/055784 2009-05-08 2010-04-29 A flow control arrangement WO2010127986A2 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB0907817.1 2009-05-08
GB0907814.8 2009-05-08
GB0907817A GB0907817D0 (en) 2009-05-08 2009-05-08 A flow control arrangement
GB0907814A GB0907814D0 (en) 2009-05-08 2009-05-08 A flow control arrangement

Publications (2)

Publication Number Publication Date
WO2010127986A2 WO2010127986A2 (en) 2010-11-11
WO2010127986A3 true WO2010127986A3 (en) 2011-07-07

Family

ID=43050544

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2010/055784 WO2010127986A2 (en) 2009-05-08 2010-04-29 A flow control arrangement

Country Status (1)

Country Link
WO (1) WO2010127986A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019155130A1 (en) * 2018-02-08 2019-08-15 Buendia Jose Magnetic binomial of aircraft propellers and wings

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3392941A (en) * 1966-09-22 1968-07-16 Army Usa Magnetohydrodynamic rudder for reentry device
FR2091847A1 (en) * 1969-10-20 1971-01-21 Devlieger Maurice
US5359574A (en) * 1993-08-27 1994-10-25 The United States Of America As Represented By The Secretary Of The Navy Electromagnetically activated compliant wavy-wall
US5791275A (en) * 1996-06-14 1998-08-11 The United States Of America As Represented By The Secretary Of The Navy Surface layer comprising micro-fabricated tiles for electromagnetic control of fluid turbulence in sea water
US6220549B1 (en) * 1998-06-19 2001-04-24 General Atomics Method and apparatus for fabricating panels used for the active control of surface drag
EP1926353A1 (en) * 2006-11-22 2008-05-28 Lockheed Martin Corporation Over-wing travelling-wave axial flow plasma accelerator

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3392941A (en) * 1966-09-22 1968-07-16 Army Usa Magnetohydrodynamic rudder for reentry device
FR2091847A1 (en) * 1969-10-20 1971-01-21 Devlieger Maurice
US5359574A (en) * 1993-08-27 1994-10-25 The United States Of America As Represented By The Secretary Of The Navy Electromagnetically activated compliant wavy-wall
US5791275A (en) * 1996-06-14 1998-08-11 The United States Of America As Represented By The Secretary Of The Navy Surface layer comprising micro-fabricated tiles for electromagnetic control of fluid turbulence in sea water
US6220549B1 (en) * 1998-06-19 2001-04-24 General Atomics Method and apparatus for fabricating panels used for the active control of surface drag
EP1926353A1 (en) * 2006-11-22 2008-05-28 Lockheed Martin Corporation Over-wing travelling-wave axial flow plasma accelerator

Also Published As

Publication number Publication date
WO2010127986A2 (en) 2010-11-11

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