GB1532815A - Rotor blades for ducted fans - Google Patents

Rotor blades for ducted fans

Info

Publication number
GB1532815A
GB1532815A GB40244/75A GB4024475A GB1532815A GB 1532815 A GB1532815 A GB 1532815A GB 40244/75 A GB40244/75 A GB 40244/75A GB 4024475 A GB4024475 A GB 4024475A GB 1532815 A GB1532815 A GB 1532815A
Authority
GB
United Kingdom
Prior art keywords
rotor blades
pores
aperture
ducted fan
inner region
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
GB40244/75A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rolls Royce PLC
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
Application filed by Rolls Royce PLC filed Critical Rolls Royce PLC
Priority to GB40244/75A priority Critical patent/GB1532815A/en
Publication of GB1532815A publication Critical patent/GB1532815A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/12—Blades
    • F01D5/14—Form or construction
    • F01D5/141—Shape, i.e. outer, aerodynamic form
    • 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
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/68—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers
    • F04D29/681—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers especially adapted for elastic fluid pumps
    • F04D29/682—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers especially adapted for elastic fluid pumps by fluid extraction
    • 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
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/68—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers
    • F04D29/681—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers especially adapted for elastic fluid pumps
    • F04D29/684—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers especially adapted for elastic fluid pumps by fluid injection
    • 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
    • Y02T50/60—Efficient propulsion technologies, e.g. for aircraft

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)

Abstract

1532815 Reducing ducted fan noise ROLLS-ROYCE Ltd 27 Sept 1976 [2 Oct 1975] 40244/75 Headings F1C and F1J [Also in Division F2] To reduce noise produced by wake interaction the rotor blades 10, e.g. of a gas turbine ducted fan, each have pores or an aperture 16 at a radially inner region 20 through which boundary layer fluid is drawn centrifugally into radial passage 24 for discharge through aperture 22 at a radially outer region. The blade 10 may have a titanium skin surrounding honeycomb core 28 and partition 26, or alternatively may be of fibre reinforced metal or plastics. The pores at inner region 20 may be formed in a sintered metallic panel.
GB40244/75A 1976-09-27 1976-09-27 Rotor blades for ducted fans Expired GB1532815A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB40244/75A GB1532815A (en) 1976-09-27 1976-09-27 Rotor blades for ducted fans

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB40244/75A GB1532815A (en) 1976-09-27 1976-09-27 Rotor blades for ducted fans

Publications (1)

Publication Number Publication Date
GB1532815A true GB1532815A (en) 1978-11-22

Family

ID=10413938

Family Applications (1)

Application Number Title Priority Date Filing Date
GB40244/75A Expired GB1532815A (en) 1976-09-27 1976-09-27 Rotor blades for ducted fans

Country Status (1)

Country Link
GB (1) GB1532815A (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2682515A1 (en) * 1987-02-25 1993-04-16 Onera (Off Nat Aerospatiale) Method for reducing the noise of a ship, and ship equipped with corresponding devices
US5480284A (en) * 1993-12-20 1996-01-02 General Electric Company Self bleeding rotor blade
WO2001055559A1 (en) * 2000-01-27 2001-08-02 Siemens Aktiengesellschaft Porous turbine blades and turbine equipped with blades of this type
JP2002538379A (en) * 1999-02-25 2002-11-12 ユナイテッド テクノロジーズ コーポレイション Centrifugal air flow control device
WO2007035758A1 (en) * 2005-09-19 2007-03-29 University Of Florida Research Foundation, Inc. Wind turbine blade comprising a boundary layer control system
WO2007036203A1 (en) * 2005-09-30 2007-04-05 Mtu Aero Engines Gmbh Moving blade for an axial turbomachine
US7320575B2 (en) 2004-09-28 2008-01-22 General Electric Company Methods and apparatus for aerodynamically self-enhancing rotor blades
FR2927674A1 (en) * 2008-02-14 2009-08-21 Snecma Sa Fan blade for turbine engine of airplane, has two vents exclusively transporting less percentages of air, which enters into turbine engine along main axis and runs along blade during normal operation, from inlet orifices to outlet orifices
EP1878872A3 (en) * 2006-07-11 2012-10-17 General Electric Company Turbofan engine and its blades
CN114348241A (en) * 2020-10-14 2022-04-15 保时捷股份公司 Ducted propeller of aircraft, aircraft and component of aircraft
US11827344B2 (en) 2020-12-09 2023-11-28 Textron Innovations Inc. Low noise ducted fan

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2682515A1 (en) * 1987-02-25 1993-04-16 Onera (Off Nat Aerospatiale) Method for reducing the noise of a ship, and ship equipped with corresponding devices
US5480284A (en) * 1993-12-20 1996-01-02 General Electric Company Self bleeding rotor blade
JP4694696B2 (en) * 1999-02-25 2011-06-08 ユナイテッド テクノロジーズ コーポレイション Centrifugal air flow control device
JP2002538379A (en) * 1999-02-25 2002-11-12 ユナイテッド テクノロジーズ コーポレイション Centrifugal air flow control device
JP2011102588A (en) * 1999-02-25 2011-05-26 United Technologies Corp <Utc> Centrifugal air flow control unit
WO2001055559A1 (en) * 2000-01-27 2001-08-02 Siemens Aktiengesellschaft Porous turbine blades and turbine equipped with blades of this type
US7320575B2 (en) 2004-09-28 2008-01-22 General Electric Company Methods and apparatus for aerodynamically self-enhancing rotor blades
WO2007035758A1 (en) * 2005-09-19 2007-03-29 University Of Florida Research Foundation, Inc. Wind turbine blade comprising a boundary layer control system
WO2007036203A1 (en) * 2005-09-30 2007-04-05 Mtu Aero Engines Gmbh Moving blade for an axial turbomachine
EP1878872A3 (en) * 2006-07-11 2012-10-17 General Electric Company Turbofan engine and its blades
EP1878872B1 (en) 2006-07-11 2016-07-13 General Electric Company Turbofan engine and fan blades
FR2927674A1 (en) * 2008-02-14 2009-08-21 Snecma Sa Fan blade for turbine engine of airplane, has two vents exclusively transporting less percentages of air, which enters into turbine engine along main axis and runs along blade during normal operation, from inlet orifices to outlet orifices
CN114348241A (en) * 2020-10-14 2022-04-15 保时捷股份公司 Ducted propeller of aircraft, aircraft and component of aircraft
CN114348241B (en) * 2020-10-14 2023-11-14 保时捷股份公司 Ducted propeller of aircraft, aircraft and component of aircraft
US11827344B2 (en) 2020-12-09 2023-11-28 Textron Innovations Inc. Low noise ducted fan

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee