GB1436724A - Reducing sound generation in fluid-flow systems embodying foil structures - Google Patents

Reducing sound generation in fluid-flow systems embodying foil structures

Info

Publication number
GB1436724A
GB1436724A GB2724273A GB2724273A GB1436724A GB 1436724 A GB1436724 A GB 1436724A GB 2724273 A GB2724273 A GB 2724273A GB 2724273 A GB2724273 A GB 2724273A GB 1436724 A GB1436724 A GB 1436724A
Authority
GB
United Kingdom
Prior art keywords
fluid
foil
flow
sound generation
blade
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
GB2724273A
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.)
Bolt Beranek and Newman Inc
Original Assignee
Bolt Beranek and Newman Inc
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 Bolt Beranek and Newman Inc filed Critical Bolt Beranek and Newman Inc
Priority to GB2724273A priority Critical patent/GB1436724A/en
Publication of GB1436724A publication Critical patent/GB1436724A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • F01D5/147—Construction, i.e. structural features, e.g. of weight-saving hollow 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
    • F01D5/28—Selecting particular materials; Particular measures relating thereto; Measures against erosion or corrosion
    • 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)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Architecture (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

1436724 Propellers BOLT BERANEK & NEWMAN Inc 7 June 1973 27242/73 Heading B7V [Also in Divisions F1 and F2] In a foil for use in a fluid flow system such as a marine propeller blade or an airscrew blade in which fluid flows about the surface of the foil, the whole or portions of the surface of the foil are permeable to the fluid, the permeability being so selected with regard to the soundproducing fluid-flow forces generated by the interaction of the fluid-flow with the foil that such forces are substantially less than those which would be generated by the interaction of the same fluid flow with a foil of dimensionally identical section the entire surface of which is substantially impermeable to the fluid. In another aspect the foil is formed with a series of notches extending inwardly from the trailing edge of the foil the effect of the notches being such that sound-producing fluid-flow forces are substantially less than would be the case if the blade were un-notched.
GB2724273A 1973-06-07 1973-06-07 Reducing sound generation in fluid-flow systems embodying foil structures Expired GB1436724A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2724273A GB1436724A (en) 1973-06-07 1973-06-07 Reducing sound generation in fluid-flow systems embodying foil structures

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2724273A GB1436724A (en) 1973-06-07 1973-06-07 Reducing sound generation in fluid-flow systems embodying foil structures

Publications (1)

Publication Number Publication Date
GB1436724A true GB1436724A (en) 1976-05-26

Family

ID=10256414

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2724273A Expired GB1436724A (en) 1973-06-07 1973-06-07 Reducing sound generation in fluid-flow systems embodying foil structures

Country Status (1)

Country Link
GB (1) GB1436724A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2355288A (en) * 1999-10-12 2001-04-18 Rolls Royce Plc Gas turbine blade trailing edge
EP1239454A1 (en) * 2001-03-09 2002-09-11 Airbus France Method of manufacturing a panel with an adapted, acoustically resistive layer and resulting panel

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2355288A (en) * 1999-10-12 2001-04-18 Rolls Royce Plc Gas turbine blade trailing edge
US6358013B1 (en) 1999-10-12 2002-03-19 Rolls-Royce Plc Turbine blade and manufacture thereof
GB2355288B (en) * 1999-10-12 2003-10-01 Rolls Royce Plc Improved turbine blade and manufacture thereof
EP1239454A1 (en) * 2001-03-09 2002-09-11 Airbus France Method of manufacturing a panel with an adapted, acoustically resistive layer and resulting panel
FR2821788A1 (en) * 2001-03-09 2002-09-13 Eads Airbus Sa METHOD FOR MANUFACTURING A PANEL WITH AN ADAPTED ACOUSTIC RESISTIVE LAYER AND ACOUSTIC PANEL THUS OBTAINED
US6755280B2 (en) 2001-03-09 2004-06-29 Airbus France Method for producing a panel comprising an adapted acoustically resistive layer and panel so obtained

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Legal Events

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