GB933222A - Improvements relating to axial-flow blowers - Google Patents

Improvements relating to axial-flow blowers

Info

Publication number
GB933222A
GB933222A GB26284/59A GB2628459A GB933222A GB 933222 A GB933222 A GB 933222A GB 26284/59 A GB26284/59 A GB 26284/59A GB 2628459 A GB2628459 A GB 2628459A GB 933222 A GB933222 A GB 933222A
Authority
GB
United Kingdom
Prior art keywords
air
blade
jet
blades
rotor
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
GB26284/59A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB933222A publication Critical patent/GB933222A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B39/00—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude
    • B63B39/06—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude to decrease vessel movements by using foils acting on ambient water
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C21/00—Influencing air flow over aircraft surfaces by affecting boundary layer flow
    • B64C21/02—Influencing air flow over aircraft surfaces by affecting boundary layer flow by use of slot, ducts, porous areas or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C21/00—Influencing air flow over aircraft surfaces by affecting boundary layer flow
    • B64C21/02—Influencing air flow over aircraft surfaces by affecting boundary layer flow by use of slot, ducts, porous areas or the like
    • B64C21/04—Influencing air flow over aircraft surfaces by affecting boundary layer flow by use of slot, ducts, porous areas or the like for blowing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C9/00—Adjustable control surfaces or members, e.g. rudders
    • B64C9/38—Jet flaps
    • 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
    • F01D5/148—Blades with variable camber, e.g. by ejection of fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
    • F04D25/088—Ceiling fans
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C2230/00—Boundary layer controls
    • B64C2230/04—Boundary layer controls by actively generating fluid flow
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C2230/00—Boundary layer controls
    • B64C2230/16—Boundary layer controls by blowing other fluids over the surface than air, e.g. He, H, O2 or exhaust gases
    • 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
    • F05D2240/00—Components
    • F05D2240/20—Rotors
    • F05D2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
    • F05D2240/304—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor related to the trailing edge of a rotor blade
    • 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
    • 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
    • Y02T50/30—Wing lift efficiency
    • 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)
  • Aviation & Aerospace Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

933,222. Turbines; axial-flow blowers. N. LAING. July 31, 1959 [Aug. 1, 1958], No. 26284/59. Classes 110 (1) and 110 (3). [Also in Group XXXIII] An axial-flow blower comprises a rotor mounted for free rotation and having at least one blade, openings in the trailing portions of each blade for the ejection of air from the blade to produce a " jet flap " effect and also to drive the rotor by reaction, and an auxiliary blower disposed in the rotor to supply air to each blade under pressure. The " jet flap " effect is that already proposed for use in aircraft, wherein air is ejected from a slot at the trailing edge of an aerofoil to form an air jet having the effect of a flap but with greatly reduced losses. The air jet increases the lift of the aerofoil and reduces flow separation on the suction side of the aerofoil. Figs. 1 and 2 show a ceiling fan rotor 9 comprising a pair of blades 10 carried by a hub 11 supported by ball-bearings 12 for free rotation about a housing 1. A double-entry centrifugal impeller 8, driven by an electric motor 2 and supported by ball-bearings 4, draws in air through a port 16 in the trailing edge of each blade tip, via a channel 14 in each blade and a central space 17 in the hub 9. In addition, some air is drawn into the central space 17 through holes in the wall of the housing 1, as shown by arrow 17a, passing over the motor 2 to cool it. The impeller 8 discharges through channels 15 in the blades to slots 19 formed along the trailing edges of the blades, the slots 19 being directed for ejection of air rearwardly and slightly downwardly with respect to the blade chord, to cause rotation of the rotor 9 by jet reaction and to produce a " jet flap " effect which improves the circulation around each blade and hence the lift. The removal of air from the blade tips through the ports 16 reduces eddying at the tips and consequent noise. Further noise-suppression is effected by soundabsorbing means 21, 22 in the channels 14, 15. Fig. 4 shows a ceiling fan rotor 40 supported for free rotation on a post 41 and comprising a single hollow blade 42 counterbalanced by a blower 43 and its driving motor 44. The blower draws in air at 46 and discharges it through a slot 47 along the trailing edge of the blade. The slot 47 is so constructed that more air is discharged through its outer part 49 than through its inner part 51. The major part of the reactive thrust is associated with the outer part 49 where, moreover, the moment arm is longer; while the " jet flap " effect has its major influence at the inner part 51, where breakaway of flow is more likely. In a further embodiment, a two-bladed fan used in a cooling tower is supplied with air for propulsion and " jet flap " effect by an electrically-driven axial-flow blower projecting within the fan hub. The guide blades of the blower are supported by and within the fan hub. The major part of the air leaves the fan blades at their outer region, at only a slight angle to the plane of rotation, to produce a strong reactive drive, while a minor part leaves the blades at their inner region, at an angle to the plane of rotation which increases towards the fan hub for the purpose of preventing breakaway of flow at the inner region.
GB26284/59A 1958-08-01 1959-07-31 Improvements relating to axial-flow blowers Expired GB933222A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEL30964A DE1198145B (en) 1958-08-01 1958-08-01 Flow bodies, in particular transverse drive surfaces, with circulation that can be influenced by blowing out flow medium jets

Publications (1)

Publication Number Publication Date
GB933222A true GB933222A (en) 1963-08-08

Family

ID=7265399

Family Applications (3)

Application Number Title Priority Date Filing Date
GB26284/59A Expired GB933222A (en) 1958-08-01 1959-07-31 Improvements relating to axial-flow blowers
GB13686/63A Expired GB934141A (en) 1958-08-01 1959-07-31 Improvements relating to flow machines
GB13685/63A Expired GB933223A (en) 1958-08-01 1959-07-31 Improvements relating to arrangements to guide flow of a fluid medium

Family Applications After (2)

Application Number Title Priority Date Filing Date
GB13686/63A Expired GB934141A (en) 1958-08-01 1959-07-31 Improvements relating to flow machines
GB13685/63A Expired GB933223A (en) 1958-08-01 1959-07-31 Improvements relating to arrangements to guide flow of a fluid medium

Country Status (3)

Country Link
BE (1) BE581306A (en)
DE (1) DE1198145B (en)
GB (3) GB933222A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3749379A (en) * 1971-04-07 1973-07-31 Gen Electric System for thermal exhaust
US20150308438A1 (en) * 2014-04-23 2015-10-29 Electric Torque Machines, Inc. Self-Cooling Fan Assembly

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3934410A (en) * 1972-09-15 1976-01-27 The United States Of America As Represented By The Secretary Of The Navy Quiet shrouded circulation control propeller
US5464321A (en) * 1978-11-24 1995-11-07 The United States Of America As Represented By The Secretary Of The Navy Marine propeller
EP0201770B1 (en) * 1985-04-24 1992-07-01 Pratt & Whitney Canada, Inc. Turbine engine with induced pre-swirl at the compressor inlet
DE3534169A1 (en) * 1985-09-25 1987-03-26 Wolfgang Loesel Circulation stimulation for lift profiles for increasing lift and reducing resistance
JP2630701B2 (en) * 1991-10-21 1997-07-16 陸郎 野津 Turbine rotor blades for symmetric blade turbines
DE4332358C2 (en) * 1993-09-23 1997-03-06 Nissen Jens Peter Dipl Ing Method and device for converting the drive energies of watercraft into speed more effectively
DE102004043949B4 (en) * 2004-09-11 2008-05-29 Incoe International, Inc. Device for the selective distribution of a non-Newtonian liquid flowing through a channel, such as a plastic melt
FR2883604B1 (en) * 2005-03-23 2010-03-12 Snecma Moteurs DEVIATION SYSTEM FOR A GAS FLOW IN A TUYERE
JP4976728B2 (en) * 2006-03-07 2012-07-18 インコー コーポレイション Device for splitting non-Newtonian liquid flowing through a passage
SG135987A1 (en) * 2006-03-09 2007-10-29 Incoe Corp Device for division of a non-newtonian liquid flowing through a passage
FR2898392B1 (en) * 2006-03-10 2010-09-17 Incoe Corp TARGET DIVISION DEVICE FOR NON-NEWTONIAN FLUID FLOWING BY PASSING
CN113428311B (en) * 2021-07-16 2022-07-26 中国船舶重工集团公司第七0七研究所九江分部 Fluid momentum loop based on shaftless rim drive pump drive

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE586010C (en) * 1933-10-14 Siemens Schuckertwerke Akt Ges Fan
US2037942A (en) * 1935-10-28 1936-04-21 Edward A Stalker Means of reducing the fluid resistance of propelled vehicles
DE767546C (en) * 1938-09-12 1952-11-04 Bmw Flugmotorenbau G M B H Internally cooled turbine blade
FR971992A (en) * 1940-12-07 1951-01-24 Jet-propelled aerial vehicles improvements
GB578837A (en) * 1941-10-14 1946-07-15 Boulton Aircraft Ltd Improvements in and relating to aircraft
US2568812A (en) * 1945-10-27 1951-09-25 United Aircraft Corp Aircraft control means
FR1006146A (en) * 1947-11-21 1952-04-21 Snecma Aerodynamic valve
US2694898A (en) * 1948-08-09 1954-11-23 France Etat Device for deflecting a high-speed jet of gas ejected through a nozzle
DE1013174B (en) * 1953-08-12 1957-08-01 Power Jets Res & Dev Ltd Aircraft with lift control devices, e.g. Flaps, on the wing trailing edges
DE952395C (en) * 1953-08-18 1956-11-15 Eugen Wilhelm Huber Dr Ing Device for influencing the boundary layer in intake pipes
FR1103426A (en) * 1954-02-26 1955-11-03 Onera (Off Nat Aerospatiale) Improvements made to aerodyne wings
FR1139802A (en) * 1955-11-29 1957-07-05 Improvement to pipes or channels traversed by fluids

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3749379A (en) * 1971-04-07 1973-07-31 Gen Electric System for thermal exhaust
US20150308438A1 (en) * 2014-04-23 2015-10-29 Electric Torque Machines, Inc. Self-Cooling Fan Assembly
US9360020B2 (en) 2014-04-23 2016-06-07 Electric Torque Machines Inc Self-cooling fan assembly

Also Published As

Publication number Publication date
BE581306A (en) 1959-12-01
GB933223A (en) 1963-08-08
GB934141A (en) 1963-08-14
DE1198145B (en) 1965-08-05

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