GB1262494A - Axial flow fans arranged for attenuating fan noise - Google Patents

Axial flow fans arranged for attenuating fan noise

Info

Publication number
GB1262494A
GB1262494A GB29806/69A GB2980669A GB1262494A GB 1262494 A GB1262494 A GB 1262494A GB 29806/69 A GB29806/69 A GB 29806/69A GB 2980669 A GB2980669 A GB 2980669A GB 1262494 A GB1262494 A GB 1262494A
Authority
GB
United Kingdom
Prior art keywords
rotor blades
guide vanes
flow fans
axial flow
fan noise
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
GB29806/69A
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.)
Raytheon Technologies Corp
Original Assignee
United Aircraft Corp
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 United Aircraft Corp filed Critical United Aircraft Corp
Publication of GB1262494A publication Critical patent/GB1262494A/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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/52—Casings; Connections of working fluid for axial pumps
    • F04D29/522—Casings; Connections of working fluid for axial pumps especially adapted for elastic fluid pumps
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S415/00—Rotary kinetic fluid motors or pumps
    • Y10S415/913—Inlet and outlet with concentric portions

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

1,262,494. Axial-flow fans. UNITED AIRCRAFT CORP. June 12, 1969 [June 13, 1968], No.29806/69. Heading F1C. To reduce the noise created in an axial-flow fan, the inlet and outlet guide vanes 14, 18 thereof are spaced from the rotor blades 16 by a distance at least equal to the height S of the rotor blades, and the inlet passage turns through substantially 180 degrees and has at least one area change which may be gradual or of step-form to produce an increase or a decrease in the passage area in the direction of flow. Morover, the number of guide vanes 14 and the number of guide vanes 18 is preferably greater than the number of rotor blades 16. Equations for determining a suitable ratio of guide vanes to rotor blades, and the degree of noise attenuation produced by the area change, are given in the Specification.
GB29806/69A 1968-06-13 1969-06-12 Axial flow fans arranged for attenuating fan noise Expired GB1262494A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US73662468A 1968-06-13 1968-06-13

Publications (1)

Publication Number Publication Date
GB1262494A true GB1262494A (en) 1972-02-02

Family

ID=24960605

Family Applications (1)

Application Number Title Priority Date Filing Date
GB29806/69A Expired GB1262494A (en) 1968-06-13 1969-06-12 Axial flow fans arranged for attenuating fan noise

Country Status (3)

Country Link
US (1) US3471080A (en)
FR (1) FR2010799A1 (en)
GB (1) GB1262494A (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1305302A (en) * 1970-04-28 1973-01-31
US3961866A (en) * 1974-08-14 1976-06-08 Sperry Rand Corporation Geothermal energy system heat exchanger and control apparatus
US4398096A (en) * 1981-07-20 1983-08-09 Einar Faurholtz Aero electro turbine
DE4328186C2 (en) * 1992-10-26 2002-05-16 Alstom Flow divider for radial-axial inlet housing
US5484259A (en) * 1994-06-13 1996-01-16 Emerson Electric Co. Low noise centrifugal blower
JP4791691B2 (en) 2001-06-06 2011-10-12 ハウデン・パワー・アクティーゼルスカブ Gas outlet unit for large blower assembly
US6789998B2 (en) * 2002-09-06 2004-09-14 Honeywell International Inc. Aperiodic struts for enhanced blade responses
ITGE20110036A1 (en) * 2011-04-05 2012-10-06 Enrico Bruno Brizzolara INTUBATED NAVAL PROPELLER
NL2008662C2 (en) 2012-04-19 2013-10-23 Univ Leiden Electroextraction.
US20220194600A1 (en) * 2020-12-18 2022-06-23 Hamilton Sundstrand Corporation Ram exhaust module

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2735612A (en) * 1956-02-21 hausmann
BE545474A (en) *
CH52778A (en) * 1910-07-28 1912-01-02 Oerlikon Maschf Axial impeller with downstream diffuser for conveying liquid or gaseous fluid
US1693352A (en) * 1922-12-06 1928-11-27 Westinghouse Electric & Mfg Co Dredger pump
GB226203A (en) * 1923-12-10 1925-07-23 Oerlikon Maschf Improvements in stators and rotors for turbines
US1585218A (en) * 1924-03-26 1926-05-18 Watanabe Gennojo Soundless double propeller for aeroplanes
GB368160A (en) * 1930-07-30 1932-03-03 Sulzer Ag Improvements in or relating to axial flow pumps
US2191341A (en) * 1937-02-26 1940-02-20 Jeffrey Mfg Co Ventilator
US2339602A (en) * 1942-01-26 1944-01-18 B F Sturtevant Co Multistage propeller fan
US2918254A (en) * 1954-05-10 1959-12-22 Hausammann Werner Turborunner
GB856722A (en) * 1957-01-30 1960-12-21 Parsons C A & Co Ltd Improvements in and relating to gas circulatory means
US3194487A (en) * 1963-06-04 1965-07-13 United Aircraft Corp Noise abatement method and apparatus

Also Published As

Publication number Publication date
FR2010799A1 (en) 1970-02-20
US3471080A (en) 1969-10-07

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