GB907851A - Improvements in the stabilisation of structures liable to excitation by ambient fluid flow - Google Patents

Improvements in the stabilisation of structures liable to excitation by ambient fluid flow

Info

Publication number
GB907851A
GB907851A GB3734457A GB3734457A GB907851A GB 907851 A GB907851 A GB 907851A GB 3734457 A GB3734457 A GB 3734457A GB 3734457 A GB3734457 A GB 3734457A GB 907851 A GB907851 A GB 907851A
Authority
GB
United Kingdom
Prior art keywords
stack
height
reduced
nov
provision
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
GB3734457A
Inventor
Christopher Scruton
Denis Eugene Joseph Walshe
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.)
National Research Development Corp UK
Original Assignee
National Research Development Corp UK
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 National Research Development Corp UK filed Critical National Research Development Corp UK
Priority to GB3734457A priority Critical patent/GB907851A/en
Priority to DE19581409401 priority patent/DE1409401A1/en
Publication of GB907851A publication Critical patent/GB907851A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
    • 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
    • B63B39/005—Equipment to decrease ship's vibrations produced externally to the ship, e.g. wave-induced vibrations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H21/00—Use of propulsion power plant or units on vessels
    • B63H21/32—Arrangements of propulsion power-unit exhaust uptakes; Funnels peculiar to vessels
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
    • E04H12/28—Chimney stacks, e.g. free-standing, or similar ducts

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Bridges Or Land Bridges (AREA)
  • Road Paving Structures (AREA)
  • Earth Drilling (AREA)
  • Vibration Prevention Devices (AREA)

Abstract

907,851. Chimneys. NATIONAL RESEARCH DEVELOPMENT CORPORATION. Nov. 19, 1958 [Nov. 29, 1957], No. 37344/57. Drawings to Specification. Class 25. [Also in Group XXXIII] The wind-excited oscillations of a chimney stack are reduced or eliminated by the provision on the external surface of the stack of a fixed stake or rib extending helically for a significant part of the height of stack, the pitch, radial height, longitudinal extent, and number, of stakes being such that the formation of regular vortex streets downstream of the stack is reduced to negligible proportions or eliminated. The stake may extend over the upper one third to two thirds of the height of the stack. In the case of a wind tunnel test body of constant circular section, oscillation in the plane perpendicular to the direction of air flow is significantly reduced by the provision of three equally spaced helical strakes, of radial height between one fifth and one fiftieth of the diameter of the body, the helix pitch being about fifteen diameters, or seven and a half diameters. In the case of a conical body, there may be a constant ratio between the helix pitch and body diameter at any station.
GB3734457A 1957-11-29 1957-11-29 Improvements in the stabilisation of structures liable to excitation by ambient fluid flow Expired GB907851A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB3734457A GB907851A (en) 1957-11-29 1957-11-29 Improvements in the stabilisation of structures liable to excitation by ambient fluid flow
DE19581409401 DE1409401A1 (en) 1957-11-29 1958-11-18 Method and device for stabilizing steep, elongated bodies

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3734457A GB907851A (en) 1957-11-29 1957-11-29 Improvements in the stabilisation of structures liable to excitation by ambient fluid flow

Publications (1)

Publication Number Publication Date
GB907851A true GB907851A (en) 1962-10-10

Family

ID=10395737

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3734457A Expired GB907851A (en) 1957-11-29 1957-11-29 Improvements in the stabilisation of structures liable to excitation by ambient fluid flow

Country Status (2)

Country Link
DE (1) DE1409401A1 (en)
GB (1) GB907851A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2162610A (en) * 1984-08-02 1986-02-05 Thomas Henderson Regulation of response of bodies to a fluid flow
EP3085956A1 (en) 2015-04-21 2016-10-26 Nordex Energy GmbH Tower for a wind turbine and method of erecting a wind energy tower
EP3604715A1 (en) 2018-08-03 2020-02-05 Nordex Energy GmbH Strand for scruton spiral, method for assembling a scruton spiral and method for erecting a wind power plant

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2162610A (en) * 1984-08-02 1986-02-05 Thomas Henderson Regulation of response of bodies to a fluid flow
EP3085956A1 (en) 2015-04-21 2016-10-26 Nordex Energy GmbH Tower for a wind turbine and method of erecting a wind energy tower
EP3604715A1 (en) 2018-08-03 2020-02-05 Nordex Energy GmbH Strand for scruton spiral, method for assembling a scruton spiral and method for erecting a wind power plant
DE102018118965A1 (en) * 2018-08-03 2020-02-06 Nordex Energy Gmbh Strand for a Scruton spiral, method for assembling a Scruton spiral, and method for installing a wind turbine

Also Published As

Publication number Publication date
DE1409401A1 (en) 1968-10-10

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