GB382297A - Improvements in and relating to counter-running double or multiple propellers in media of all kinds - Google Patents

Improvements in and relating to counter-running double or multiple propellers in media of all kinds

Info

Publication number
GB382297A
GB382297A GB2086131A GB2086131A GB382297A GB 382297 A GB382297 A GB 382297A GB 2086131 A GB2086131 A GB 2086131A GB 2086131 A GB2086131 A GB 2086131A GB 382297 A GB382297 A GB 382297A
Authority
GB
United Kingdom
Prior art keywords
propellers
speed
local
admission
equivalent
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
GB2086131A
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
Priority to GB2086131A priority Critical patent/GB382297A/en
Publication of GB382297A publication Critical patent/GB382297A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H5/00—Arrangements on vessels of propulsion elements directly acting on water
    • B63H5/07—Arrangements on vessels of propulsion elements directly acting on water of propellers
    • B63H5/08—Arrangements on vessels of propulsion elements directly acting on water of propellers of more than one propeller
    • B63H5/10—Arrangements on vessels of propulsion elements directly acting on water of propellers of more than one propeller of coaxial type, e.g. of counter-rotative type

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

382,297. Screw propellers. MELCHER, F., 146, Gentzgasse, Vienna. July 21, 1931, No. 20861. [Class 114.] In oppositely running twin or multiple propellers a, b the local pitch angles of the pressure sides of the alternatively right- and left-hand propellers are chosen that they are greater by a constant angle of incidence than the corresponding angles which correspond to the tangent function of the ratio of the local speed of admission divided by the corresponding circumferential speed. The speed of admission of the element which is foremost in the direction of travel, is equivalent to the speed of the craft less the local wake and that if all the other successive elements is equivalent to the product of the effective outlet pitch by the number of revolutions per time unit of the adjacent front element. In setting out the propellers the relative entry and discharge speeds of the medium for both for and aft propellers is calculated point for point. After plotting the radius vectors of the relative entry and discharge speeds the pitches of the propeller can be calculated. The propellers are further characterized in that their clearance g is about 5 per cent of their diameter and the diameter of the rear propellers is diminished to conform to the contracted flow line conditioned by the forward propeller.
GB2086131A 1931-07-21 1931-07-21 Improvements in and relating to counter-running double or multiple propellers in media of all kinds Expired GB382297A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2086131A GB382297A (en) 1931-07-21 1931-07-21 Improvements in and relating to counter-running double or multiple propellers in media of all kinds

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2086131A GB382297A (en) 1931-07-21 1931-07-21 Improvements in and relating to counter-running double or multiple propellers in media of all kinds

Publications (1)

Publication Number Publication Date
GB382297A true GB382297A (en) 1932-10-21

Family

ID=10152981

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2086131A Expired GB382297A (en) 1931-07-21 1931-07-21 Improvements in and relating to counter-running double or multiple propellers in media of all kinds

Country Status (1)

Country Link
GB (1) GB382297A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2128688A (en) * 1982-10-20 1984-05-02 Mitsui Shipbuilding Eng Ship propeller
GB2211558A (en) * 1987-10-26 1989-07-05 Deutsche Forsch Luft Raumfahrt Bladed rotor
WO1996024727A1 (en) * 1995-02-07 1996-08-15 Hollandsche Beton Groep N.V. Device for creating a local water flow
NL9500228A (en) * 1995-02-07 1996-09-02 Hollandsche Betongroep Nv Arrangement for generating a local water flow
US5807151A (en) * 1995-10-18 1998-09-15 Sanshin Kogyo Kabushiki Kaisha Propeller for marine propulsion drive
GB2382382A (en) * 2001-11-23 2003-05-28 Rolls Royce Plc A fan having two rows of blades of differing diameters
NL2005491C2 (en) * 2010-10-11 2012-04-12 Jan Terlouw Marine propeller with front and further blade.
WO2012050441A1 (en) * 2010-10-11 2012-04-19 Jan Terlouw Marine propeller with front and further blade
CN115342033A (en) * 2022-07-13 2022-11-15 中国海洋大学 Wake flow detection method and system based on blade clearance and wind wheel rotating speed

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2128688A (en) * 1982-10-20 1984-05-02 Mitsui Shipbuilding Eng Ship propeller
GB2211558A (en) * 1987-10-26 1989-07-05 Deutsche Forsch Luft Raumfahrt Bladed rotor
GB2211558B (en) * 1987-10-26 1992-07-08 Deutsche Forsch Luft Raumfahrt Propeller
WO1996024727A1 (en) * 1995-02-07 1996-08-15 Hollandsche Beton Groep N.V. Device for creating a local water flow
NL9500228A (en) * 1995-02-07 1996-09-02 Hollandsche Betongroep Nv Arrangement for generating a local water flow
US6053663A (en) * 1995-02-07 2000-04-25 Dikken; Jacob Jan Device for creating a local water flow
US5807151A (en) * 1995-10-18 1998-09-15 Sanshin Kogyo Kabushiki Kaisha Propeller for marine propulsion drive
GB2382382A (en) * 2001-11-23 2003-05-28 Rolls Royce Plc A fan having two rows of blades of differing diameters
GB2382382B (en) * 2001-11-23 2005-08-10 Rolls Royce Plc A fan for a turbofan gas turbine engine
NL2005491C2 (en) * 2010-10-11 2012-04-12 Jan Terlouw Marine propeller with front and further blade.
WO2012050441A1 (en) * 2010-10-11 2012-04-19 Jan Terlouw Marine propeller with front and further blade
CN115342033A (en) * 2022-07-13 2022-11-15 中国海洋大学 Wake flow detection method and system based on blade clearance and wind wheel rotating speed

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