GB1149616A - Improvements relating to impulse turbines - Google Patents

Improvements relating to impulse turbines

Info

Publication number
GB1149616A
GB1149616A GB17277/66A GB1727766A GB1149616A GB 1149616 A GB1149616 A GB 1149616A GB 17277/66 A GB17277/66 A GB 17277/66A GB 1727766 A GB1727766 A GB 1727766A GB 1149616 A GB1149616 A GB 1149616A
Authority
GB
United Kingdom
Prior art keywords
rotor
guide
guide ring
boundary layer
flow
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
GB17277/66A
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.)
Sulzer Escher Wyss AG
Original Assignee
Escher Wyss AG
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 Escher Wyss AG filed Critical Escher Wyss AG
Publication of GB1149616A publication Critical patent/GB1149616A/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
    • F01D1/00—Non-positive-displacement machines or engines, e.g. steam turbines
    • F01D1/02—Non-positive-displacement machines or engines, e.g. steam turbines with stationary working-fluid guiding means and bladed or like rotor, e.g. multi-bladed impulse steam turbines
    • F01D1/04—Non-positive-displacement machines or engines, e.g. steam turbines with stationary working-fluid guiding means and bladed or like rotor, e.g. multi-bladed impulse steam turbines traversed by the working-fluid substantially axially
    • 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
    • F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
    • F01D11/02—Preventing or minimising internal leakage of working-fluid, e.g. between stages by non-contact sealings, e.g. of labyrinth type
    • 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
    • F01D5/141—Shape, i.e. outer, aerodynamic form
    • F01D5/142—Shape, i.e. outer, aerodynamic form of the blades of successive rotor or stator blade-rows
    • F01D5/143—Contour of the outer or inner working fluid flow path wall, i.e. shroud or hub contour
    • 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
    • F01D5/141—Shape, i.e. outer, aerodynamic form
    • F01D5/145—Means for influencing boundary layers or secondary circulations

Abstract

1,149,616. Boundary layer control. ESCHER WYSS A.G. 20 April, 1966 [22 April, 1965], No. 17277/66. Heading F2R. [Also in Division F1] To improve the efficiency of a gas or steam turbine of impulse type having guide blades 11 directing working fluid on to rotor blades 21, the circumferentially extending surfaces SW 2i and SW 2a extending between the rotor blade roots and tips to define the flow passage through the rotor 20 are of radii with respect to the corresponding surfaces SW 1i and SW 1a of the guide blade ring 10 such as to extend into the boundary layer flow zones of the fluid delivered by the guide blades. The radial offset h, Fig. 3, between the adjacent rotor and guide ring surfaces is between 0À5 and 2 times where # 0 is the thickness of the boundary layer adjacent the guide ring surfaces, #S is the axial gap between the guide ring 10 and rotor 20 and α 1 is the angle between the direction of fluid flow at the guide ring outlet and a plane normal to the rotational axis of the turbine. The inlet edges 200, 220 of the rotor are rounded to improve the flow, the radius of curvature r being # h.
GB17277/66A 1965-04-22 1966-04-20 Improvements relating to impulse turbines Expired GB1149616A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH557565A CH432554A (en) 1965-04-22 1965-04-22 Constant pressure turbine stage

Publications (1)

Publication Number Publication Date
GB1149616A true GB1149616A (en) 1969-04-23

Family

ID=4295867

Family Applications (1)

Application Number Title Priority Date Filing Date
GB17277/66A Expired GB1149616A (en) 1965-04-22 1966-04-20 Improvements relating to impulse turbines

Country Status (2)

Country Link
CH (1) CH432554A (en)
GB (1) GB1149616A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2393930A1 (en) * 1977-06-09 1979-01-05 United Technologies Corp REDUCED-DRAWING AUBAGE PLATFORMS
EP2055896A1 (en) * 2007-10-31 2009-05-06 Siemens Aktiengesellschaft Bucket for a turbine of a thermal power plant having a foot section
FR2938642A1 (en) * 2008-11-19 2010-05-21 Faure Herman TURBINE FOR MEASURING PETROLEUM PRODUCTS CHARGED WITH A FRICTION REDUCING AGENT
EP2003292A3 (en) * 2007-06-14 2012-04-04 Rolls-Royce Deutschland Ltd & Co KG Blade shroud with overhang

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2393930A1 (en) * 1977-06-09 1979-01-05 United Technologies Corp REDUCED-DRAWING AUBAGE PLATFORMS
EP2003292A3 (en) * 2007-06-14 2012-04-04 Rolls-Royce Deutschland Ltd & Co KG Blade shroud with overhang
EP2055896A1 (en) * 2007-10-31 2009-05-06 Siemens Aktiengesellschaft Bucket for a turbine of a thermal power plant having a foot section
FR2938642A1 (en) * 2008-11-19 2010-05-21 Faure Herman TURBINE FOR MEASURING PETROLEUM PRODUCTS CHARGED WITH A FRICTION REDUCING AGENT
WO2010058092A1 (en) * 2008-11-19 2010-05-27 Faure Herman Turbine for measuring petroleum products charged with a friction reducing agent
US7942071B2 (en) 2008-11-19 2011-05-17 Faure Herman Turbine for measuring petroleum products which are charged with a viscosity reduction agent

Also Published As

Publication number Publication date
CH432554A (en) 1967-03-31

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