EP2025946B1 - Bande de recouvrement dotée d'une production de rayons de blocage - Google Patents

Bande de recouvrement dotée d'une production de rayons de blocage Download PDF

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Publication number
EP2025946B1
EP2025946B1 EP08014018.9A EP08014018A EP2025946B1 EP 2025946 B1 EP2025946 B1 EP 2025946B1 EP 08014018 A EP08014018 A EP 08014018A EP 2025946 B1 EP2025946 B1 EP 2025946B1
Authority
EP
European Patent Office
Prior art keywords
fluid
shroud
outlet
accordance
flow machine
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 - Fee Related
Application number
EP08014018.9A
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German (de)
English (en)
Other versions
EP2025946A3 (fr
EP2025946A2 (fr
Inventor
Volker Dr. Gümmer
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.)
Rolls Royce Deutschland Ltd and Co KG
Original Assignee
Rolls Royce Deutschland Ltd and Co KG
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 Rolls Royce Deutschland Ltd and Co KG filed Critical Rolls Royce Deutschland Ltd and Co KG
Publication of EP2025946A2 publication Critical patent/EP2025946A2/fr
Publication of EP2025946A3 publication Critical patent/EP2025946A3/fr
Application granted granted Critical
Publication of EP2025946B1 publication Critical patent/EP2025946B1/fr
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F04D29/08—Sealings
    • F04D29/16—Sealings between pressure and suction sides
    • F04D29/161—Sealings between pressure and suction sides especially adapted for elastic fluid pumps
    • F04D29/164—Sealings between pressure and suction sides especially adapted for elastic fluid pumps of an axial flow wheel
    • 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
    • F01D11/001—Preventing or minimising internal leakage of working-fluid, e.g. between stages for sealing space between stator blade and rotor
    • 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
    • F01D11/04—Preventing or minimising internal leakage of working-fluid, e.g. between stages by non-contact sealings, e.g. of labyrinth type using sealing fluid, e.g. steam
    • 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
    • F01D9/00—Stators
    • F01D9/06—Fluid supply conduits to nozzles or the like
    • F01D9/065—Fluid supply or removal conduits traversing the working fluid flow, e.g. for lubrication-, cooling-, or sealing fluids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • F04D27/02—Surge control
    • F04D27/0207—Surge control by bleeding, bypassing or recycling fluids
    • F04D27/0238—Details or means for fluid reinjection

Definitions

  • the 1a schematically shows a portion of a fluid flow machine, consisting of a rotor blade row and a stator blade row. Particularly emphasized is the shroud arrangement at the outer blade end of the rotor. According to the prior art, the shroud arrangement consists of a large cavity, which is provided in the housing and completely absorbs the shroud to create a smooth as possible outer main flow path boundary.
  • the 1b shows schematically shows a portion of a fluid flow machine, consisting of a fixed Stator blade row and a rotor blade row. Particularly emphasized is the shroud arrangement at the inner blade end of the fixed stator. According to the prior art, the shroud arrangement consists of a large cavity which is provided in the hub and which completely absorbs the shroud in order to create the smoothest possible inner main flow path boundary.
  • the Figure 1C schematically shows a portion of a fluid flow machine, consisting of a series of adjustable (variable) stators and a rotor blade row. Particularly emphasized is the shroud arrangement at the inner blade end of the displacement stator. According to the prior art, the shroud arrangement here also consists of a large cavity, which is provided in the hub and which completely absorbs the shroud in order to create the smoothest possible inner main flow path boundary.
  • the Fig.1d shows, representative of shrouds of adjustable or fixed rotors and stators, an arrangement of three rows of blades at the edge of the main flow path of a fluid flow machine, consisting of an upstream row of blades, a row of blades with shroud and a downstream row of blades.
  • This representation may be both a region on the housing and a region on the hub of the fluid flow machine.
  • the shroud is embedded in a surrounding component or a surrounding assembly (rotor hub or housing) and fits smoothly in the course of the main flow path according to the prior art without any projection.
  • the shroud may be solid or (not shown here) hollow and consists of one or more components.
  • the leakage flow (small arrows) occurring between the shroud and the surrounding component, which is opposite to the main flow direction (thick arrow) runs, is reduced by a number of sealing tips.
  • the sealing tips can be arranged on the surrounding component or even (as not shown here) on the shroud itself. There is usually a relative movement between the surrounding component and the shroud. In the area of the shroud, the leading edge (VK) and trailing edge (HK) of the considered blade row are indicated.
  • a thin long arrow characterizes the near-edge flow along the substantially smooth boundary of the main flow path.
  • the annular channel sections in front of and behind the illustrated blade row with shroud can be designed either without blades or can be provided with at least
  • the present invention relates to blade rows of fluid flow machines such as fans, compressors, pumps and fans of axial or semi-axial design with gaseous or liquid working fluid.
  • the turbomachine may include one or more stages, each having a rotor and a stator, in some cases the stage is merely formed by a rotor.
  • the rotor consists of a number of blades, which are connected to the rotating shaft of the machine and deliver energy to the working fluid.
  • the rotor can be designed with or without shroud on the outer blade end.
  • the stator consists of a number of fixed blades, the hub side as the housing side with fixed or free Can be performed blade end.
  • the rotor drum and the blading are usually surrounded by a housing.
  • the machine may also have a stator in front of the first rotor, a so-called leading wheel. At least one stator or Vorleitrad may - unlike the immovable fixation - be rotatably mounted to change the angle of attack. An adjustment is made for example by a spindle accessible from outside the annular channel.
  • said multi-stage turbomachine may have two counterrotating shafts so that the rotor blade rows change direction of rotation from stage to stage. There are no stators between successive rotors.
  • the fluid flow machine can alternatively have a bypass configuration such that the single-flow annular channel divides behind a certain row of blades into two concentric annular channels, which in turn accommodate at least one additional row of blades.
  • Fig. 2 shows by way of example four possible configurations of the fluid flow machine.
  • This seal comprises a honeycomb seal which cooperates with labyrinth tips. A portion of the cooling air that passes through the interior of the turbine blades exits downstream of the seal assembly and is recirculated into the main flowpath. There is no influence on the seal and the leakage flow which may occur.
  • the DE 196 01 818 A1 describes a further turbine blade arrangement with a shroud, wherein additionally blown on the upper edge of the last sealing rib in the flow direction of the leakage flow cooling air.
  • a cooled stator blade is known in which, similar to the construction of the above EP 1 384 855 A2 , Cooling air is discharged from the blade interior, wherein a part of the cooling air is combined with the hot gases, while another part of the cooling air flows through the labyrinth seal and thus amplifies the leakage current.
  • the invention has for its object to provide a fluid flow machine and an associated shroud, which is characterized by increased efficiency and optimized flow conditions.
  • a blade shroud arrangement for use in a turbomachine, which prevents the leakage through the cavity around the shroud by generating a fluid barrier jet.
  • FIG Fig.1d A conventional prior art shroud configuration as shown in FIG Fig.1d is shown, provides in the region of the trailing edge of the blade row concerned an unimpeded entry of the edge flow in the shroud cavity before, without the recirculating leakage flow is actively affected.
  • Particularly advantageous is the arrangement of the barrier beam on the inside, back, or outside.
  • Inventive shroud configurations are in 3a to Fig.6 shown.
  • the upstream and downstream of the considered blade row areas of the main flow path can of course, even if not shown here, accommodate more rows of blades.
  • Decisive for the present invention is the design of the shroud of the considered blade row.
  • FIG.3c show exemplary shroud configurations according to the invention, which require no additional changes of the components in the vicinity of the shroud compared to the conventional construction of the fluid flow machine.
  • the shroud has at least one inner chamber which extends over the entirety or only parts of the circumference.
  • the inner chamber is supplied with fluid by at least one blade of the shroud belonging to the shroud or by at least one additional line (see dashed arrow).
  • the inner chamber communicates via at least one outlet channel with the main flow path and has an opening on the inside of the shroud.
  • the opening of such an outlet is provided in the region of the trailing edge and has a nozzle-like shape. Due to its rectilinear course along the annular channel, the fluid jet flowing out of the opening obstructs access to the shroud cavity and in this way prevents a leakage flow through the cavity pointing in the direction of the main flow direction.
  • the 3b shows a shroud configuration according to the invention, wherein the opening of the outlet channel downstream of the trailing edge is arranged on the inside of the shroud and so creates the fluid barrier jet very close to the access to the cavity.
  • the 3 c shows a shroud configuration according to the invention, in which the opening of the outlet channel is arranged downstream of the trailing edge on the back of the shroud and so also produces the fluid barrier jet very close to the access to the cavity.
  • This arrangement requires according to the invention in the region of the trailing edge of the blade row with shroud a projection of the shroud in the main flow path for the purpose of forming a required heel and ensuring an undisturbed inflow of the barrier jet in the further course of the main flow path.
  • the 4a shows a shroud configuration according to the invention, in which the opening of the outlet channel is arranged downstream of the trailing edge on the back of the shroud and so also produces the fluid barrier jet very close to the access to the cavity.
  • This arrangement provides according to the invention no protrusion of the shroud in the main flow path for the purpose of forming a required paragraph, but provides an undisturbed inflow of the barrier jet in the course of the main flow path by providence of a flow bevel on the surrounding the shroud component, which may also in the bladed area may extend into a possibly downstream row of blades.
  • the inflow slope is located in direct extension and surrounding the outflow direction of the fluid jet from the outlet opening.
  • the 4b shows a shroud configuration according to the invention, in which the opening of the outlet channel is arranged downstream of the trailing edge on the back of the shroud.
  • This arrangement provides according to the invention for ensuring an undisturbed inflow of the barrier jet in the further course of the main flow path of a Ansträgeschräge on the the shroud surrounding the component, which continues far in the direction of the cavity floor and may optionally extend into the bladed region of a possibly downstream row of blades.
  • the 4c shows a shroud configuration according to the invention, in which the opening of the outlet channel in the vicinity of the obliquely oriented outer and back of the shroud is arranged.
  • this arrangement provides a contour of the cavity opposite the outlet opening, which serves as a flow slope and in this way ensures that the blocking effect is achieved and the fluid of the blocking jet finds its way to the main flow path.
  • the Fig.4d shows a shroud configuration according to the invention, in which the opening of the outlet channel is arranged in the vicinity of the back of the shroud on the outside of the shroud.
  • This arrangement according to the invention provides an outlet opening approximately opposite the inflow bevel, which starts from the bottom of the cavity. In this way it is ensured that the blocking effect is achieved and the fluid of the barrier jet finds its way to the main flow path.
  • the 5a shows a shroud configuration according to the invention, in which the opening of the outlet channel is arranged on the outside of the shroud.
  • this arrangement provides a flow orifice which is approximately opposite the outlet orifice and at the same time forms part of a sealing tip at the bottom of the cavity. In this way, it is ensured in a structurally particularly favorable manner that, in the presence of sealing points, the blocking effect is achieved and the fluid of the blocking jet finds its way to the main flow path.
  • the 5 b shows a shroud configuration according to the invention, in which the opening of the outlet channel is arranged in the vicinity of the back of the shroud on the outside of the shroud.
  • this arrangement provides an outlet bevel which is approximately opposite the outlet opening and at the same time forms part of a sealing tip with the greatest possible proximity to the main flow path. There is at least one additional heel to the bottom of the cavity.
  • the 5c shows a shroud configuration according to the invention, in which the opening of the outlet channel is arranged in the vicinity of the back of the shroud on the outside of the shroud.
  • this arrangement provides an outlet bevel which is approximately opposite the outlet opening and at the same time forms part of a sealing tip with the greatest possible proximity to the main flow path.
  • the outer shroud side and the cavity surface are here V-shaped.
  • the 6a shows in a spatial representation of an inventive shroud on the example of the arrangement according to 3 c or 4a , Recognizable are the ends of three blades of a shrouded blade row with an upstream view of the trailing edges of the blades.
  • the section through the arrangement of blade and shroud at the left edge of the figure shows schematically the guidance of fluid through at least one of the blades to the inner chamber of the shroud and the outflow of the fluid barrier jet through the outlet opening at the back of the shroud.
  • the Figure 6b finally shows an arrangement similar to in 6a but with a periodically circumferentially varying width of the outlet.
  • the period with which the outlet width fluctuates corresponds essentially to the pitch predetermined by the associated blades of the blade row, ie S is approximately equal to or equal to P.
  • Shroud according to item 1, characterized in that at least one outlet for the generation of the blocking jet is arranged on the main flow path on the inner side of the shroud in the vicinity of the blade trailing edge.
  • Shroud according to item 1 or 2, characterized in that at least one outlet for blocking jet generation in the immediate vicinity of the main flow path on the shroud rear side is arranged and the shroud in this area to allow undisturbed propagation of the fluid barrier jet along the boundary of the main flow path has a shoulder (supernatant) ,
  • Shroud according to one of the items 1 to 3, characterized in that at least one outlet for the generation of blocking jets in the immediate vicinity of the main flow path on the shroud rear side and in direct extension of the outlet channel a flow bevel is provided on the surrounding the shroud component, directed against the fluid barrier jet and in the further course ensures a snuggling of the fluid barrier jet to the boundary of the main flow path.
  • Shroud according to one of the items 1 to 4, characterized in that at least one outlet for generating the blocking beam is arranged on the outside of the shroud and in direct extension of the outlet channel on the component surrounding the shroud a Ansträgeschräge is provided, against which the fluid barrier jet is directed and in the further Course a snuggling the fluid barrier jet to the boundary of the Deckbandkavtician and ensures supply of the barrier jet fluid to the main flow path.
  • Shroud according to one of the points 1 to 5, characterized in that the Anströmschräge adjacent to a formed as a sealing peak survey of the shroud surrounding cavity contour and in this way a locally and functionally combined effect of sealing tip and barrier beam is achieved.
  • Shroud according to one of the items 1 to 6, characterized in that viewed in the meridian section of the turbomachine at least one further outgoing from one of the inner chambers outlet is provided at another position on one of the shroud sides.
  • Shroud according to one of the points 1 to 7, characterized in that at least one outlet opening is formed by an axisymmetric, continuous in the circumferential direction slot constant width.
  • Shroud according to one of the points 1 to 7, characterized in that at least one outlet opening is formed by an axisymmetric, interrupted in the circumferential direction slot constant width.
  • Shroud according to one of the items 1 to 9, characterized in that the number of interruptions is given as a single or multiple of the number of blades of the relevant blade row with shroud.
  • Shroud according to one of the items 1 to 10, characterized in that at least one outlet opening is provided by a circumferentially extending series of holes.
  • Shroud according to one of the items 1 to 11, characterized in that at least one outlet opening is provided by a circumferentially oriented grouping of inclined against the circumferential direction and possibly overlapping in the circumferential direction slots.
  • Shroud according to one of the items 1 to 12, characterized in that the width of the outlet opening varies periodically in the circumferential direction and the circumferential angle amount or the circumferential length of the fluctuation period P substantially coincides with the circumferential angle amount or the circumferential length of a blade pitch S or forms a multiple.
  • Shroud according to one of the points 1 to 13, characterized in that the outlet channel to the outlet opening has a contracting and thus nozzle-shaped cross-sectional profile.
  • Shroud according to one of the items 1 to 14, characterized in that, except in combination with a flow slope, which ensures the effectiveness of the fluid barrier jet, no further sealing tips are provided on the shroud or on the cavity contour.
  • the present invention allows a significantly higher aerodynamic load capacity of rotors and stators in turbomachines, with a constant or increased Efficiency.
  • a reduction in specific fuel consumption of up to 0.5% is to be expected.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Claims (19)

  1. Machine à écoulement avec une voie d'écoulement principale, dans laquelle est disposée au moins une rangée d'aubes (1) qui délivrent de l'énergie à un fluide traversant la voie d'écoulement principale et sont munies d'un anneau de renforcement (2), lequel est inséré dans un évidement (3) d'un composant, ledit évidement formant une cavité (9), sachant que le composant et les aubes (1) effectuent un mouvement rotatif relatif entre eux, qu'à travers la cavité (9) passe un écoulement de fuite s'écoulant dans le sens inverse au sens d'écoulement principal dans la voie d'écoulement principale,
    caractérisée en ce
    - que le sous-ensemble formant l'anneau de renforcement présente au moins une chambre intérieure (7),
    - que l'au moins une chambre intérieure (7) est alimentable en fluide par une source,
    - que l'au moins une chambre intérieure (7) est reliée par au moins une sortie (8) à la voie d'écoulement principale entourant les aubes (1) ou à la cavité (9) entourant l'anneau de renforcement (2),
    - que l'au moins une sortie (8) est située sur un côté de l'anneau de renforcement (2), et
    - que la forme de la sortie (8) et la forme de l'orifice de sortie sont conçues de manière telle que de la sortie (8) sort un jet de blocage de fluide qui empêche une recirculation de fluide à travers la cavité (9).
  2. Machine à écoulement selon la revendication n° 1, caractérisée en ce que le sous-ensemble formant l'anneau de renforcement (2) présente l'au moins une chambre intérieure (7) sur la totalité de la circonférence.
  3. Machine à écoulement selon la revendication n° 1, caractérisée en ce que le sous-ensemble formant l'anneau de renforcement présente l'au moins une chambre intérieure (7) sur une partie de la circonférence.
  4. Machine à écoulement selon une des revendications n° 1 à n° 3, caractérisée en ce que l'au moins une chambre intérieure (7) est alimentable en fluide par la source moyennant au moins une aube (1).
  5. Machine à écoulement selon une des revendications n° 1 à n° 3, caractérisée en ce que l'au moins une chambre intérieure (7) est alimentable en fluide par la source moyennant au moins une conduite d'alimentation additionnelle.
  6. Machine à écoulement selon une des revendications n° 1 à n° 5, caractérisée en ce que pour générer le jet de blocage dans la voie d'écoulement principale, au moins une sortie (8) est disposée sur la face intérieure de l'anneau de renforcement à proximité d'un bord de fuite d'aube.
  7. Machine à écoulement selon une des revendications n° 1 à n° 6, caractérisée en ce que pour générer le jet de blocage dans la proximité immédiate de la voie d'écoulement principale, au moins une sortie (8) est disposée sur la face arrière de l'anneau de renforcement et que l'anneau de renforcement (2) présente dans cette zone une saillie pour permettre une propagation sans entrave du jet de blocage de fluide le long de la délimitation de la voie d'écoulement principale.
  8. Machine à écoulement selon une des revendications n° 1 à n° 7, caractérisée en ce que pour générer le jet de blocage dans la proximité immédiate de la voie d'écoulement principale, au moins une sortie (8) est disposée sur la face arrière de l'anneau de renforcement et que dans le prolongement direct de la sortie (8) est pratiquée sur le composant entourant l'anneau de renforcement (2) une rampe d'attaque (10) contre laquelle est dirigé le jet de blocage de fluide et qui assure dans la suite un contact intime du jet de blocage de fluide avec la délimitation de la voie d'écoulement principale.
  9. Machine à écoulement selon une des revendications n° 1 à n° 8, caractérisée en ce que pour générer le jet de blocage au moins une sortie (8) est disposée sur la face extérieure de l'anneau de renforcement et que dans le prolongement direct de la sortie (8) est pratiquée sur le composant entourant l'anneau de renforcement (2) une rampe d'attaque (10) contre laquelle est dirigé le jet de blocage de fluide et qui assure dans la suite un contact intime du jet de blocage de fluide avec la délimitation de la cavité de l'anneau de renforcement et une alimentation du fluide du jet de blocage à la voie d'écoulement principale.
  10. Machine à écoulement selon une des revendications n° 8 ou n° 9, caractérisée en ce que la rampe d'attaque (10) jouxte une protubérance du contour de la cavité entourant l'anneau de renforcement, et qui est formée en tant que crête d'étanchéité, et que de cette manière est atteint un effet combiné local et fonctionnel de crête d'étanchéité et de jet de blocage.
  11. Machine à écoulement selon une des revendications n° 1 à n° 10, caractérisée en ce qu'en coupe méridienne de la machine à écoulement est prévue au moins une autre sortie (11), partant d'une chambre intérieure (7), à une autre position sur un des côtés de l'anneau de renforcement.
  12. Machine à écoulement selon une des revendications n° 1 à n° 11, caractérisée en ce qu'au moins une sortie (8, 11) est formée par une fente symétrique par rapport à l'axe, ininterrompue dans le sens circonférentiel, et de largeur constante.
  13. Machine à écoulement selon une des revendications n° 1 à n° 12, caractérisée en ce qu'au moins une sortie (8, 11) est formée par une fente symétrique par rapport à l'axe, interrompue dans le sens circonférentiel, et de largeur constante.
  14. Machine à écoulement selon la revendication n° 13, caractérisée en ce que le nombre des interruptions est obtenu comme équivalent ou multiple du nombre des aubes (1) de la rangée d'aubes avec anneau de renforcement (2) concernée.
  15. Machine à écoulement selon une des revendications n° 1 à n° 14, caractérisée en ce qu'au moins une sortie (8, 11) est formée par une rangée de trous s'étendant dans le sens circonférentiel.
  16. Machine à écoulement selon une des revendications n° 1 à n° 15, caractérisée en ce qu'au moins une sortie (8, 11) est obtenue par un groupement orienté dans le sens circonférentiel de fentes inclinées dans le sens inverse au sens circonférentiel et/ ou se chevauchant dans le sens circonférentiel.
  17. Machine à écoulement selon une des revendications n° 1 à n° 16, caractérisée en ce que la largeur de la sortie (8, 11) varie périodiquement dans le sens circonférentiel et que la valeur de l'angle périphérique ou la longueur périphérique de la période de variation (P) correspond quasiment à la valeur de l'angle périphérique ou à la longueur périphérique d'un pas d'aubes (S), ou en est un multiple.
  18. Machine à écoulement selon une des revendications n° 1 à n° 17, caractérisée en ce qu'un canal de sortie menant à la sortie (8, 11) présente une section transversale contractante et/ ou en forme de buse.
  19. Machine à écoulement selon une des revendications n° 8 à n° 18, caractérisée en ce qu'à part en combinaison avec la rampe d'attaque (10), qui assure l'efficacité du jet blocage de fluide, aucune autre crête d'étanchéité n'est prévue sur l'anneau de renforcement (2) ou sur le contour de la cavité (9).
EP08014018.9A 2007-08-10 2008-08-05 Bande de recouvrement dotée d'une production de rayons de blocage Expired - Fee Related EP2025946B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007037855A DE102007037855A1 (de) 2007-08-10 2007-08-10 Schaufeldeckband mit Sperrstrahlerzeugung

Publications (3)

Publication Number Publication Date
EP2025946A2 EP2025946A2 (fr) 2009-02-18
EP2025946A3 EP2025946A3 (fr) 2013-07-31
EP2025946B1 true EP2025946B1 (fr) 2014-06-18

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US (1) US8403630B2 (fr)
EP (1) EP2025946B1 (fr)
DE (1) DE102007037855A1 (fr)

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EP2292897A1 (fr) * 2009-09-02 2011-03-09 Alstom Technology Ltd Turbine à flux axial
US9938840B2 (en) * 2015-02-10 2018-04-10 United Technologies Corporation Stator vane with platform having sloped face
US10161250B2 (en) 2015-02-10 2018-12-25 United Technologies Corporation Rotor with axial arm having protruding ramp
US10330121B2 (en) * 2015-02-26 2019-06-25 Honeywell International Inc. Systems and methods for axial compressor with secondary flow
US10451084B2 (en) 2015-11-16 2019-10-22 General Electric Company Gas turbine engine with vane having a cooling inlet
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US20090047120A1 (en) 2009-02-19
US8403630B2 (en) 2013-03-26
EP2025946A3 (fr) 2013-07-31
EP2025946A2 (fr) 2009-02-18
DE102007037855A1 (de) 2009-02-12

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