EP0020426A1 - Blade grid for turbine. - Google Patents
Blade grid for turbine.Info
- Publication number
- EP0020426A1 EP0020426A1 EP79901202A EP79901202A EP0020426A1 EP 0020426 A1 EP0020426 A1 EP 0020426A1 EP 79901202 A EP79901202 A EP 79901202A EP 79901202 A EP79901202 A EP 79901202A EP 0020426 A1 EP0020426 A1 EP 0020426A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- blade
- grid
- blades
- ceiling
- floor
- 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.)
- Granted
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
- 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
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- 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
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/68—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers
- F04D29/681—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers especially adapted for elastic fluid pumps
Definitions
- the present invention relates to a grid of blades for a turbine comprising a series of blades arranged between a ceiling and a floor.
- This series of blades thus defines a series of channels traversed by a fluid, each channel being limited by the upper surface of a blade and by the lower surface of the neighboring blade as well as by the floor and the ceiling.
- the slippage generates a whirl of counterclockwise direction at the ceiling of the channel and in the opposite direction to the floor for an observer placed downstream of the grid of blades.
- the grid of blades according to the present invention making it possible to reduce the secondary losses without influencing the losses by friction in the main flow is characterized in that it comprises for each blade at least one communication pierced in the ceiling and leading to a end in the vicinity of the upper surface of said blade at the level of the neck of the channel limited by the upper surface of said blade and at the other end at a point located upstream of said grid and / or at least one communication pierced in the floor and opening at one end in the vicinity of the upper surface of said blade at the neck of the channel limited by the upper surface of said blade and at the other end at a point located downstream of said grid.
- the neck of the canal is where the upper surface of the dawn and the lower surface of the neighboring dawn which delimits it are closest.
- the point located near the upper surface of the dawn in the neck of the canal is the point of the canal where the pressure is minimal.
- the blade grid according to the invention the upper suction pressure is reduced by communication with a higher pressure chamber, thereby reducing the average pressure difference between upper and lower surfaces.
- this pressure reduction takes place only in line with the floor and / or the ceiling of the channel, thereby reducing secondary losses, while the aerodynamic load remains optimal in the healthy part of the channel.
- This reduction in depression at the level of the upper surface leads to a reduction in the slip of the boundary layers and in losses by secondary flow.
- the blade grid does not have a ceiling (in the case of certain movable blades) or floor (in the case of certain fixed blades), communications are then provided only in the floor (in the case of said movable blades) or in the ceiling (case of said fixed blades).
- FIG. 1 shows a part of the blade grid of a conventional turbine.
- FIG. 2 shows an axial section of a turbine comprising the vane grids according to the invention.
- FIG. 3 shows a cross section seen from above of a blade grid according to the invention.
- FIG 1 there are shown two blades A and B which are part of a crown and whose foot is fixed on a floor 1 and the head on a ceiling 2.
- the floor and the ceiling are usually cylindrical or frustoconical surfaces.
- Channel 3 has a neck 6 (see Figure 3) which is where the upper surface of dawn A is closest to the lower surface of dawn B.
- FIG. 2 there is shown in axial section a turbine provided with fixed vane grids 4 and movable 5 according to the invention.
- the fixed blade grid 4 comprises for each blade a communication 13 hollowed out in the floor 11 between a point located in the vicinity of the upper surface of the blade at the neck 6 of the channel which is the point of minimum pressure along the upper surface and a point located upstream of the blade grid 4 (see FIG. 3) in a region where the pressure is high.
- the fixed grid 4 also includes, for each blade, a communication 14 hollowed out in the ceiling 12 between a point located in the vicinity of the upper surface of the blade at the neck 6 of the channel and ending upstream of said blade grid in an area where the pressure is high.
- the movable blade grid 5 comprises, for each blade, a communication 24 hollowed out in the ceiling 22 which starts from a point located in the vicinity of the upper surface of the blade at the neck 6 of the channel (minimum pressure point ) and which ends upstream of said grid 5 (high pressure region).
- the movable blade grid 5 also includes for each blade a communication 23 hollowed out in the floor 21 which starts from a point located in the vicinity of the upper surface of the dawn at the level of the neck 6 of the channel (minimum pressure point) and which terminates upstream of the grid 5 (high pressure region).
- the communications between a point of the floor and / or of the ceiling situated at the point of minimum pressure of the upper surface of the blades and a point situated in a high pressure chamber constituted by the part situated upstream of the blades makes it possible to reduce the depression in the vicinity of the upper surface of the blades at floor and / or ceiling level. It goes without saying that the turbine according to the invention could include such communications only on the movable grids or on the fixed grids hollowed out in the floor and / or the ceiling of these grids.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Grille d'aubes pour turbine comportant une suite d'aubes disposees entre un plafond (12) et un plancher (11) definissant une suite de canaux (3). Cette grille comporte des communications (13, 14) percees dans le plafond (12) et/ou le plancher (11) debouchant a une extremite au voisinage de l'extrados des aubes au niveau du col (6) du canal et a l'autre extremite en amont de la grille. Reduction de la depression extrados uniquement au droit du plancher (12) et du plafond (11) entrainant une diminution des pertes secondaires, tandis que la repartition de la pression reste optimale dans la partie saine du canal.Grid of blades for a turbine comprising a series of blades arranged between a ceiling (12) and a floor (11) defining a series of channels (3). This grid comprises communications (13, 14) pierced in the ceiling (12) and / or the floor (11) opening at one end in the vicinity of the upper surface of the blades at the neck (6) of the channel and at the other end upstream of the grid. Reduction of the extrados depression only to the right of the floor (12) and the ceiling (11) leading to a reduction in secondary losses, while the pressure distribution remains optimal in the healthy part of the canal.
Description
Grille d'aubes pour turbineBlade grid for turbine
La présente invention a trait à une grille d'aubes pour turbine comportant une suite d'aubes disposées entre un plafond et un plancher. Cette suite d'aubes définit ainsi une suite de canaux parcourus par un fluide, chaque canal étant limité par l'extrados d'une aube et par l'intrados de l'aube voisine ainsi que par le plancher et le plafond.The present invention relates to a grid of blades for a turbine comprising a series of blades arranged between a ceiling and a floor. This series of blades thus defines a series of channels traversed by a fluid, each channel being limited by the upper surface of a blade and by the lower surface of the neighboring blade as well as by the floor and the ceiling.
On sait que dans un canal donné, suffisamment loin des parois du canal, les filets de fluide suivent des trajectoires sensiblement parallèles aux parois du canal formées par les aubes, intrados pour l'une et extrados pour l'autre. En tous points de cette trajectoire, l'effort centrifuge qui s'exerce sur une particule est équilibré par les forces de pression. Il en résulte que globalement l'intrados de l'aube est en surpression par rapport à l'extrados de l'autre aube délimitant le canal. On sait d'autre part que dans la couche limite située à proximité du plancher et du plafond les vitesses du fluide sont faibles; il s'ensuit que les efforts de pression ne sont plus équilibrés et les trajectoires des filets sont des courbes perpendiculaires aux isobares et vont dans chaque canal de l'intrados vers l'extrados en un véritable dérapage bien connu de l'homme de l'art (voir par exemple l'articleIt is known that in a given channel, sufficiently far from the walls of the channel, the fluid streams follow trajectories substantially parallel to the walls of the channel formed by the vanes, pressure side for one and pressure side for the other. At all points along this trajectory, the centrifugal force exerted on a particle is balanced by the pressure forces. As a result, the lower surface of the blade is generally under overpressure with respect to the upper surface of the other blade delimiting the channel. We also know that in the boundary layer located near the floor and the ceiling, the fluid velocities are low; it follows that the pressure forces are no longer balanced and the trajectories of the threads are curves perpendicular to the isobars and go in each channel from the lower surface to the upper surface in a true slip well known to the man of the art (see for example the article
"Sur les pertes à l'extrémité des aubes de turbine", Revue Brown Boveri, en français, novembre 1941, p.356 à 361, en particulier les figures 2 et 3)."On the losses at the end of the turbine blades", Revue Brown Boveri, in French, November 1941, p.356 to 361, in particular Figures 2 and 3).
Le dérapage engendre un tourbillon de sens trigonométrique au plafond du canal et dans le sens inverse au plancher pour un observateur placé à l'aval de la grille d'aubes.The slippage generates a whirl of counterclockwise direction at the ceiling of the channel and in the opposite direction to the floor for an observer placed downstream of the grid of blades.
Ces perturbations s'accompagnent de pertes importantes qui sont connues sous le nom de pertes secondaires qui affectent d'autant plus le rendement d'une grille d'aubes que le rapport entre la hauteur des aubes et la corde est faible.These disturbances are accompanied by significant losses which are known as secondary losses which all the more affect the efficiency of a blade grid when the ratio between the height of the blades and the string is low.
Un, moyen connu de réduire les pertes secondaires consiste à diminuer la charge aérodynamique des aubes, ce qui revient à diminuer la différence de pression moyenne entre intrados et extrados en diminuant par exemple le rapport pas sur corde de la grille d'aubes.
Mais ce procédé présente l'inconvénient d'augmenter les pertes par frottement dans la zone saine du canal , de telle sorte que le gain obtenu sur les pertes secondaires peut être annulé par l'augmentation des pertes par frottement dans l'écoulement principal. La grille d'aubes selon la présente invention permettant de diminuer les pertes secondaires sans influer sur les pertes par frottement dans l'écoulement principal est caractérisée en ce qu'elle comporte pour chaque aube au moins une communication percée dans le plafond et débouchant à une extrémité au voisinage de l'extrados de ladite aube au niveau du col du canal limité par l'extrados de ladite aube et à l'autre extrémité en un point situé en amont de ladite grille et/ou au moins une communication percée dans le plancher et débouchant à une extrémité au voisinage de l'extrados de ladite aube au niveau du col du canal limité par l'extrados de ladite aube et à l'autre extrémité en un point situé en aval de ladite grille. Le col du canal est l'endroit où l'extrados de l'aube et l'intrados de l'aube voisine qui le délimite sont les plus rapprochés.One known way of reducing secondary losses consists in reducing the aerodynamic load of the blades, which amounts to decreasing the average pressure difference between lower and upper surfaces by reducing, for example, the pitch pitch ratio of the blade grid. However, this method has the drawback of increasing the friction losses in the healthy zone of the channel, so that the gain obtained on the secondary losses can be canceled out by increasing the friction losses in the main flow. The grid of blades according to the present invention making it possible to reduce the secondary losses without influencing the losses by friction in the main flow is characterized in that it comprises for each blade at least one communication pierced in the ceiling and leading to a end in the vicinity of the upper surface of said blade at the level of the neck of the channel limited by the upper surface of said blade and at the other end at a point located upstream of said grid and / or at least one communication pierced in the floor and opening at one end in the vicinity of the upper surface of said blade at the neck of the channel limited by the upper surface of said blade and at the other end at a point located downstream of said grid. The neck of the canal is where the upper surface of the dawn and the lower surface of the neighboring dawn which delimits it are closest.
Le point situé au voisinage de l'extrados de l'aube dans le col du canal est le point du canal où la pression est minimale. Grâce à la grille d'aubes selon l'invention, la dépression extrados est réduite par une communication avec une chambre de pression plus forte, diminuant ainsi l'écart de pression moyen entre extrados et intrados. Mais cette réduction de pression a lieu uniquement au droit du plancher et/ou du plafond du canal, diminuant ainsi les pertes secondaires, tandis que la charge aérodynamique reste optimale dans la partie saine du canal. Cette réduction de la dépression au droit de l'extrados entraîne la diminution du dérapage des couches limites et des pertes par écoulement secondaire.The point located near the upper surface of the dawn in the neck of the canal is the point of the canal where the pressure is minimal. Thanks to the blade grid according to the invention, the upper suction pressure is reduced by communication with a higher pressure chamber, thereby reducing the average pressure difference between upper and lower surfaces. However, this pressure reduction takes place only in line with the floor and / or the ceiling of the channel, thereby reducing secondary losses, while the aerodynamic load remains optimal in the healthy part of the channel. This reduction in depression at the level of the upper surface leads to a reduction in the slip of the boundary layers and in losses by secondary flow.
Au cas où la grille d'aubes ne comporte pas de plafond (cas de certaines aubes mobiles) ou de plancher (cas de certaines aubes fixes) , les communications ne sont alors ménagées que dans le plancher (cas desdites aubes mobiles) ou dans le plafond (cas desdites aubes fixes ) . ,If the blade grid does not have a ceiling (in the case of certain movable blades) or floor (in the case of certain fixed blades), communications are then provided only in the floor (in the case of said movable blades) or in the ceiling (case of said fixed blades). ,
La description qui va suivre en regard des dessins annexés fera mieux comprendre comment l'invention peut être mise en oeuvre. - La figure 1 représente une partie de la grille d'aubes d'une turbine classique .
- La figure 2 représente une coupe axiale d'une turbine comprenant les grilles d'aubes selon l'invention.The description which follows with reference to the appended drawings will make it easier to understand how the invention can be implemented. - Figure 1 shows a part of the blade grid of a conventional turbine. - Figure 2 shows an axial section of a turbine comprising the vane grids according to the invention.
- La figure 3 représente une coupe transversale vue de dessus d'une grille d'aubes selon l'invention. Sur la figure 1 on a représenté deux aubes A et B qui font partie d'une couronne et dont le pied est fixé sur un plancher 1 et la tête sur un plafond 2. Le plancher et le plafond sont habituellement des surfaces cylindriques ou tronconiques .- Figure 3 shows a cross section seen from above of a blade grid according to the invention. In Figure 1 there are shown two blades A and B which are part of a crown and whose foot is fixed on a floor 1 and the head on a ceiling 2. The floor and the ceiling are usually cylindrical or frustoconical surfaces.
L'intrados de l'aube B, l'extrados de l'aube A et le plancher et le plafond définissent un canal 3. Le canal 3 comporte un col 6 (voir figure 3) qui est l'endroit où l'extrados de l'aube A est le plus proche de l'intrados de l'aube B.The lower surface of dawn B, the upper surface of dawn A and the floor and ceiling define a channel 3. Channel 3 has a neck 6 (see Figure 3) which is where the upper surface of dawn A is closest to the lower surface of dawn B.
Dans ce canal, loin des parois, l'écoulement se fait en suivant des filets sains tels que (c). Par contre, au contact du plafond et du plancher les filets de fluide sont orthogonaux aux isobares et suivent les directions représentées (1) (m) puis commencent à tourbillonner dès qu'ils ont heurté l'extrados de l'aube (A). Sur la figure 2 on a représenté en coupe axiale une turbine munie de grilles d'aubes fixe 4 et mobile 5 selon l'invention. La grille d'aubes fixe 4 comporte pour chaque aube une communication 13 creusée dans le plancher 11 entre un point situé au voisinage de l'extrados de l'aube au niveau du col 6 du canal qui est le point de pression minimale le long de l'extrados et un point situé en amont de la grille d'aubes 4 (voir figure 3) dans une région où la pression est haute.In this channel, far from the walls, the flow is done by following healthy nets such as (c). On the other hand, in contact with the ceiling and the floor, the fluid streams are orthogonal to the isobars and follow the directions shown (1) (m) then begin to swirl as soon as they hit the upper surface of the dawn (A). In Figure 2 there is shown in axial section a turbine provided with fixed vane grids 4 and movable 5 according to the invention. The fixed blade grid 4 comprises for each blade a communication 13 hollowed out in the floor 11 between a point located in the vicinity of the upper surface of the blade at the neck 6 of the channel which is the point of minimum pressure along the upper surface and a point located upstream of the blade grid 4 (see FIG. 3) in a region where the pressure is high.
La grille fixe 4 comporte également, pour chaque aube, une communication 14 creusée dans le plafond 12 entre un point situé au voisinage de l'extrados de l'aube au niveau du col 6 du canal et aboutissant en amont de ladite grille d'aubes dans une région où la pression est haute.The fixed grid 4 also includes, for each blade, a communication 14 hollowed out in the ceiling 12 between a point located in the vicinity of the upper surface of the blade at the neck 6 of the channel and ending upstream of said blade grid in an area where the pressure is high.
La grille d'aubes mobile 5 comporte, pour chaque aube, une communication 24 creusée dans le plafond 22 qui part d'un point situé au voisinage de l'extrados de l'aube au niveau du col 6 du canal (point de pression minimale) et qui aboutit en amont de ladite grille 5 (région de pression haute) .The movable blade grid 5 comprises, for each blade, a communication 24 hollowed out in the ceiling 22 which starts from a point located in the vicinity of the upper surface of the blade at the neck 6 of the channel (minimum pressure point ) and which ends upstream of said grid 5 (high pressure region).
La grille d'aubes mobile 5 comporte également pour chaque aube une communication 23 creusée dans le plancher 21 qui part d'un point
situé au voisinage de l'extrados de l'aube au niveau du col 6 du canal (point de pression minimale) et qui aboutit en amont de la grille 5 (région de pression haute).The movable blade grid 5 also includes for each blade a communication 23 hollowed out in the floor 21 which starts from a point located in the vicinity of the upper surface of the dawn at the level of the neck 6 of the channel (minimum pressure point) and which terminates upstream of the grid 5 (high pressure region).
Les communications entre un point du plancher et/ou du plafond situé au point de pression minimale de l'extrados des aubes et un point situé dans une chambre haute pression constituée par la partie située en amont des aubes permettent de réduire la dépression au voisinage de l'extrados des aubes au niveau du plancher et/ou du plafond. II va de soi que la turbine selon l'invention pourrait ne comporter de telles communications que sur les grilles mobiles ou sur les grilles fixes creusées dans le plancher et/ou le plafond de ces grilles .The communications between a point of the floor and / or of the ceiling situated at the point of minimum pressure of the upper surface of the blades and a point situated in a high pressure chamber constituted by the part situated upstream of the blades makes it possible to reduce the depression in the vicinity of the upper surface of the blades at floor and / or ceiling level. It goes without saying that the turbine according to the invention could include such communications only on the movable grids or on the fixed grids hollowed out in the floor and / or the ceiling of these grids.
De plus ces communications pourraient n'être associées qu'à certaines aubes d'une même grille.
In addition, these communications could only be associated with certain blades of the same grid.
Claims
1. Grille d'aubes pour turbine comportant une suite d'aubes disposées entre un plafond et un plancher définissant une . suite de canaux, caractérisée en ce qu'elle comporte pour chaque aube au moins deux communications percées (13,14), l'une dans le plafond (12) et l'autre dans le plancher (11), chaque communication (13,14) débouchant à une extrémité au voisinage de l'extrados de l'aube au niveau du col (6) du canal limité par l'extrados de ladite aube et à l'autre extrémité en un point situé en amont de ladite grille.1. Grid of blades for a turbine comprising a series of blades arranged between a ceiling and a floor defining a. series of channels, characterized in that it comprises for each blade at least two pierced communications (13,14), one in the ceiling (12) and the other in the floor (11), each communication (13, 14) opening at one end in the vicinity of the upper surface of the blade at the neck (6) of the channel limited by the upper surface of said blade and at the other end at a point located upstream of said grid.
2. Grille d'aubes pour turbine comportant une suite d'aubes disposées entre un plafond et un plancher définissant une suite de canaux, caractérisée en ce qu'elle comporte des communications associées aux aubes (14) et percées dans le plafond (12) , chaque communication débouchant à une extrémité au voisinage de l'extrados de l'aube au niveau du col (6) du canal limité par l'extrados de ladite aube et à l'autre extrémité en un point situé en amont de ladite grille.2. Grid of blades for a turbine comprising a series of blades arranged between a ceiling and a floor defining a series of channels, characterized in that it comprises communications associated with the blades (14) and drilled in the ceiling (12) , each communication opening at one end in the vicinity of the upper surface of the blade at the neck (6) of the channel limited by the upper surface of said blade and at the other end at a point located upstream of said grid.
3. Grille d'aubes pour turbine comportant une suite d'aubes disposées entre un plafond et un plancher définissant une suite de canaux, caractérisée en ce qu'elle comporte des communications associées aux aubes (13) et percées dans le plancher (11), chaque communication débouchant à une extrémité au voisinage de l'extrados de l'aube au niveau du col (6) du canal limité par l'extrados de ladite aube et à l'autre extrémité en un point situé en amont de ladite grille.3. Grid of blades for a turbine comprising a series of blades arranged between a ceiling and a floor defining a series of channels, characterized in that it comprises communications associated with the blades (13) and drilled in the floor (11) , each communication opening at one end in the vicinity of the upper surface of the blade at the neck (6) of the channel limited by the upper surface of said blade and at the other end at a point located upstream of said grid.
4. Grille d'aubes mobile pour turbine comportant une suite d'aubes montées sur un plancher définissant une suite de canaux, caractérisée en ce qu'elle comporte des communications associées aux aubes percées dans le plancher (21) chaque communication débouchant à une extrémité au voisinage de l'extrados de l'aube au niveau du col du canal limité par l'extrados de ladite aube et à l'autre extrémité en un point situé en amont de ladite grille.4. Movable blade grid for a turbine comprising a series of blades mounted on a floor defining a series of channels, characterized in that it includes communications associated with the blades drilled in the floor (21) each communication opening at one end at the neighborhood of the upper surface of the blade at the level of the neck of the channel limited by the upper surface of said blade and at the other end at a point situated upstream of said grid.
Grille d'aubes fixe pour turbine comportant une suite d'aubes montées sur un plafond définissant une suite de canaux, caractérisée en ce qu'elle comporte des communications associées aux aubes et percées dans le plafond (12), chaque communication débouchant à une extrémité au voisinage de l'extrados de l'aube au niveau du col du canal limité par l'extrados de ladite aube et à l'autre extrémité en un point situé en amont de ladite grille. Fixed blade grid for a turbine comprising a series of blades mounted on a ceiling defining a series of channels, characterized in that it comprises communications associated with the blades and drilled in the ceiling (12), each communication opening at one end in the vicinity of the upper surface of the blade at the neck of the channel limited by the upper surface of said blade and at the other end at a point located upstream of said grid.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7828461A FR2438157A1 (en) | 1978-10-05 | 1978-10-05 | BLADE GRILLE FOR TURBINE OR COMPRESSOR |
| FR7828461 | 1978-10-05 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0020426A1 true EP0020426A1 (en) | 1981-01-07 |
| EP0020426B1 EP0020426B1 (en) | 1983-03-09 |
Family
ID=9213367
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP79901202A Expired EP0020426B1 (en) | 1978-10-05 | 1980-04-22 | Blade grid for turbine |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US4362465A (en) |
| EP (1) | EP0020426B1 (en) |
| JP (1) | JPS55500757A (en) |
| BE (1) | BE886658A (en) |
| DE (1) | DE2964997D1 (en) |
| FR (1) | FR2438157A1 (en) |
| WO (1) | WO1980000729A1 (en) |
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| US10654987B2 (en) | 2015-12-17 | 2020-05-19 | Henkel Ag & Co. Kgaa | Titanium complexes as vulcanization catalysts |
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| ZA8234B (en) * | 1981-01-05 | 1982-11-24 | Alsthom Atlantique | A turbine stage |
| US4463552A (en) * | 1981-12-14 | 1984-08-07 | United Technologies Corporation | Combined surge bleed and dust removal system for a fan-jet engine |
| JPH0833098B2 (en) * | 1989-02-27 | 1996-03-29 | 株式会社次世代航空機基盤技術研究所 | Cascade structure of axial compressor |
| JPH0399803U (en) * | 1990-01-29 | 1991-10-18 | ||
| FR2666846B1 (en) * | 1990-09-13 | 1992-10-16 | Alsthom Gec | VANE GRILLE FOR TURBOMACHINE PROVIDED WITH SUCTION SLOTS IN THE CEILING AND / OR IN THE FLOOR AND TURBOMACHINE COMPRISING SUCH GRIDS. |
| US5382135A (en) * | 1992-11-24 | 1995-01-17 | United Technologies Corporation | Rotor blade with cooled integral platform |
| DE69936939T2 (en) | 1998-02-26 | 2008-05-15 | Allison Advanced Development Co., Indianapolis | ZAPFSYSTEM FOR A COMPRESSOR WALL AND OPERATING PROCESS |
| DE102004030597A1 (en) * | 2004-06-24 | 2006-01-26 | Rolls-Royce Deutschland Ltd & Co Kg | Turbomachine with external wheel jet generation at the stator |
| DE102008036294A1 (en) * | 2008-08-04 | 2010-02-11 | Mtu Aero Engines Gmbh | Axial compressor with compressor grille |
| DE102008052409A1 (en) | 2008-10-21 | 2010-04-22 | Rolls-Royce Deutschland Ltd & Co Kg | Turbomachine with near-suction edge energization |
| FR2958694B1 (en) | 2010-04-07 | 2014-04-18 | Snecma | ENGINE COMPRESSOR, IN PARTICULAR AIRCRAFT TURBOJET ENGINE, EQUIPPED WITH AN AIR-TESTING SYSTEM |
| JP7356285B2 (en) | 2019-07-31 | 2023-10-04 | 三菱重工業株式会社 | axial flow turbine |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR341014A (en) * | 1903-10-15 | 1904-07-27 | Georges Westinghouse | Improvements in pressurized fluid turbines |
| FR833985A (en) * | 1937-02-24 | 1938-11-08 | Rheinmetall Borsig Ag | Improvements to turbo-compressors to prevent fluid threads from detaching from the wall |
| US2291828A (en) * | 1940-05-04 | 1942-08-04 | Westinghouse Electric & Mfg Co | Turbine blading |
| DE876282C (en) * | 1942-12-22 | 1953-05-11 | Siemens Ag | Compressor with a radially loaded blade grille and boundary layer suction |
| JPS51149406A (en) * | 1975-06-18 | 1976-12-22 | Toshiba Corp | Turbine |
| JPS5254809A (en) * | 1975-10-31 | 1977-05-04 | Hitachi Ltd | Axial-flow fluid machine construction |
| JPS5254807A (en) * | 1975-10-31 | 1977-05-04 | Hitachi Ltd | Axial-flow fluid machine |
| JPS6014161A (en) * | 1983-07-06 | 1985-01-24 | Ngk Spark Plug Co Ltd | Air-fuel ratio sensor |
-
1978
- 1978-10-05 FR FR7828461A patent/FR2438157A1/en active Granted
-
1979
- 1979-10-04 US US06/196,798 patent/US4362465A/en not_active Expired - Lifetime
- 1979-10-04 DE DE7979901202T patent/DE2964997D1/en not_active Expired
- 1979-10-04 JP JP50160279A patent/JPS55500757A/ja active Pending
- 1979-10-04 WO PCT/FR1979/000090 patent/WO1980000729A1/en unknown
-
1980
- 1980-04-22 EP EP79901202A patent/EP0020426B1/en not_active Expired
- 1980-12-15 BE BE1/10075A patent/BE886658A/en not_active IP Right Cessation
Non-Patent Citations (1)
| Title |
|---|
| See references of WO8000729A1 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10654987B2 (en) | 2015-12-17 | 2020-05-19 | Henkel Ag & Co. Kgaa | Titanium complexes as vulcanization catalysts |
Also Published As
| Publication number | Publication date |
|---|---|
| WO1980000729A1 (en) | 1980-04-17 |
| EP0020426B1 (en) | 1983-03-09 |
| US4362465A (en) | 1982-12-07 |
| FR2438157B1 (en) | 1981-07-17 |
| JPS55500757A (en) | 1980-10-09 |
| FR2438157A1 (en) | 1980-04-30 |
| BE886658A (en) | 1981-06-15 |
| DE2964997D1 (en) | 1983-04-14 |
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