EP4048872A1 - Turbinenschaufel für eine stationäre gasturbine - Google Patents
Turbinenschaufel für eine stationäre gasturbineInfo
- Publication number
- EP4048872A1 EP4048872A1 EP20824139.8A EP20824139A EP4048872A1 EP 4048872 A1 EP4048872 A1 EP 4048872A1 EP 20824139 A EP20824139 A EP 20824139A EP 4048872 A1 EP4048872 A1 EP 4048872A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- coolant passage
- blade
- coolant
- turbine blade
- cooling
- 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
- F01D5/18—Hollow blades, i.e. blades with cooling or heating channels or cavities; Heating, heat-insulating or cooling means on blades
- F01D5/187—Convection cooling
-
- 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
- F01D5/18—Hollow blades, i.e. blades with cooling or heating channels or cavities; Heating, heat-insulating or cooling means on blades
- F01D5/187—Convection cooling
- F01D5/188—Convection cooling with an insert in the blade cavity to guide the cooling fluid, e.g. forming a separation wall
- F01D5/189—Convection cooling with an insert in the blade cavity to guide the cooling fluid, e.g. forming a separation wall the insert having a tubular cross-section, e.g. airfoil shape
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- 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
- F01D5/20—Specially-shaped blade tips to seal space between tips and stator
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2260/00—Function
- F05D2260/20—Heat transfer, e.g. cooling
- F05D2260/201—Heat transfer, e.g. cooling by impingement of a fluid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2260/00—Function
- F05D2260/20—Heat transfer, e.g. cooling
- F05D2260/204—Heat transfer, e.g. cooling by the use of microcircuits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2260/00—Function
- F05D2260/20—Heat transfer, e.g. cooling
- F05D2260/205—Cooling fluid recirculation, i.e. after cooling one or more components is the cooling fluid recovered and used elsewhere for other purposes
Definitions
- the invention relates to a turbine blade according to the Oberbe handle of claim 1.
- Turbine blades of gas turbines are subject to the highest thermal and mechanical loads during operation, which is why they are nowadays designed to be cool and particularly robust with the help of complex, hollow internal geometries.
- a gas turbine blade corresponding to the preamble of claim 1 is known from WO 1996/15358 A1, in which cooling air introduced tangentially into a leading edge cooling channel enables the leading edge to be cooled without further film cooling holes in it English often referred to as showerhead holes, which are required to cool.
- showerhead holes which are required to cool.
- a significant proportion of the cooling air flowing in the leading edge cooling duct is released from the turbine blade via film cooling holes, also known as gill holes, located in the suction side near the leading edge, whereas the remaining proportion of this cooling air is released below the blade tip Trailing edge is guided.
- the remaining part of the airfoil is cooled via a serpentine cooling duct followed by a rear edge blow-out.
- a so-called multi-layer turbine blade is known from WO 2017/039571 A1, which is also referred to in English as a “multiwall turbine blade”.
- two displacement bodies are provided, with which the cooling air flowing inside the turbine blade is particularly important
- An alternative embodiment of a multiwall turbine blade is also shown in EP 1783 327 A2.
- US 2010/0239431 A1 shows a turbine blade with - based on the span - two adjacent meander cooling channels, which are switched in series via a channel cooling the leading edge.
- the object of the invention is consequently to provide a long-lasting turbine blade with a further reduced consumption of coolant.
- the present invention proposes a turbine blade for a stationary gas turbine, in particular for one of its high-pressure turbine stages, with a cooling system arranged in its interior, which has a first cooling path for comprises a first coolant flow and a second cooling path, which is substantially, preferably completely separate, from the first cooling path for a second coolant flow, in which the first cooling path comprises a first coolant passage which is set up for cyclone cooling of the leading edge and a second coolant passage adjoining the first coolant passage which extends below the blade tip from the leading edge in the direction of the trailing edge, the second cooling path being a serpentine coolant passage for cooling a central region of the airfoil arranged in the chord direction behind the leading edge region s and a first trailing edge coolant passage for at least partial cooling of an ordered trailing edge area of the airfoil that extends to the trailing edge behind the central area, the first trailing edge coolant passage having a plurality of first ones
- the first cooling path further comprises: a third coolant passage adjoining the second coolant passage, which mainly extends radially inward, and a second trailing edge coolant passage adjoining the third coolant passage, which is used to cool a region of the blade tip Rear edge area is designed and is fluidically connected to a plurality of two th exit holes arranged in the rear edge.
- the invention is based on the knowledge that a significant saving in coolant for cooling the turbine blade can only be achieved if the leading edge and / or the pressure-side wall and / or the suction-side side wall of the airfoil do not have any openings through which coolant can flow out and there can flow into a hot gas flowing around the turbine blade.
- the coolant escapes at least at the rear edge and possibly also through the blade tip pointing outwards. In this respect, only those passages and channels with which the leading edge and a large part of the pressure sides and suction sides of the airfoil can be cooled should be set up for locally closed cooling.
- neither showerhead holes nor gill holes nor other film cooling holes branch off from the first coolant passage and / or from the serpentine coolant passage; these are free of exit holes. Exit holes are only provided at the rear edge and possibly in the blade tip. A locally closed cooling is not understood to mean that no coolant at all may escape into the hot gas from the blade.
- the first coolant flow used for the leading edge cooling also be used for the cooling of a radially outer part of the trailing edge region of the airfoil.
- a rear separating rib is introduced into the system according to the invention, which redirects the coolant coming from the forward-flowing system inwards and finally to another rear edge Coolant passage leads.
- the first coolant flow via a second coolant passage, which extends directly below the blade tip to the rear end of the airfoil, and via an adjoining third coolant passage to preferably about half the height of the rear edge, to then in a radially outwardly arranged Trailing edge coolant passage there to be used usefully. Because of this solution, the requirement for cooling air for the second flow path can be significantly reduced.
- the approach proposed here offers a maximum benefit of the available cooling means due to a novel division and using a cooling concept, namely the cyclone cooling, which or for turbine blades of the first and / or second turbine stage of gas turbines with comparatively high compressor pressure ratios or High turbine inlet temperatures have hitherto been viewed as completely unsuitable and have therefore not been taken into account for their turbine blades.
- Cyclone cooling is to be understood as such a type of cooling in which substantial proportions of the cooling medium flowing in a cooling channel or in a coolant passage flow in a twisted manner from a main inlet for the coolant to a main outlet. Twisted means that the essential part of the cooling medium flows along the relevant channel or passage in a helical or helical manner.
- the twisted flow is to be distinguished from a turbulent flow. The latter is regularly caused by so-called turbulators and consequently occurs in spatially very limited areas, as only a very small proportion of the coolant is reached and manipulated by the turbulators. After leaving the area in question, the turbulence then disintegrated again.
- a twisted main flow in locally very small areas can also have turbulent secondary flow components, but not vice versa.
- the consumption of coolant can be reduced to an extent that cannot be expected in advance while at the same time providing adequate cooling of the entire blade. According to detailed simulations, this even applies to turbine blades that are installed in one of the two front turbine stages of a stationary gas turbine with a turbine inlet temperature of 1300 ° C and higher at ISO nominal operation or with a compressor pressure ratio of 19: 1 or higher. Even with such turbine blades, the amount of coolant could be reduced by about 30% compared to a conventional one with cooling holes arranged in the leading edge, while achieving the same service life.
- one or more outlet holes for coolant which are fluidically connected to the second coolant passage, are arranged in the blade tip. This measure improves the fatigue strength of any rubbing edges protruding from the blade tip.
- the first cooling path comprises a supply passage for the first coolant passage, which is arranged immediately next to the first coolant passage and is fluidically connected to the first coolant passage via a large number of openings, extending at least over a large part of the span of the blade, whereinthe passage openings have means to impart a swirl to the coolant flowing in the first coolant passage or to increase it.
- the passage openings have a special alignment on. If, for example, the through-openings open tangentially, i.e.
- the coolant flowing in the first coolant passage can be used for cyclone cooling with simple means Imprint or reinforce the required twist. Efficient cyclone cooling of the leading edge can thus be provided comparatively easily.
- cyclone cooling of the leading edge that is adapted or homogenized over the height of the blade can be achieved in that a density of passage openings that can be determined in the spanwise direction is greatest at the base end, and preferably decreases gradually or continuously towards the tip of the blade. This allows the flow velocity in the first coolant passage to be kept almost constant over the span of the blade, which can also be achieved through a first coolant passage tapering in cross section to the blade tip.
- a plurality of preferably rib-shaped, in particular inclined, turbulators are arranged on one or more inner surfaces of one or moredemit telpassagen in order to locally further increase the heat transfer into the first and / or seconddemit tel and / or around the swirl to support.
- a plurality of sockets arranged in a pattern, ie in several rows, is provided in each trailing edge coolant passage.
- This allows a suction-side and pressure-side trailing edge area of the airfoil, which adjoins the central area of the airfoil and extends to the rear edge of the airfoil, in a simple and efficient manner without outlet holes, ie locally closed cool.
- the division of the cooling means for the two cooling paths and the pressure losses occurring therein can also be efficiently adjusted.
- two cooling channel arms which widen the second coolant passage are provided, which widen radially inward with increasing extension in the direction of the chord and open out in the third coolant passage.
- a partition is arranged between the second coolant passage and the serpentine coolant passage, which connects the two side walls to one another and extends in the direction of the chord, wherein the partition forms a displacement wedge, preferably tapering to a point, as it approaches the rear edge, which, in conjunction with the inner surfaces of the two side walls, laterally delimits the two cooling channel arms.
- a rear separating rib extending in the spanwise direction is provided between the third coolant passage and the second rear edge coolant passage. If necessary, one or more holes can also be present in the rear separating rib in order to prevent local dead water areas in the second rear edge coolant passage.
- the trailing edge has a normalized height of 100%, starting at its root end at 0% and ending at the blade tip at 100%, the two trailing edge coolant passages at least from a separating rib that extends mainly in the direction of the chord are essentially separated from one another, which is arranged at a height between 45% and 75% of the normalized height.
- this enables a particularly efficient division of the total available amount of coolant to be achieved, with which, on the one hand, homogeneous cooling of the blade and, on the other hand, a further reduced coolant consumption per se can be achieved.
- the cast cores required for casting the turbine blade which are later left behind by the two rear trailing edge coolant passages, and to avoid core breakage, it is helpful if these cast cores are directly connected to one another via a few supports. Although then leave the supports in the finished turbine blade openings in the partition rib, which cancels the full separation of the two trailing edge cooling channels, but the two trailing edge cooling channels are still essentially separated from each other.
- the serpentine coolant passage comprises at least two channel sections extending in the spanwise direction and at least two reversal sections that alternate, the reversal section further downstream in the coolant flow with the first trailing edge coolant passage is directly connected fluidically.
- the two channel sections by means of a displacement body and by means of the two side walls in a cross-sectional view of the blade are each essentially C-shaped with a Suction-side channel arm, a pressure-side channel arm and a connecting arm connecting the two channel arms are designed and arranged to one another in such a way that they almost completely surround the displacement body.
- a turbine blade configured as a multiwall can be provided. Due to the design as a multiwall, it is on the one hand possible to produce a blade that has a relatively small curvature at the leading edge even with low consumption of resources. This slight curvature is of course very beneficial to the swirl generation in the first coolant passage.
- the cooling sections can have comparatively small flow cross-sections.
- the second coolant stream then flows through the channel sections or through the serpentine coolant passage at a sufficiently high speed and thus with the formation of a sufficiently high heat transfer.
- This in particular reduces the amount of coolant required for efficient cooling of the central area of the airfoil between the leading edge and trailing edge area.
- consumption can be reduced by about a further 40%, which means that the thermal efficiency of the turbine blade can then be brought comparatively close to the theoretical maximum.
- the displacement body engages around a cavity in a cross-sectional view and is supported by webs on the two side walls.
- the cavity cannot be flowed through by coolant, since it has no outlet opening for coolant.
- the turbine blade according to the invention is preferably cast, with an opening which is present in the blade root after the casting of the turbine blade and which is in direct, i.e. immediate connection with the cavity, is closed by a separately produced cover plate.
- an opening which is present in the blade root after the turbine blade has been cast and which is in direct, i.e. immediate connection, with the first trailing edge coolant passage Preferably, egg ne such is also closed by a separately produced cover plate from the opening in question is attached to the blade root so that it completely covers it.
- one or more inlets are provided for each cooling path, which are fluidically connected with the first coolant passage or the supply passage or with the serpentine coolant passage or one of its channel sections.
- the turbine blade preferably has an aspect ratio of a trailing edge span based on a chord length to be detected at the foot end, which is 3.0 or less, since it has been found that the proposed division of the available coolant into two preferably from each other separate coolant flows and the at the same time proposed division of the cooling of the trailing edge area, especially for such turbine shoveling allows a considerable saving in the amount ofmémit tel.
- the turbine blade described above can be used both as a rotor blade attached to a rotor or as a guide blade attached to a static carrier.
- the turbine blade described above can also be used in a first or second turbine stage of a stationary gas turbine that has a turbine inlet temperature of at least 1300 ° C and / or a compression ratio of 19: 1 or at ISO nominal operation has larger.
- a turbine inlet temperature of at least 1300 ° C and / or a compression ratio of 19: 1 or at ISO nominal operation has larger.
- aero derivatives do not fall under the definition of stationary gas turbines.
- the invention is therefore not only suitable for those stationary gas turbines whose hot gas temperatures at the turbine inlet are viewed as comparatively low by today's standards.
- Figure 1 is a side view of a turbine runner blade according to a first embodiment
- FIG. 2 shows the cooling scheme of the turbine blade according to FIG. 1
- FIG. 3 shows the longitudinal section through the turbine blade according to the first exemplary embodiment
- FIG. 4 shows a cross section through the turbine rotor blade according to FIG. 3 along the section line A-
- Figures 5 7 longitudinal sections through the turbine blade according to Figure 3 along the section lines B-B, C-C and D-D,
- FIG. 8 shows a cross section through the turbine rotor blade according to FIG. 1 along the section line E-E and
- FIG. 9 shows a schematic representation of a stationary gas turbine.
- FIG. 1 shows a turbine blade 10 in a side view.
- the turbine blade 10 preferably produced in an investment casting process includes a blade foot 12 shown only in the approach.
- the blade foot 12 can be designed in a known manner in a dovetail shape or a Christmas tree shape. This is followed by a platform 13, from which a blade 18 extends in the spanwise direction R from a foot-side end 20 to a blade tip 22.
- the turbine rotor blade 10 is installed in a gas turbine through which there is an axial flow, the spanwise direction and the radial direction of the gas turbine coincide.
- an aspect ratio HSP / SL of a trailing edge span HSP based on a chord length SL to be detected at the foot end is 1.9 and is preferably in the range between 1.5 and 3.
- Outlet openings 28 likewise open out on a lateral surface of the platform 13.
- the outlet holes 46, 56 and the outlet openings 28 are in flow connection with an inner cooling system of the turbine rotor blade 10.
- the cooling system of the turbine blade 10 and in particular of the blade 18 is shown schematically in FIG. 2 as a cooling scheme.
- a first coolant flow M1 and a second coolant flow M2 can be fed separately to the turbine rotor blade 10.
- the first coolant flow Ml flows through a first cooling path 30, which is composed of several coolant passages 31, 32, 33, 34, 36a, 36b, 38, 40, 44 together. Downstream of an input (not shown in FIG. 2)
- a supply passage 31 follows for the coolant flow Ml, which is in flow connection with a first coolant passage 32 via a plurality of passage openings 33.
- the first coolant passage 32 is used for cyclone cooling of the leading edge 24 of the blade 18 and the immediately adjoining leading edge area 39.
- the first coolant passage 32 merges into a second coolant passage 34, which is used to cool the blade tip 22
- the leading edge 24 extends over a comparatively large chord length of the blade tip 22 in the direction of the trailing edge 26.
- third outlet holes 67 can be arranged for cooling of rubbing edges explained later.
- the second coolant passage 34 also comprises two cooling channel arms 36a, 36 which only begin in the second half of the second coolant passage 34 and which, like the downstream end of the second coolant passage 34, are connected to a third coolant passage 38.
- the latter is fluidically connected via a Umledgeab 40 to a second trailing edge coolant passage 44.
- the coolant flow Ml flowing through the first cooling path 30 can then leave the turbine rotor blade 10 at its rear edge 26 via a large number of second outlet holes 46.
- a second cooling path 50 is arranged parallel to the first cooling path 30 and preferably completely separated from it in terms of flow, which has a serpentine coolant passage 52 downstream of an inlet not shown in further detail in FIG.
- the serpentine coolant passage 52 comprises for cooling a central region 48 (FIG. 1) according to this exemplary embodiment two channel sections 55a, 55b which extend in the spanwise direction and which are connected to one another via a reversing section 57a arranged between them.
- a second reversal section 57b connects, which fluidically connects the second Kanalab section 55b with a first trailing edge coolant passage 54.
- the coolant flow M2 flowing through the second cooling path 50 can then, via a plurality of first outlet holes 46, the turbine running Schaufei 10 leave at their rear edge 26.
- Both trailing edge coolant passages 44, 54 serve to cool a trailing edge region 59 (FIG. 1).
- FIG. 3 shows, as a longitudinal section, an inner structure of the turbine rotor blade 10 according to FIG. 1, which is configured to correspond to the cooling scheme according to FIG.
- the turbine blade 10 comprises a number of walls and ribs arranged differently, which separate the individual cooling paths and coolant passages from one another.
- the look fuselage 12 two inlets 80 for the two coolant flows M1 and M2 or for the two cooling paths 30, 50 are provided. Between the two inlets 80 there is a front support rib 66v which connects the two side walls 14, 16 to one another and separates the first cooling path 30 from the second cooling path 50 for a first section.
- a front separating rib 49v also separates the supply passage 31 from the first coolant passage 32, a plurality of passage openings 33 (detail to FIG. 4) being arranged in the front separating rib 49v.
- a greater density of passage openings 33 is provided in the area close to the platform than in the area close to the tip.
- the position and the orientation of the passage openings 33 in the front separating rib 49v is selected such that a comparatively strongly swirled coolant flow can arise in the first coolant passage 32.
- a swirled coolant flow is to be understood as one which can form cyclone-like or analogously to a helical line or a helix from the foot-side end 20 to the blade tip 22. They are therefore arranged eccentrically in the front separating rib 49v and in particular aligned with the inner walls of the suction side wall 16 (or pressure side wall), possibly even at an incline towards the blade tip 22 in order to at least partially compensate for the weakening of the swirl when flowing through the first coolant passage 32 .
- the outer end of the first coolant passage 32 is followed by the second coolant passage 34 for cooling a bottom 37 of the blade tip 22, the second coolant passage 34 being separated from the serpentine coolant passage 52 by a partition 60.
- the third coolant passage 38 connects, which extends from the blade tip 22 in the direction of the root end 22, but only up to half the height of the blade 18, the height of the blade 18 at the trailing edge 26 is to be recorded.
- This is followed by a further reversal section 40, by means of which the first coolant flow Ml can be fed to the second trailing edge coolant passage 44.
- the third coolant passage 38 is largely separated from the second rear edge coolant passage 54 by a correspondingly configured rear separating rib 49h.
- bases 53 around which the coolant Ml can flow are arranged one behind the other in several rows.
- the bases are designed more like a racetrack with comparatively narrow passages in order to bring about the highest possible pressure loss.
- the first cooling path 30 ends in second outlet holes 46 provided in the rear edge 26, through which at least a large part of the coolant flow Ml supplied through the associated inlet 80 can be released from the turbine rotor blade 10.
- the second cooling path 50 for guiding the second coolant flow M2 and essentially comprises the serpentine coolant passage 52 and the first trailing edge coolant passage 44.
- the former can be divided into four successive sections, the first of which is referred to as the first channel section 55a. This is followed by a first reversal section 57a, a second channel section 55b and a second reversal section 57b.
- the latter connects the serpentine coolant passage 52 with the second trailing edge coolant passage 54, which is analogous to the first trailing edge coolant passage 44 arranged in several rows, racetrack-shaped sockets 53 is designed.
- the two channel sections 55a, 55b of the serpentine coolant passage 52 extend along the span direction R over a large part of the airfoil 18.
- the first channel section 55a and the second channel section 55b are, as additionally shown in FIG. 4, essentially U-shaped each with a duct arm 55as, 55bs arranged on the suction side, a duct arm 55ad, 55bd arranged on the pressure side and one of the respective duct arms connecting the connecting arm 55av, 55bv. Accordingly, the first duct section 55a is surrounded by the pressure-side side wall 14, by the front support rib 66v, by the suction-side side wall 16 and a displacement body 70 arranged in the interior - in cross section according to FIG. 4.
- the second Kanalab section 55b is surrounded by the pressure-side side wall 14, by a rear support rib 66h, by the suction-side side wall 16 and the displacement body 70 arranged in the interior.
- the displacement body 70 itself engages around a cavity 72 and is supported on the pressure-side Be tenwand 14 and the suction-side side wall 16 via webs 71.
- the webs 71 extend approximately over the entire height of the blade 18 and serve on the one hand for monolithic fastening of the displacement body 70 in the turbine blade 10 and on the other hand for separating the two duct sections 55, 57.
- the displacement body 72 is trimmed on the rear edge side at its radially outer end. This measure improves the mechanical integrity of the turbine rotor blade 10 and, in particular, its vibration resistance.
- the two trailing edge coolant passages 44, 54 are separated from one another by a separating rib 64 that extends mainly in the chordal direction S, at least for the most part, if not completely. According to the gameliensbei the separating rib 64 ends at a height of 55% normalized blade height of the trailing edge 24. The separating rib 64 is preferably arranged at a height between 45% and 75% of the normalized height.
- FIGS. 5 to 7 show sections through the tip of the turbine rotor blade 10 according to the three cutting lines B-B, C-C and D-D from FIG. 3.
- rubbing edges 78 are provided on both the suction side and the pressure side.
- the displacement body 70 is not closed at its radially outer end, but rather is open towards the first reversing section 57a. In this respect, an inflow of the seconddemit telflow M2 would be possible.
- a cover plate 76a (FIG. 1) attached there after the casting, the cavity 72 is applied to outlet openings.
- FIGS. 5 to 7 show how the dividing wall 60 forms a tapered displacement wedge 62 as it approaches the rear edge 24 which, in conjunction with the inner surfaces of the two side walls 14, 16, forms the two
- Limiting cooling channel arms 36a and 36b each laterally.
- the support of the displacement body 70 can be compensated, so that the coolant flow M2 can continue to be routed close to the side wall in the trimmed area and thus it can be efficiently cooled. If the support of the displacement body is not absolutely necessary, the size of the displacement reduction wedge. If necessary, it can even be dispensed with entirely.
- FIG. 8 shows, in a view directed towards the blade tip 22 - that is, outward - a cross section of the downstream half of the blade tip 22 according to section line E-E from FIG.
- a channel section on the blade root side can be provided, which can represent an extension of the first coolant passage 32 to the underside of the blade root 12.
- suitable swirl generators for example spiral ribs, can be provided which twist the coolant flow Ml in a cyclonic manner when it flows through the channel section on the blade root side.
- the first coolant passage 32 would be separated from the connecting channel 55av by the front support rib 66v, so that the passage opening 33 arranged in the front support rib 66v could promote a refreshing or amplification of the swirl impulse.
- FIG. 9 shows only schematically a gas turbine 100 with a compressor 110, a combustion chamber 120 and a turbine unit 130.
- a generator 150 for generating electricity is coupled to a rotor 140 of the gas turbine.
- the compressor 110 is designed in such a way that, during operation under ISO standard conditions, it can generate a pressure ratio of compressed ambient air VL to ambient air L drawn in of 19: 1 or greater.
- the compressed air VL is then mixed with a fuel F and burned to a hot gas HG.
- Combustion chamber 120 and turbine unit 130 are designed in such a way that the hot gas HG flowing at the exit of the combustion chamber 120 or the entry of the turbine unit 130 has a temperature of at least 1300 ° C. under ISO standard conditions, the rotor and guide vanes in the first turbines stage or the second turbine stage are designed in the manner described here.
- the hot gas HG expanded in the turbine unit 130 leaves it as flue gas RG.
- a turbine blade 10 with a blade root 12 and a blade 18 is proposed with the invention, which extends along a span direction R from egg nem base end 20 to a blade tip 22 and ent long a tendon direction S arranged transversely to the span direction R from a leading edge 24 extends to a trailing edge 26, with a first cooling path 30 for a first coolant flow Ml and a second cooling path 50 for a second coolant flow M2 being designed in the interior of the blade 18, the first cooling path 30 being a first cooling medium passage 32 which leads to cyclone cooling of the leading edge 24 is set up and a second coolant passage 34 adjoining the first coolant passage 32 and extending below the blade tip 22 from the leading edge 24 in the direction of the trailing edge 26, the second cooling path 50 being a serpentine coolant passage 52 for cooling one behind in the tendon direction the leading edge area 39 of the airfoil 18 and a first trailing edge coolant passage 54 for at least partial cooling of a trailing edge area 59 of the airfoil 18
- the first coolant passage 32 and / or the serpentine coolant passage 52 be directed for a locally closed cooling and the first cooling path 30 is a third coolant passage 38 that adjoins the second coolant passage 34 and extends mainly radially inward It stretches as well as a second trailing-edge coolant passage 44 adjoining the third coolant passage 38, which is designed to cool a region of the trailing edge area 59 on the blade tip side and with a plurality of second outlet holes 46 arranged in the trailing edge 26 in terms of flow connected is.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP19214178.6A EP3832069A1 (de) | 2019-12-06 | 2019-12-06 | Turbinenschaufel für eine stationäre gasturbine |
| PCT/EP2020/084603 WO2021110899A1 (de) | 2019-12-06 | 2020-12-04 | Turbinenschaufel für eine stationäre gasturbine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP4048872A1 true EP4048872A1 (de) | 2022-08-31 |
| EP4048872B1 EP4048872B1 (de) | 2024-01-31 |
Family
ID=68834961
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19214178.6A Withdrawn EP3832069A1 (de) | 2019-12-06 | 2019-12-06 | Turbinenschaufel für eine stationäre gasturbine |
| EP20824139.8A Active EP4048872B1 (de) | 2019-12-06 | 2020-12-04 | Turbinenschaufel für eine stationäre gasturbine |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19214178.6A Withdrawn EP3832069A1 (de) | 2019-12-06 | 2019-12-06 | Turbinenschaufel für eine stationäre gasturbine |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US12006838B2 (de) |
| EP (2) | EP3832069A1 (de) |
| JP (1) | JP7608460B2 (de) |
| KR (1) | KR102749388B1 (de) |
| CN (1) | CN114787482B (de) |
| WO (1) | WO2021110899A1 (de) |
Family Cites Families (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5603606A (en) | 1994-11-14 | 1997-02-18 | Solar Turbines Incorporated | Turbine cooling system |
| US6220817B1 (en) * | 1997-11-17 | 2001-04-24 | General Electric Company | AFT flowing multi-tier airfoil cooling circuit |
| US5997251A (en) * | 1997-11-17 | 1999-12-07 | General Electric Company | Ribbed turbine blade tip |
| DE10053356A1 (de) | 2000-10-27 | 2002-05-08 | Alstom Switzerland Ltd | Gekühltes Bauteil, Gusskern für die Herstellung eines solchen Bauteils, sowie Verfahren zum Herstellen eines solchen Bauteils |
| US7104757B2 (en) * | 2003-07-29 | 2006-09-12 | Siemens Aktiengesellschaft | Cooled turbine blade |
| US7300250B2 (en) | 2005-09-28 | 2007-11-27 | Pratt & Whitney Canada Corp. | Cooled airfoil trailing edge tip exit |
| US7744347B2 (en) | 2005-11-08 | 2010-06-29 | United Technologies Corporation | Peripheral microcircuit serpentine cooling for turbine airfoils |
| US7845908B1 (en) | 2007-11-19 | 2010-12-07 | Florida Turbine Technologies, Inc. | Turbine blade with serpentine flow tip rail cooling |
| US7988419B1 (en) | 2008-12-15 | 2011-08-02 | Florida Turbine Technologies, Inc. | Turbine blade with serpentine flow cooling |
| US8118553B2 (en) * | 2009-03-20 | 2012-02-21 | Siemens Energy, Inc. | Turbine airfoil cooling system with dual serpentine cooling chambers |
| CN103080477B (zh) | 2010-06-23 | 2015-08-12 | 西门子公司 | 燃气涡轮叶片 |
| US8628298B1 (en) * | 2011-07-22 | 2014-01-14 | Florida Turbine Technologies, Inc. | Turbine rotor blade with serpentine cooling |
| US20130224019A1 (en) * | 2012-02-28 | 2013-08-29 | Solar Turbines Incorporated | Turbine cooling system and method |
| EP2682565B8 (de) | 2012-07-02 | 2016-09-21 | General Electric Technology GmbH | Gekühlte Schaufel für eine Gasturbine |
| US9376921B2 (en) | 2012-09-25 | 2016-06-28 | Pratt & Whitney Canada Corp. | Internally cooled gas turbine engine airfoil |
| US8920123B2 (en) | 2012-12-14 | 2014-12-30 | Siemens Aktiengesellschaft | Turbine blade with integrated serpentine and axial tip cooling circuits |
| EP2853689A1 (de) | 2013-09-25 | 2015-04-01 | Siemens Aktiengesellschaft | Anordnung von Kühlkanälen in einer Turbinenschaufel |
| KR101509385B1 (ko) * | 2014-01-16 | 2015-04-07 | 두산중공업 주식회사 | 스월링 냉각 채널을 구비한 터빈 블레이드 및 그 냉각 방법 |
| CN106715834B (zh) | 2014-09-18 | 2019-01-08 | 西门子公司 | 燃气涡轮发动机中的翼型及用于形成这种翼型的芯部结构 |
| CN107109949A (zh) | 2014-11-11 | 2017-08-29 | 西门子公司 | 带有轴向叶顶冷却回路的涡轮叶片 |
| US10494931B2 (en) | 2015-08-28 | 2019-12-03 | Siemens Aktiengesellschaft | Internally cooled turbine airfoil with flow displacement feature |
| US9745853B2 (en) * | 2015-08-31 | 2017-08-29 | Siemens Energy, Inc. | Integrated circuit cooled turbine blade |
| WO2017171763A1 (en) | 2016-03-31 | 2017-10-05 | Siemens Aktiengesellschaft | Turbine airfoil with turbulating feature on a cold wall |
| US10174622B2 (en) * | 2016-04-12 | 2019-01-08 | Solar Turbines Incorporated | Wrapped serpentine passages for turbine blade cooling |
-
2019
- 2019-12-06 EP EP19214178.6A patent/EP3832069A1/de not_active Withdrawn
-
2020
- 2020-12-04 CN CN202080084589.1A patent/CN114787482B/zh active Active
- 2020-12-04 US US17/780,670 patent/US12006838B2/en active Active
- 2020-12-04 KR KR1020227022611A patent/KR102749388B1/ko active Active
- 2020-12-04 EP EP20824139.8A patent/EP4048872B1/de active Active
- 2020-12-04 WO PCT/EP2020/084603 patent/WO2021110899A1/de not_active Ceased
- 2020-12-04 JP JP2022532872A patent/JP7608460B2/ja active Active
Also Published As
| Publication number | Publication date |
|---|---|
| KR20220103799A (ko) | 2022-07-22 |
| US12006838B2 (en) | 2024-06-11 |
| JP2023505451A (ja) | 2023-02-09 |
| CN114787482A (zh) | 2022-07-22 |
| EP3832069A1 (de) | 2021-06-09 |
| JP7608460B2 (ja) | 2025-01-06 |
| US20230358142A1 (en) | 2023-11-09 |
| WO2021110899A1 (de) | 2021-06-10 |
| EP4048872B1 (de) | 2024-01-31 |
| KR102749388B1 (ko) | 2025-01-03 |
| CN114787482B (zh) | 2024-04-09 |
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