EP1015736B1 - Turbinenschaufel sowie verwendung einer turbinenschaufel - Google Patents
Turbinenschaufel sowie verwendung einer turbinenschaufel Download PDFInfo
- Publication number
- EP1015736B1 EP1015736B1 EP98954146A EP98954146A EP1015736B1 EP 1015736 B1 EP1015736 B1 EP 1015736B1 EP 98954146 A EP98954146 A EP 98954146A EP 98954146 A EP98954146 A EP 98954146A EP 1015736 B1 EP1015736 B1 EP 1015736B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- turbine blade
- slot
- wall
- blade according
- outlet
- 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 - Lifetime
Links
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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
- F01D5/186—Film 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
- F01D5/141—Shape, i.e. outer, aerodynamic form
Definitions
- the invention relates to a turbine blade that runs along a Main axis is directed and has a wall structure, wherein the wall structure has an interior for guiding cooling fluid surrounds an outer wall with an outer surface and includes an inner surface facing the interior and has an outlet for cooling fluid.
- the invention relates continue to use such a turbine blade.
- a gas turbine vane with a guide from Cooling gas for cooling them is described in US Pat. No. 5,419,039.
- the guide vane is designed as a casting or composed of two castings. It has an interior to supply cooling air from the compressor Gas turbine on. Your exposed to the hot gas flow of the gas turbine, has the wall structure surrounding the air supply a load-bearing inner wall with a largely constant thickness, on which outlets for cooling air are arranged.
- Such a Outlet is as a cool bag located on the inner wall running a cavity with an outlet opening has, which is referred to as a slot.
- the cavity is formed by a pocket cover attached to the inner wall, the inner wall and / or the pocket cover so are designed so that between them the cavity with the Exit opening remains.
- the inner wall is flat and the pocket cover is curved.
- the inner wall a curvature facing the interior, so that in the curvature a depression is formed.
- the cavity is in the curvature Cooling bag between the inside wall and the bag cover educated.
- the pocket cover made in one piece with the inner wall as a casting.
- the cooler bags are both in the direction of flow of the hot gas as well as perpendicular to the flow direction of the hot gas arranged along the main direction of expansion of the guide vane.
- the blade surface is therefore of a plurality formed by pocket covers.
- the cavities are each through which cooling air can be supplied via the air supply, that at the outlet opening into the flow of hot gas emerges and a cooling air film on the blade surface through which the blade surface is cooled.
- the object of the invention is to provide a turbine blade with a specify coolable wall structure. There is another task in using such a turbine blade specify.
- Cooling fluid in particular cooling air
- the thickening facing the interior increases stability the outer wall, so that they are very thin can, which improves the cooling effect.
- the slot preferably extends over a depth of penetration into the outer wall without penetrating it. Thereby the stability of the outer wall is further increased.
- the slot preferably extends over the entire depth of penetration a constant cross section. This makes it production-related easy to manufacture.
- the slot is preferably oriented parallel to the main axis. This has the advantage that when the turbine blade is used in a gas turbine, which gas turbine from one Hot gas is flowed through, the cooling fluid in the direction of flow of the hot gas emerges.
- the outer wall is preferably made particularly thin. This results in particularly effective cooling. Because of the thickening, even an extremely thin one Outside wall for the outlet a large length-diameter ratio given and a small angle of inclination of the outlet realizable in relation to the outer wall.
- the slot of the outlet is preferably pointed Angle ⁇ , in particular between 10 ° and 45 °, with respect to Outside wall inclined.
- cooling air is drawn through the interior the turbine blade flows, warms and passes through the Outlet, which is designed as a slot on the outer surface is in a flow of a flowing around the turbine blade Fluids, especially a hot gas.
- the slot of the outlet is for use of the turbine blade in a gas turbine, preferably directed along an axis, opposite the direction of flow of the fluid around the acute angle ⁇ is inclined. This ensures that cooling air flowing out of the outlet, which is proportional cool to the fluid, especially a hot gas, is forming a cold film of cooling fluid around the turbine blade. This effectively protects the turbine blade at.
- the area of the outlet on the inner surface is preferred designed as a depression, in particular as a blind hole, which are introduced into the thickening in the area of the outlet is.
- the slot cuts the recess, thereby the outlet is formed. This allows the slot and recess composite outlet manufacturing technology just be made.
- the thickening on the outer wall is preferred formed as a linear increase along the slot.
- the thickening can contain several depressions.
- the cross section of the depression is preferably smaller than the cross section of the slot. This forms the recess a choke area and the slot an expanding one Deceleration area.
- the throttle range is in essentially a quantity control of the cooling fluid flow achievable. Due to the widening slowdown range a reduction in the flow rate of the cooling fluid accessible so that this is immediately downstream of the outlet can lay on the outer wall.
- the cross section of the recess is smaller than the cross section of the slot is further, the stability of the outer wall improved because the outer wall only about the diameter of the recess and not penetrated over the entire slot length becomes.
- the height H of the slot is preferably (slot height H) and the diameter D of the depression of the same order of magnitude, especially in the range between 0.5 mm and 1 mm.
- the Length of the slot L is preferably in Range between 1 cm and 3 cm.
- the distance between the Slitting in the direction of the main axis is preferably in the range between 0.5 cm and 2 cm.
- the task aimed at using the turbine blade is solved in that the turbine blade as a moving blade or guide vane in a gas turbine plant, in particular in a gas turbine in the temperatures of significantly above 1000 ° C of the hot gas flowing around the turbines, is used.
- Such a turbine blade is preferably suitable for the Use in a gas turbine, the turbine blade from a hot gas flows around. At a temperature of the hot gas, those above the melting temperature of the base material the turbine blade is located by one with the turbine blade achievable cooling a failure of the turbine blade avoided.
- the temperature on the outer wall, the surface temperature is through film cooling as well as cooling over the interior to a non-critical one for the turbine blade Temperature level lowered. Cooling air from the interior leads to a convective transition and heat conduction through the outer wall, creating the surface the outer wall can be cooled sufficiently.
- the turbine blade 1 shows a turbine blade directed along a main axis 2 1 of a gas turbine shown.
- the turbine blade 1 has a wall structure 3, which has an interior 4 surrounds for guiding cooling fluid 5, which is not shown in FIG Subareas is divided.
- the wall structure 3 has an outer wall 6 with an outer surface 7 and one the inner surface 8 facing the interior 4.
- the outer wall 6 has a plurality of thickenings directed towards the interior 4 11 on. For the sake of clarity, it is only one Thickening 11 shown.
- the thickening 11 is a recess 12, which is designed as a blind hole, brought in.
- the outer wall 6 in the area of Thicken 11 on a slot 10 the depression 12th cuts.
- the recess 12 and the slot 10 together form an outlet 9. This allows one in the interior 4 led cooling fluid 5, cooling air, from the interior 4 to flow through the thickening 11 to the outer surface 7. Outside the turbine blade 1, the cooling air mixes 5 with the flow 13 of a flowing around the turbine blade 1 Hot gas.
- the outlet 9 shown in FIG. 1 is enlarged in FIG shown.
- the slot 10 with a slot height H penetrates an acute angle ⁇ over a depth of penetration E into the outer wall 6 and cuts the recess 12, the one Has diameter D.
- the slot 10 and the recess 12 thus form the outlet 9. Characterized in that the slot 10 the has an acute angle ⁇ , it is achieved that the cooling air 5 immediately downstream of the outlet 9 to the outer wall 6 creates and thus effective film cooling of the outer wall 6 causes.
- the choice of the diameter D can regulate the flow rate for the cooling fluid 5 be made.
- FIG 3 shows a turbine blade 1 of a gas turbine in the Top view of the outer wall 6 (see FIG 1) is shown schematically.
- the Flow 13 (see FIG. 1) has the direction of flow 14.
- a plurality of slots 10 are along the major axis 2 arranged in a row. Several rows are adjacent in the direction perpendicular to the main axis 2 on the Outer surface 7 of the turbine blade 1.
- the slots in one Row have a slot length 11, which is in the range between 1 cm and 3 cm. The distance between two slots a row is in the range between 0.5 cm and 2 cm.
- the slots in a row are compared to the slots a directly adjacent row offset in the main axis direction arranged. This has the advantage that the areas between the slots of one row with the cooling air, the from the slots the opposite the flow direction 14 the flow 13 (see FIG 1) directly adjacent Row emerges, are cooled. This will cool the film the entire outer surface 7 guaranteed.
- the invention is characterized by a turbine blade a wall structure in which one is exposed to hot gas Outer wall has an outlet on the outer surface the outer wall is designed as a slot, and one for Interior thickening penetrates. Through the slot a largely homogeneous flow of cooling fluid forms over the entire slot length. Because of the thickening A favorable length-diameter ratio even with an extremely thin outer wall of the outlet as well as a flat one Tilt angle of the slot of the outlet with respect to the outer wall guaranteed.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Description
- FIG 1
- eine Turbinenschaufel einer Gasturbine in einem Querschnitt,
- FIG 2
- eine vergrößerte Darstellung der Wandstruktur gemäß FIG 1 und
- FIG 3
- eine Draufsicht auf die Außenwand einer Turbinenschaufel einer Gasturbine.
Claims (12)
- Turbinenschaufel (1), die entlang einer Hauptachse (2) gerichtet ist und eine Wandstruktur (3) aufweist, wobei die Wandstruktur einen Innenraum (4) zur Führung von Kühlfluid (5) umgibt, eine Außenwand (6) mit einer Außenoberfläche (7) und einer dem Innenraum (4) zugewandten Innenoberfläche (8) umfaßt sowie einen Auslaß (9) für Kühlfluid (5) aufweist, wobei der Auslaß (9) an der Außenoberfläche (7) als Schlitz (10) ausgebildet ist, dadurch gekennzeichnet, daß die Außenwand (6) eine zum Innenraum (4) gerichtete Verdickung (11) aufweist, die der Auslaß (9) durchdringt.
- Turbinenschaufel nach Anspruch 1,
dadurch gekennzeichnet, daß der Schlitz (10) sich über eine Eindringtiefe (E) in die Außenwand (6) erstreckt, ohne diese zu durchdringen. - Turbinenschaufel nach Anspruch 2,
dadurch gekennzeichnet, daß der Schlitz (10), über die gesamte Eindringtiefe (E) einen konstanten Querschnitt aufweist. - Turbinenschaufel nach einem der vorhergehenden Ansprüche ,
dadurch gekennzeichnet, daß der Schlitz (10) parallel zur Hauptachse (2) orientiert ist. - Turbinenschaufel nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, daß der Schlitz (10) unter einem spitzen Winkel α zur Außenoberfläche (7), insbesondere im Bereich zwischen 10° und 45° angebracht ist. - Turbinenschaufel nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, daß die Verdickung (11) im Bereich des Auslasses (9) eine Vertiefung (12) aufweist. - Turbinenschaufel nach Anspruch 6,
dadurch gekennzeichnet, daß die Vertiefung (12) sacklochartig ausgeführt ist. - Turbinenschaufel nach Anspruch 6 oder 7,
dadurch gekennzeichnet, daß der Schlitz (10) die Vertiefung (12) schneidet. - Turbinenschaufel nach Anspruch 8,
dadurch gekennzeichnet, daß der Querschnitt der Vertiefung (12) kleiner als der Querschnitt des Schlitzes (10) ist. - Turbinenschaufel nach Anspruch 9,
dadurch gekennzeichnet, daß der Schlitz (10) eine Schlitzhöhe (H) und die Vertiefung einen Durchmesser (D) aufweisen und die Schlitzhöhe (H) in der gleichen Größenordnung wie der Durchmesser (D), insbesondere im Bereich zwischen 0,5 mm und 1,0 mm liegt. - Turbinenschaufel nach einem der vorhergehenden Ansprüche, welche eine Laufschaufel oder eine Leitschaufel für eine Gasturbine ist.
- Verwendung einer Turbinenschaufel nach einem der vorhergehenden Ansprüche in einer Gasturbinenanlage.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19741231 | 1997-09-18 | ||
DE19741231 | 1997-09-18 | ||
PCT/DE1998/002657 WO1999014465A1 (de) | 1997-09-18 | 1998-09-08 | Turbinenschaufel sowie verwendung einer turbinenschaufel |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1015736A1 EP1015736A1 (de) | 2000-07-05 |
EP1015736B1 true EP1015736B1 (de) | 2003-11-19 |
Family
ID=7842852
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98954146A Expired - Lifetime EP1015736B1 (de) | 1997-09-18 | 1998-09-08 | Turbinenschaufel sowie verwendung einer turbinenschaufel |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1015736B1 (de) |
JP (1) | JP2001516834A (de) |
DE (1) | DE59810230D1 (de) |
WO (1) | WO1999014465A1 (de) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10236676A1 (de) * | 2002-08-09 | 2004-02-19 | Rolls-Royce Deutschland Ltd & Co Kg | Turbinenschaufel für eine Gasturbine mit zumindest einer Kühlungsausnehmung |
JP5039837B2 (ja) * | 2005-03-30 | 2012-10-03 | 三菱重工業株式会社 | ガスタービン用高温部材 |
CA2870740C (en) * | 2012-04-23 | 2017-06-13 | General Electric Company | Turbine airfoil with local wall thickness control |
US9957814B2 (en) | 2014-09-04 | 2018-05-01 | United Technologies Corporation | Gas turbine engine component with film cooling hole with accumulator |
US10982552B2 (en) * | 2014-09-08 | 2021-04-20 | Raytheon Technologies Corporation | Gas turbine engine component with film cooling hole |
US20170306764A1 (en) * | 2016-04-26 | 2017-10-26 | General Electric Company | Airfoil for a turbine engine |
FR3111661B1 (fr) * | 2020-06-22 | 2022-11-04 | Safran Aircraft Engines | Aube de turbine avec système de refroidissement |
US11486259B1 (en) | 2021-11-05 | 2022-11-01 | General Electric Company | Component with cooling passage for a turbine engine |
CN114382553B (zh) * | 2021-12-26 | 2024-06-18 | 西北工业大学 | 涡轮叶片中弦区用高堵塞比肋片层板冷却结构及冷却方法 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4314442A (en) * | 1978-10-26 | 1982-02-09 | Rice Ivan G | Steam-cooled blading with steam thermal barrier for reheat gas turbine combined with steam turbine |
US4672727A (en) * | 1985-12-23 | 1987-06-16 | United Technologies Corporation | Method of fabricating film cooling slot in a hollow airfoil |
US4859147A (en) * | 1988-01-25 | 1989-08-22 | United Technologies Corporation | Cooled gas turbine blade |
US5405242A (en) | 1990-07-09 | 1995-04-11 | United Technologies Corporation | Cooled vane |
GB2262314A (en) * | 1991-12-10 | 1993-06-16 | Rolls Royce Plc | Air cooled gas turbine engine aerofoil. |
US5651662A (en) * | 1992-10-29 | 1997-07-29 | General Electric Company | Film cooled wall |
US5458461A (en) * | 1994-12-12 | 1995-10-17 | General Electric Company | Film cooled slotted wall |
DE59806535D1 (de) * | 1997-02-20 | 2003-01-16 | Siemens Ag | Turbinenschaufel sowie deren verwendung in einer gasturbinenanlage |
-
1998
- 1998-09-08 EP EP98954146A patent/EP1015736B1/de not_active Expired - Lifetime
- 1998-09-08 DE DE59810230T patent/DE59810230D1/de not_active Expired - Fee Related
- 1998-09-08 WO PCT/DE1998/002657 patent/WO1999014465A1/de active IP Right Grant
- 1998-09-08 JP JP2000511984A patent/JP2001516834A/ja not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
EP1015736A1 (de) | 2000-07-05 |
JP2001516834A (ja) | 2001-10-02 |
WO1999014465A1 (de) | 1999-03-25 |
DE59810230D1 (de) | 2003-12-24 |
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