WO2001075276A1 - Gas turbine engine - Google Patents
Gas turbine engine Download PDFInfo
- Publication number
- WO2001075276A1 WO2001075276A1 PCT/JP2000/009150 JP0009150W WO0175276A1 WO 2001075276 A1 WO2001075276 A1 WO 2001075276A1 JP 0009150 W JP0009150 W JP 0009150W WO 0175276 A1 WO0175276 A1 WO 0175276A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- blade
- gas
- gas turbine
- turbine engine
- curvature
- 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.)
- Ceased
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
-
- 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
-
- 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
- F05D2240/00—Components
- F05D2240/20—Rotors
- F05D2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
- F05D2240/302—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor characteristics related to shock waves, transonic or supersonic flow
-
- 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
- F05D2250/00—Geometry
- F05D2250/70—Shape
- F05D2250/71—Shape curved
- F05D2250/711—Shape curved convex
-
- 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
- F05D2250/00—Geometry
- F05D2250/70—Shape
- F05D2250/71—Shape curved
- F05D2250/712—Shape curved concave
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T50/00—Aeronautics or air transport
- Y02T50/60—Efficient propulsion technologies, e.g. for aircraft
Definitions
- the present invention relates to a gas turbine engine in which turbine blades are arranged in a radial direction in an annular gas passage defined by an inner peripheral wall and an outer peripheral wall.
- Japanese Unexamined Patent Publication No. Hei 11-241 601 discloses an axial cross section of an axial flow fan having a stationary blade and a moving blade, in which an axial section of an inner peripheral wall of a casing to which the stationary blade and the moving blade are connected.
- a recess having a concave portion that is recessed radially inward with respect to a straight line that connects the leading edge of the root portion of the front stationary blade to the trailing edge of the root of the rear moving blade.
- the present invention has been made in view of the above circumstances, and suppresses the generation of a shock wave to prevent an increase in pressure loss when a stagger angle is increased by reducing the thickness of a turbine blade of a gas turbine engine.
- the purpose is to do.
- an inner peripheral wall or an outer peripheral wall is provided for a gas bin engine in which turbine blades are radially arranged in an annular gas passage defined by an inner peripheral wall and an outer peripheral wall.
- the axial cross section of the connection part connected to the turbine blade has a concave portion on the leading edge side with a negative curvature to the gas flow direction and a convex portion on the trailing edge side with a positive curvature.
- a gas turbine engine is proposed.
- a gas turbine engine is proposed in which the height of the projection is 10% or less of the length of the gas passage in the radial direction.
- a gas turbine engine characterized in that an axial cross section of the connection portion has at least one inflection point between a leading edge and a trailing edge.
- a gas turbine bingengin is proposed in which the inflection point on the leading edge side of the at least one inflection point is located forward of the center position of the chord of the turbine blade. .
- the axial position of the concave portion is set such that the axial position of the minimum negative pressure point near the front edge of the turbine blade connected to the flat connection portion is within the range of the concave portion.
- a gas evening-bin engine is proposed.
- a gas turbine engine wherein a front end of the concave portion is located behind a front edge.
- the wall thickness is reduced to reduce the weight of the turbine blades of the gas turbine engine, the required stagger angle increases, and the flow velocity of the combustion gas in the front half of the upper surface of the blade main body rapidly accelerates and decelerates.
- a critical Mach number is reached and a shock wave is generated, causing a large pressure loss and degrading the performance of the gas turbine engine.
- the front-side concave portion having a negative curvature with respect to the gas flow direction has a positive concave portion.
- the flow velocity on the upper surface of the blade main body is reduced by the concave portion on the leading edge side, suppressing the generation of shock waves and following the concave portion.
- the flow rate at the convex portion on the trailing edge side it is possible to smoothly change the flow rate on the upper surface of the blade body and minimize the pressure loss.
- the thickness of the blade body can be reduced while ensuring the performance of the gas turbine engine, thereby contributing to a reduction in weight.
- This effect is achieved by setting the height of the projections to 10% or less of the radial length of the gas passage, placing the inflection point between the depressions and the projections ahead of the center position of the chord,
- the absolute value of the negative curvature is made smaller than the absolute value of the positive curvature of the convex part, and the conventional This is more effectively achieved by making the minimum negative pressure point closest to the leading edge exist, and by locating the front end of the recess behind the leading edge.
- FIG. 1 is a diagram showing the shape of a turbine blade of a gas turbine engine.
- FIG. 2 is a diagram showing the shape of an inner wall surface along the chord of a Yubin bin blade. It is a figure which shows the curvature of a wall surface, and a blade surface velocity distribution.
- Figure 1 shows the turbine blade 11 of an axial-flow gas evening bin engine.
- the evening bin blade 11 consists of a blade body 12 located radially outward and a blade body 1 2
- the blade end wall portion 13 is located radially inward
- the blade mounting portion 14 is located radially inside the blade end wall portion 13.
- the airfoil at the root of the blade body 12 (adjacent to the blade end wall 13), shown as an X—X section in Figure 1, has a leading edge 12 a, a trailing edge 12 b, and a top surface 1 2d and a lower surface 12e, and the straight line connecting the leading edge 12a and the trailing edge 12b has a relatively large sagger angle in the direction of the axis A of the gas turbine engine.
- the blade angle of the blade body 12 of this embodiment is set to be larger than the conventional angle of 0 ° to 20 °.
- the blade thickness of the blade body 12 can be reduced, and as a result, the evening bin blade can be used without changing the material.
- the weight of 11 can be reduced by 20% compared to the conventional one.
- the tip portion 12 c at the radially outer end of the blade body 12 faces the annular outer peripheral wall 15 a of the outer casing 15 via a slight tip clearance 16.
- An annular hub 17a is formed on the outer periphery of the blade disk 17 rotatably supported around the axis A of the gas turbine engine, and the blade mounting portion 14 for a number of turbine blades 11 is formed as described above. Mounted radially on hub 17a.
- the blade mounting part 14 is A plurality of ridges 14a and grooves 14b extending alternately in the direction of the axis A of the engine are provided alternately, and the ridges 14a and grooves 14b engage with the hub 17a. .
- the blade end walls 13 of the evening bin blades 11 are connected integrally in the circumferential direction, and are formed in an annular shape.
- the inner peripheral wall 13a is formed.
- An annular gas passage 18 is formed so as to be surrounded by the outer peripheral wall 15a and the inner peripheral wall 13a, and the evening bin blade 1 is provided in the gas passage 18 through which the combustion gas flows in the direction of arrow F. 1 is placed.
- stays (not shown) are arranged on the front and rear sides in the axial direction of the turbine blade 11, respectively.
- the axial cross section of the annular inner peripheral wall 13a formed by the blade end wall portion 13 of the turbine blade 11 has a part formed of a curved line.
- the axial cross section of the inner peripheral wall 13a extends from the leading edge 12a side to the trailing edge 12b side from the first linear portion 19, the first concave portion 20, the convex portion 21, the second concave portion. 22 and a second straight portion 23.
- the curvature is a negative value and is concaved in the direction toward the axis A
- the curvature is a positive value and the direction is away from the axis A. Convex.
- a first inflection point a exists where the curvature transitions from a negative value to a positive value
- a second inflection point b exists where the curvature transitions from a positive value to a negative value.
- the curvature of the upper surface 12 d of the blade body 12 is a positive value over the entire area from the leading edge 12 a to the trailing edge 12.
- the characteristic portion of the axial cross section of the inner peripheral wall 13 a of the present embodiment is that a first concave portion 20 and a convex portion 21 are continuously formed behind the first linear portion 19 following the leading edge 12 a. Because of the arrangement, the first concave portion 20, the convex portion 21, and the second concave portion 22 are formed within the range of the first concave portion 20 (range from the point d at the front end to the point a at the rear end). There is a minimum negative pressure point on the foremost side of the conventional blade main body having a flat inner peripheral wall 13a that is not formed.
- the deepest point c of the first concave portion 20 (the point at which the distance from the straight line connecting the front end ⁇ and the rear end a of the first concave portion 20 becomes maximum) is located near the minimum negative pressure point. .
- the first inflection point a is located ahead of the 50% position of the chord (the middle position between the leading edge 12a and the trailing edge 12b), and the negative curvature of the first recess 20 is
- the absolute value is set smaller than the absolute value of the positive curvature of the convex portion 21.
- the height of the convex portion 21 is the length of the gas passage 18 in the radial direction, That is, it is appropriate to set the distance between the inner peripheral wall 13a and the outer peripheral wall 15a to 10% or less.
- the sagger angle As shown by the broken line in the graph of the velocity distribution of the blade upper surface 12 d in FIG. 2, the velocity distribution of the combustion gas on the upper surface 12 d of the blade body 12 sharply increases and then decreases sharply, It can be seen that a large pressure loss occurs.
- the axial cross section of the inner peripheral wall 13 a of the blade end wall portion 13 is provided with the first concave portion 20 and the convex portion 21 continuously, so that the combustion gas is generated in the first concave portion 20. Can be diffused in the radial direction, and the rapid increase in the flow velocity can be suppressed to prevent the generation of shock waves. Then, since the flow rate of the combustion gas is increased by the convex portion 21 following the first concave portion 20, the upper surface 1 of the blade main body 1 2 as shown by the solid line in the velocity distribution graph of 2d of FIG. It can be seen that the pressure loss can be reduced by smoothly increasing the velocity distribution of the 2d combustion gas.
- the stagger angle is increased by merely changing the axial cross-sectional shape of the inner peripheral wall 13 a of the blade end wall 13 of the turbine blade 11 1, the upper surface 1 2
- the rapid change in the speed distribution in d can be suppressed, minimizing the pressure loss and ensuring the performance of the gas turbine engine, while reducing the thickness of the blade body 12 and contributing to weight reduction. can do.
- the turbine blade 11 is exemplified as the turbine blade.
- the present invention can be similarly applied to a stay evening of a gas evening bin engine.
- the present invention may be applied to the inner peripheral wall to which the radial inner end of the stay is connected or the outer peripheral wall to which the radial outer end of the stay is connected. it can.
- the present invention can be applied to an axial flow type gas turbine engine for aircraft, stationary use, and any other use.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Description
Claims
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP00985839A EP1270872B1 (en) | 2000-03-27 | 2000-12-22 | Gas turbine engine |
| US10/240,107 US6837679B2 (en) | 2000-03-27 | 2000-12-22 | Gas turbine engine |
| CA002405810A CA2405810C (en) | 2000-03-27 | 2000-12-22 | Gas turbine engine |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000-90730 | 2000-03-27 | ||
| JP2000090730A JP2001271602A (ja) | 2000-03-27 | 2000-03-27 | ガスタービンエンジン |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2001075276A1 true WO2001075276A1 (en) | 2001-10-11 |
Family
ID=18606301
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2000/009150 Ceased WO2001075276A1 (en) | 2000-03-27 | 2000-12-22 | Gas turbine engine |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US6837679B2 (ja) |
| EP (1) | EP1270872B1 (ja) |
| JP (1) | JP2001271602A (ja) |
| CA (1) | CA2405810C (ja) |
| WO (1) | WO2001075276A1 (ja) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004038180A1 (en) * | 2002-10-23 | 2004-05-06 | United Technologies Corporation | Apparatus and method for reducing the heat load of an airfoil |
Families Citing this family (36)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2407136B (en) * | 2003-10-15 | 2007-10-03 | Alstom | Turbine rotor blade for gas turbine engine |
| US7690890B2 (en) * | 2004-09-24 | 2010-04-06 | Ishikawajima-Harima Heavy Industries Co. Ltd. | Wall configuration of axial-flow machine, and gas turbine engine |
| US7217096B2 (en) * | 2004-12-13 | 2007-05-15 | General Electric Company | Fillet energized turbine stage |
| US7134842B2 (en) * | 2004-12-24 | 2006-11-14 | General Electric Company | Scalloped surface turbine stage |
| JP4533219B2 (ja) * | 2005-04-08 | 2010-09-01 | キヤノン株式会社 | 画像形成装置、画像形成装置の制御方法及びプログラム |
| US7220100B2 (en) * | 2005-04-14 | 2007-05-22 | General Electric Company | Crescentic ramp turbine stage |
| US7874794B2 (en) * | 2006-03-21 | 2011-01-25 | General Electric Company | Blade row for a rotary machine and method of fabricating same |
| EP1857635A1 (de) * | 2006-05-18 | 2007-11-21 | Siemens Aktiengesellschaft | Turbinenschaufel für eine Gasturbine |
| DE102007020025A1 (de) * | 2007-04-27 | 2008-10-30 | Honda Motor Co., Ltd. | Form eines Gaskanals in einer Axialströmungs-Gasturbinenmaschine |
| US7614852B2 (en) * | 2007-12-24 | 2009-11-10 | Clark Philip G | Wind turbine blade and assembly |
| US20090257884A1 (en) * | 2007-12-24 | 2009-10-15 | Clark Philip G | Wind turbine blade and assembly |
| FR2928173B1 (fr) | 2008-02-28 | 2015-06-26 | Snecma | Aube avec plateforme 3d comportant un bulbe interaubes. |
| US8316096B2 (en) | 2008-04-29 | 2012-11-20 | Kota Enterprises, Llc | Facemail |
| US9002922B2 (en) * | 2008-05-15 | 2015-04-07 | Kota Enterprises, Llc | Question server to facilitate communication between participants |
| US8647067B2 (en) * | 2008-12-09 | 2014-02-11 | General Electric Company | Banked platform turbine blade |
| US8459956B2 (en) * | 2008-12-24 | 2013-06-11 | General Electric Company | Curved platform turbine blade |
| DE102009036406A1 (de) * | 2009-08-06 | 2011-02-10 | Mtu Aero Engines Gmbh | Schaufelblatt |
| US8439643B2 (en) * | 2009-08-20 | 2013-05-14 | General Electric Company | Biformal platform turbine blade |
| US8393872B2 (en) * | 2009-10-23 | 2013-03-12 | General Electric Company | Turbine airfoil |
| US8356975B2 (en) * | 2010-03-23 | 2013-01-22 | United Technologies Corporation | Gas turbine engine with non-axisymmetric surface contoured vane platform |
| US9976433B2 (en) | 2010-04-02 | 2018-05-22 | United Technologies Corporation | Gas turbine engine with non-axisymmetric surface contoured rotor blade platform |
| FR2971540B1 (fr) * | 2011-02-10 | 2013-03-08 | Snecma | Ensemble pale-plateforme pour ecoulement supersonique |
| FR2971539B1 (fr) * | 2011-02-10 | 2013-03-08 | Snecma | Ensemble pale-plateforme pour ecoulement subsonique |
| US9103213B2 (en) | 2012-02-29 | 2015-08-11 | General Electric Company | Scalloped surface turbine stage with purge trough |
| JP5906319B2 (ja) * | 2012-09-12 | 2016-04-20 | 三菱日立パワーシステムズ株式会社 | ガスタービン |
| US20140154068A1 (en) * | 2012-09-28 | 2014-06-05 | United Technologies Corporation | Endwall Controuring |
| US9140128B2 (en) * | 2012-09-28 | 2015-09-22 | United Technologes Corporation | Endwall contouring |
| US9188017B2 (en) | 2012-12-18 | 2015-11-17 | United Technologies Corporation | Airfoil assembly with paired endwall contouring |
| US9879540B2 (en) | 2013-03-12 | 2018-01-30 | Pratt & Whitney Canada Corp. | Compressor stator with contoured endwall |
| US10196897B2 (en) | 2013-03-15 | 2019-02-05 | United Technologies Corporation | Fan exit guide vane platform contouring |
| DE102013209966A1 (de) * | 2013-05-28 | 2014-12-04 | Honda Motor Co., Ltd. | Profilgeometrie eines Flügels für einen Axialkompressor |
| US10030523B2 (en) * | 2015-02-13 | 2018-07-24 | United Technologies Corporation | Article having cooling passage with undulating profile |
| US10907648B2 (en) | 2016-10-28 | 2021-02-02 | Honeywell International Inc. | Airfoil with maximum thickness distribution for robustness |
| US10895161B2 (en) * | 2016-10-28 | 2021-01-19 | Honeywell International Inc. | Gas turbine engine airfoils having multimodal thickness distributions |
| BE1026579B1 (fr) * | 2018-08-31 | 2020-03-30 | Safran Aero Boosters Sa | Aube a protuberance pour compresseur de turbomachine |
| US20250297571A1 (en) * | 2024-03-19 | 2025-09-25 | General Electric Company | System and apparatus for reducing bow waves in gas turbine engines |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5735102A (en) * | 1980-08-07 | 1982-02-25 | Toshiba Corp | Turbine |
| JPS6363503U (ja) * | 1986-10-15 | 1988-04-26 | ||
| US5466123A (en) * | 1993-08-20 | 1995-11-14 | Rolls-Royce Plc | Gas turbine engine turbine |
| WO1996000841A1 (en) * | 1993-06-14 | 1996-01-11 | United Technologies Corporation | Flow directing assembly for the compression section of a rotary machine |
| US5653580A (en) * | 1995-03-06 | 1997-08-05 | Solar Turbines Incorporated | Nozzle and shroud assembly mounting structure |
| JPH11241601A (ja) * | 1998-02-25 | 1999-09-07 | Ishikawajima Harima Heavy Ind Co Ltd | 軸流タービン |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2788172A (en) * | 1951-12-06 | 1957-04-09 | Stalker Dev Company | Bladed structures for axial flow compressors |
| US2918254A (en) * | 1954-05-10 | 1959-12-22 | Hausammann Werner | Turborunner |
| DE3202855C1 (de) * | 1982-01-29 | 1983-03-31 | MTU Motoren- und Turbinen-Union München GmbH, 8000 München | Einrichtung zur Verminderung von Sekundaerstroemungsverlusten in einem beschaufelten Stroemungskanal |
| US6077035A (en) * | 1998-03-27 | 2000-06-20 | Pratt & Whitney Canada Corp. | Deflector for controlling entry of cooling air leakage into the gaspath of a gas turbine engine |
| GB9823840D0 (en) * | 1998-10-30 | 1998-12-23 | Rolls Royce Plc | Bladed ducting for turbomachinery |
| US6561761B1 (en) * | 2000-02-18 | 2003-05-13 | General Electric Company | Fluted compressor flowpath |
-
2000
- 2000-03-27 JP JP2000090730A patent/JP2001271602A/ja active Pending
- 2000-12-22 CA CA002405810A patent/CA2405810C/en not_active Expired - Fee Related
- 2000-12-22 WO PCT/JP2000/009150 patent/WO2001075276A1/ja not_active Ceased
- 2000-12-22 EP EP00985839A patent/EP1270872B1/en not_active Expired - Lifetime
- 2000-12-22 US US10/240,107 patent/US6837679B2/en not_active Expired - Lifetime
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5735102A (en) * | 1980-08-07 | 1982-02-25 | Toshiba Corp | Turbine |
| JPS6363503U (ja) * | 1986-10-15 | 1988-04-26 | ||
| WO1996000841A1 (en) * | 1993-06-14 | 1996-01-11 | United Technologies Corporation | Flow directing assembly for the compression section of a rotary machine |
| US5466123A (en) * | 1993-08-20 | 1995-11-14 | Rolls-Royce Plc | Gas turbine engine turbine |
| US5653580A (en) * | 1995-03-06 | 1997-08-05 | Solar Turbines Incorporated | Nozzle and shroud assembly mounting structure |
| JPH11241601A (ja) * | 1998-02-25 | 1999-09-07 | Ishikawajima Harima Heavy Ind Co Ltd | 軸流タービン |
Non-Patent Citations (1)
| Title |
|---|
| See also references of EP1270872A4 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004038180A1 (en) * | 2002-10-23 | 2004-05-06 | United Technologies Corporation | Apparatus and method for reducing the heat load of an airfoil |
| US6969232B2 (en) | 2002-10-23 | 2005-11-29 | United Technologies Corporation | Flow directing device |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1270872B1 (en) | 2008-09-17 |
| EP1270872A1 (en) | 2003-01-02 |
| US6837679B2 (en) | 2005-01-04 |
| EP1270872A4 (en) | 2003-08-27 |
| CA2405810C (en) | 2007-09-04 |
| JP2001271602A (ja) | 2001-10-05 |
| US20030143079A1 (en) | 2003-07-31 |
| CA2405810A1 (en) | 2002-09-26 |
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