WO2012147938A1 - タービン翼 - Google Patents
タービン翼 Download PDFInfo
- Publication number
- WO2012147938A1 WO2012147938A1 PCT/JP2012/061422 JP2012061422W WO2012147938A1 WO 2012147938 A1 WO2012147938 A1 WO 2012147938A1 JP 2012061422 W JP2012061422 W JP 2012061422W WO 2012147938 A1 WO2012147938 A1 WO 2012147938A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- blade
- line
- curve portion
- dorsal
- ventral
- Prior art date
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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
- F01D5/141—Shape, i.e. outer, aerodynamic form
- F01D5/145—Means for influencing boundary layers or secondary circulations
-
- 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
-
- 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
- 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
- F05D2250/30—Arrangement of components
- F05D2250/32—Arrangement of components according to their shape
- F05D2250/322—Arrangement of components according to their shape tangential
-
- 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
-
- 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
-
- 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
- F05D2270/00—Control
- F05D2270/01—Purpose of the control system
- F05D2270/17—Purpose of the control system to control boundary layer
-
- 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 turbine blade used in, for example, an aircraft jet engine.
- profile loss is attracting attention.
- This profile loss is mainly due to a loss of velocity distribution based on the wake from the trailing edge of the turbine blade.
- An important point for reducing the profile loss is how to reduce the velocity distribution deficiency.
- the thinner the blade trailing edge of the turbine blade the smaller the velocity distribution defect.
- the shape of the blade back line and blade belly side line connected by a semicircle arc of a perfect circle, or the shape connected by a straight line perpendicular to the camber line is the blade trailing edge. Many are adopted.
- the thickness of the blade trailing edge cannot be less than the diameter of the semicircle. Therefore, the thickness of the blade trailing edge becomes relatively large, the wake from the blade trailing edge of the turbine blade becomes large, and the velocity distribution defect becomes relatively large.
- Patent Document 1 Conventionally, as a turbine blade formed so as to reduce the velocity distribution defect, there is one disclosed in Patent Document 1, for example.
- the radius of curvature gradually decreases from either the blade back line or the blade vent line toward the rear end portion located on the most downstream side in the fluid flow direction.
- the radius of curvature becomes the smallest at the end, and then the radius of curvature gradually increases from the rear end toward the other side of the wing back side line or wing ventral side line. It has the structure which has the curved surface of the rear edge part leading to the other.
- the thickness of the blade trailing edge can be reduced while maintaining sufficient strength as compared with a turbine blade having a semicircular blade trailing edge.
- the string length increases. Therefore, there is a concern about the influence on the structural design due to the increase in the blade weight and the change in the axial clearance between the blades as the chord length increases, and it has been a conventional problem to solve this.
- the present invention has been made by paying attention to the above-mentioned conventional problems, and after ensuring that the strength is ensured and the weight of the blade is increased or the structural design is affected, loss due to velocity distribution loss
- An object of the present invention is to provide a turbine blade that can further improve the performance while suppressing the amount of the pressure and can increase the work.
- the present invention has a blade trailing edge formed by connecting a blade back side line, a blade blade side line, and the rear ends of the blade back side line and the blade blade side line with curves.
- a curve forming a blade trailing edge in the profile includes a ventral curve portion having an arc shape with a constant radius of curvature from a rear end of the blade ventral line toward the camber line of the profile, and the camber A dorsal curve portion that passes through a region closer to the camber line than a symmetric curve portion that is in line symmetry with the ventral curve portion with a line in between, and from the rear end of the blade dorsal line toward the camber line It is assumed that the connection is made.
- the camber line which is the airfoil centerline, is curved, but is substantially straight at the trailing edge of the blade. Therefore, the turbine blade according to the present invention also has a camber at the trailing edge of the blade.
- the line is treated as a straight line.
- the dorsal curve portion has a configuration represented by an elliptical configuration line extending from the center of the curved portion along the major axis direction of the ellipse to the center of the curved portion along the minor axis direction.
- connection point between the rear end of the blade dorsal line and the back curve portion is not less than the length of the radius of the ventral curve portion from the rearmost end of the blade trailing edge in the profile and the blade. It is assumed that the position is within a range of 10% or less of the chord length.
- connection point between the rear end of the blade dorsal line and the dorsal curve portion is not less than three times the length of the radius at the ventral curve portion from the rearmost end of the blade trailing edge in the profile. And it is set as the structure located in the range of 10% or less of chord length.
- a position (near point) S closest to the rearmost end 5a of the blade trailing edge 5 that can be a connection point P between the rear end of the blade backside line 2 and the back curve portion 4b is: It is set based on the radius R of the ventral side curved portion 4a having an arc shape. When the chord length is C, the radius R of this circle is often set to 0.5% to 2% of the chord length C.
- the most distant position (far point) from the rearmost end 5a of the blade trailing edge 5 that can be the connection point P between the rear end of the blade backside line 2 and the back curve portion 4b is to reduce the thickness of the blade trailing edge 5.
- the profile was set to 10% or less of the chord length from the rearmost end 5a of the blade trailing edge 5 in the profile.
- FIG. 2 shows a case where the connection point P between the rear end of the blade back side line 2 and the back curve portion 4 b is set to a position 5% of the chord length C from the rearmost end 5 a of the blade trailing edge 5.
- connection point between the ventral curve portion and the dorsal curve portion is about 30 ° around the center of the ventral curve portion located on the camber line and 30 ° on the dorsal ventral side of the camber line. It is set as the structure located in the range.
- connection point between the ventral curve portion and the dorsal curve portion can be shifted to both the dorsal side and the ventral side of the camber line, how to connect the ventral curve portion and the dorsal curve portion.
- the degree of freedom increases in manufacturing.
- the dorsal curve portion of the curve forming the blade trailing edge passes through a region closer to the camber line than the symmetrical curve portion that is in line symmetry with the ventral curve portion with the camber line in between. Since the rear end of the blade back line reaches the camber line, the main flow (air flow) at the back curve is accelerated and the boundary layer becomes smaller. In addition, the main flow becomes the dorsal curve by the Coanda effect. As a result, the outflow angle from the trailing edge of the main wing increases.
- the strength is ensured, and the loss due to the velocity distribution deficiency is suppressed and the performance is further improved without causing the fear that the blade weight may increase or the influence on the structural design.
- the outflow angle from the mainstream blade trailing edge can be increased, resulting in a very good effect of increasing work.
- FIG. 1 and 2 show the profile of a turbine blade according to an embodiment of the present invention.
- the turbine blade 1 has a profile including a blade back side line 2, a blade ventral side line 3, a blade trailing edge 5, and a blade leading edge 6.
- the rear ends of the blade back side line 2 and the blade ventral side line 3 are connected by a curve 4 in the profile.
- the curve 4 forming the blade trailing edge 5 in the profile is composed of a ventral curve portion 4a and a dorsal curve portion 4b.
- the ventral curve portion 4a has an arc shape with a constant radius of curvature from the rear end of the wing ventral line 3 toward the camber line CL of the profile.
- the dorsal curve portion 4b is a symmetrical curve portion (a curve portion indicated by a two-dot chain line in the enlarged portion of FIG. 1) that is symmetrical with the ventral curve portion 4 with the camber line CL from the rear end of the blade dorsal line 2 in between. That is, it passes toward the camber line CL through a region closer to the camber line CL than the conventional back side curve portion).
- the ventral curve portion 4a and the dorsal curve portion 4b are connected to each other in the vicinity of the camber line CL.
- the dorsal curve portion 4 b is represented by an elliptical component line extending from the center of the curved portion along the major axis a direction of the ellipse A to the center of the curved portion along the minor axis b direction. Yes.
- connection point P between the rear end of the blade back line 2 and the back curve portion 4b of the curve 4 is to reduce the change in the natural frequency while reducing the thickness of the blade trailing edge 5. It is set at a position of 5% C (C is the chord length) from the rearmost end 5a of the blade trailing edge 5.
- the back curve portion 4b of the curve 4 forming the blade trailing edge 5 is connected to the camber line CL from the rear end of the blade back side line 2 than the symmetrical curve portion.
- the mainstream FP in the dorsal curve portion 4b is accelerated, and the Coanda effect causes the dorsal curve portion 4b to the ventral curve portion. 4a, and the outflow angle of the mainstream FP from the blade trailing edge 5 is increased as compared with the conventional mainstream FB that flows straight out from the conventional blade trailing edge 55 shown in FIG.
- the blade trailing edge (blade back side line and blade backside line in the conventional turbine blade indicated by a two-dot chain line in the enlarged portion of FIG.
- connection point between the ventral curve portion 4a and the dorsal curve portion 4b of the curve 4 forming the blade trailing edge 5 in the turbine blade 1 according to the present invention is the blade trailing edge 5 on the camber line CL.
- the present invention is not limited to this.
- the connection point Q between the ventral curve portion 4a and the dorsal curve portion 4b of the curve 4 is described. However, it is good also as a structure located in the site
- connection point Q between the ventral curve portion 4a and the dorsal curve portion 4b of the curve 4 may be positioned around the center O of the ventral curve portion 4a and in the range of 30 ° on the ventral side of the camber line CL. .
- connection point Q between the ventral curve portion 4a and the dorsal curve portion 4b can be shifted to the dorsal ventral side of the camber line CL, the connection between the ventral curve portion 4a and the dorsal curve portion 4b is possible. As a result, the degree of freedom in the method of spreading increases, and the manufacture becomes easier.
- the configuration of the turbine blade according to the present invention is not limited to the above-described embodiment.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
Description
特許文献1に記載されたタービン翼は、翼背側ライン又は翼腹側ラインのいずれか一方から流体の流れ方向の最も下流側に位置する後端部に向かって漸次曲率半径が減少して後端部で曲率半径が最も小さくなり、その後、後端部から翼背側ライン又は翼腹側ラインのいずれか他方に向かって漸次曲率半径が増加して翼背側ライン又は翼腹側ラインのいずれか他方に至る後縁部の曲面を有する構成を成している。
図1及び図2は本発明の一実施例に係るタービン翼のプロファイルを示している。
2 翼背側ライン
3 翼腹側ライン
4 曲線
4a 腹側曲線部
4b 背側曲線部
5 翼後縁
5a 翼後縁の最後端
A 楕円
a 楕円の長径
b 楕円の短径
C 翼弦長
CL キャンバライン
FP 主流
O 腹側曲線部の中心
P 翼背側ラインと背側曲線部との接続点
Q 腹側曲線部と背側曲線部との接続点
R 腹側曲線部の半径
S 近地点
Claims (5)
- 翼背側ラインと、
翼腹側ラインと、
前記翼背側ライン及び翼腹側ラインの各後端同士を曲線で繋いで成る翼後縁を有するプロファイルのタービン翼において、
前記プロファイルにおける翼後縁を形成する曲線は、
前記翼腹側ラインの後端から前記プロファイルのキャンバラインに向かう曲率半径一定の円弧状を成す腹側曲線部と、
前記キャンバラインを間にして前記腹側曲線部と線対称を成す対称曲線部よりも該キャンバラインに近い領域を通過して前記翼背側ラインの後端から前記キャンバラインに向かう背側曲線部とを接続して成っている
ことを特徴とするタービン翼。 - 前記背側曲線部は、楕円の長径方向に沿う曲線部分の中央から短径方向に沿う曲線部分の中央にかけての楕円構成線で表される
ことを特徴とする請求項1に記載のタービン翼。 - 前記翼背側ラインの後端と前記背側曲線部との接続点は、前記プロファイルにおける翼後縁の最後端から前記腹側曲線部の半径の長さ寸法以上で且つ翼弦長の10%以下の範囲内に位置している
ことを特徴とする請求項1又は2に記載のタービン翼。 - 前記翼背側ラインの後端と前記背側曲線部との接続点は、前記プロファイルにおける翼後縁の最後端から前記腹側曲線部における半径の三倍の長さ寸法以上で且つ翼弦長の10%以下の範囲内に位置している
ことを特徴とする請求項1又は2に記載のタービン翼。 - 前記腹側曲線部と前記背側曲線部との接続点は、前記キャンバライン上に位置する前記腹側曲線部の中心周りで且つ該キャンバラインの背腹側各30°の範囲内に位置している
ことを特徴とする請求項1~4のいずれか一つの項に記載のタービン翼。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2013512478A JP5549825B2 (ja) | 2011-04-28 | 2012-04-27 | タービン翼 |
EP12776447.0A EP2703600B1 (en) | 2011-04-28 | 2012-04-27 | Turbine blade |
CA2833859A CA2833859C (en) | 2011-04-28 | 2012-04-27 | Turbine blade with loss-suppressing trailing edge |
US14/113,265 US9371734B2 (en) | 2011-04-28 | 2013-10-22 | Turbine blade |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2011101266 | 2011-04-28 | ||
JP2011-101266 | 2011-04-28 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US14/113,265 Continuation US9371734B2 (en) | 2011-04-28 | 2013-10-22 | Turbine blade |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2012147938A1 true WO2012147938A1 (ja) | 2012-11-01 |
Family
ID=47072450
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2012/061422 WO2012147938A1 (ja) | 2011-04-28 | 2012-04-27 | タービン翼 |
Country Status (5)
Country | Link |
---|---|
US (1) | US9371734B2 (ja) |
EP (1) | EP2703600B1 (ja) |
JP (1) | JP5549825B2 (ja) |
CA (1) | CA2833859C (ja) |
WO (1) | WO2012147938A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014069216A1 (ja) * | 2012-10-31 | 2014-05-08 | 株式会社Ihi | タービン翼 |
EP2927427A1 (de) | 2014-04-04 | 2015-10-07 | MTU Aero Engines GmbH | Gasturbinenschaufel |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10443607B2 (en) * | 2016-04-11 | 2019-10-15 | Rolls-Royce Plc | Blade for an axial flow machine |
WO2020055387A1 (en) * | 2018-09-12 | 2020-03-19 | General Electric Company | Hybrid elliptical-circular trailing edge for a turbine airfoil |
GB2581351A (en) | 2019-02-13 | 2020-08-19 | Rolls Royce Plc | Blade for a gas turbine engine |
US11840939B1 (en) * | 2022-06-08 | 2023-12-12 | General Electric Company | Gas turbine engine with an airfoil |
Citations (4)
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DE10039642A1 (de) * | 2000-08-14 | 2002-03-07 | Honda Motor Co Ltd | Turbinenblattluftflügel und Turbinenblatt für eine Axialstromturbine |
JP2003254002A (ja) * | 2002-03-01 | 2003-09-10 | Honda Motor Co Ltd | 軸流型タービンのタービン翼型およびタービン翼 |
JP2005076533A (ja) * | 2003-08-29 | 2005-03-24 | Toshiba Corp | タービン翼 |
JP2011017290A (ja) | 2009-07-09 | 2011-01-27 | Mitsubishi Heavy Ind Ltd | 翼体および回転機械 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
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US6461110B1 (en) * | 2001-07-11 | 2002-10-08 | General Electric Company | First-stage high pressure turbine bucket airfoil |
US6769879B1 (en) * | 2003-07-11 | 2004-08-03 | General Electric Company | Airfoil shape for a turbine bucket |
DE102005025213B4 (de) * | 2005-06-01 | 2014-05-15 | Honda Motor Co., Ltd. | Schaufel einer Axialströmungsmaschine |
EP2299124A1 (de) * | 2009-09-04 | 2011-03-23 | Siemens Aktiengesellschaft | Verdichterlaufschaufel für einen Axialverdichter |
-
2012
- 2012-04-27 WO PCT/JP2012/061422 patent/WO2012147938A1/ja active Application Filing
- 2012-04-27 CA CA2833859A patent/CA2833859C/en active Active
- 2012-04-27 EP EP12776447.0A patent/EP2703600B1/en active Active
- 2012-04-27 JP JP2013512478A patent/JP5549825B2/ja active Active
-
2013
- 2013-10-22 US US14/113,265 patent/US9371734B2/en active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10039642A1 (de) * | 2000-08-14 | 2002-03-07 | Honda Motor Co Ltd | Turbinenblattluftflügel und Turbinenblatt für eine Axialstromturbine |
JP2003254002A (ja) * | 2002-03-01 | 2003-09-10 | Honda Motor Co Ltd | 軸流型タービンのタービン翼型およびタービン翼 |
JP2005076533A (ja) * | 2003-08-29 | 2005-03-24 | Toshiba Corp | タービン翼 |
JP2011017290A (ja) | 2009-07-09 | 2011-01-27 | Mitsubishi Heavy Ind Ltd | 翼体および回転機械 |
Non-Patent Citations (1)
Title |
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See also references of EP2703600A4 |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014069216A1 (ja) * | 2012-10-31 | 2014-05-08 | 株式会社Ihi | タービン翼 |
US10024167B2 (en) | 2012-10-31 | 2018-07-17 | Ihi Corporation | Turbine blade |
EP2927427A1 (de) | 2014-04-04 | 2015-10-07 | MTU Aero Engines GmbH | Gasturbinenschaufel |
US9869184B2 (en) | 2014-04-04 | 2018-01-16 | MTU Aero Engines AG | Gas turbine blade |
Also Published As
Publication number | Publication date |
---|---|
JPWO2012147938A1 (ja) | 2014-07-28 |
US20140112795A1 (en) | 2014-04-24 |
CA2833859A1 (en) | 2012-11-01 |
EP2703600A1 (en) | 2014-03-05 |
US9371734B2 (en) | 2016-06-21 |
EP2703600B1 (en) | 2024-01-17 |
JP5549825B2 (ja) | 2014-07-16 |
EP2703600A4 (en) | 2014-10-15 |
CA2833859C (en) | 2016-12-13 |
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