Turbine engine airfoil having trailing edge
阅读说明:本技术 具有后缘的涡轮发动机翼型件 (Turbine engine airfoil having trailing edge ) 是由 庞廷范 海伦·奥格巴辛·加布里乔尔格斯 扎卡里·丹尼尔·韦伯斯特 格里高利·特伦斯·加莱 史 于 2020-04-16 设计创作,主要内容包括:一种用于涡轮发动机的翼型件,可以包括外壁,该外壁界定内部并限定压力侧和吸力侧,该外壁在前缘和后缘之间延伸以限定弦向方向并在根部和末端之间延伸以限定跨度方向。多个出口和多个圆齿状部分可以延伸至后缘附近。(An airfoil for a turbine engine may include an outer wall bounding an interior and defining a pressure side and a suction side, the outer wall extending between a leading edge and a trailing edge to define a chordwise direction and between a root and a tip to define a span direction. The plurality of outlets and the plurality of scalloped portions may extend to near the trailing edge.)
1. An airfoil for a turbine engine, comprising:
an outer wall bounding an interior and defining a pressure side and a suction side, the outer wall extending between a leading edge and a trailing edge to define a chordwise direction and between a root and a tip to define a span direction;
a plurality of outlets extending to proximate the trailing edge; and
a plurality of non-uniform scalloped portions extending along the trailing edge, wherein at least some of the non-uniform scalloped portions are interposed between adjacent outlets.
2. The airfoil of claim 1, wherein the plurality of non-uniform scalloped portions comprise at least one of a non-uniform length, a non-uniform width, a non-uniform centerline, or a non-uniform geometry.
3. The airfoil of claim 1, wherein the plurality of non-uniform scalloped portions comprises a long scalloped portion having a first length and a short scalloped portion having a second length less than the first length.
4. The airfoil of claim 1, wherein the plurality of non-uniform scalloped portions comprises a wide scalloped portion having a first width and a narrow scalloped portion having a second width that is less than the first width.
5. The airfoil of claim 1, wherein the plurality of non-uniform scalloped portions comprises a variable width scalloped portion having a first width at a first location and a second width at a second location.
6. The airfoil of claim 1, wherein the plurality of non-uniform scalloped portions comprises a transition surface located upstream of the trailing edge and joining two adjacent scalloped portions.
7. The airfoil as claimed in any one of claims 1-6 wherein the plurality of non-uniform scalloped portions comprises a first inclined scalloped portion having a first centerline extending in the span direction and the chord direction.
8. The airfoil of claim 7, wherein the plurality of non-uniform scalloped portions comprises a second inclined scalloped portion having a second centerline that is not aligned with the first centerline.
9. The airfoil of claim 1, wherein the plurality of non-uniform scalloped portions comprises smooth scalloped portions having rounded corners and sharp scalloped portions having sharp edges.
10. The airfoil of claim 1, wherein the outlet extends along the trailing edge and the plurality of non-uniform scalloped portions extend along at least one of the pressure side or the suction side.
Technical Field
The present disclosure relates generally to airfoil cooling devices, and more particularly, to cooling outlets along an airfoil trailing edge.
Background
Turbine engines, particularly gas turbine engines or combustion turbine engines, are rotary engines that extract energy from a pressurized flow of combustion gases passing through the engine and transfer the energy to rotating turbine blades.
Turbine engines are typically designed to operate at high temperatures to increase engine efficiency. It would be beneficial to provide cooling measures for engine components (e.g., airfoils) in high temperature environments that can reduce material wear on these components and provide greater structural stability during engine operation.
Disclosure of Invention
In one aspect, the present disclosure is directed to an airfoil of a turbine engine, comprising: an outer wall bounding an interior and defining a pressure side and a suction side, the outer wall extending between a leading edge and a trailing edge to define a chordwise direction and between a root and a tip to define a span direction; a plurality of outlets extending to near the trailing edge; and a plurality of non-uniform scalloped portions extending along the trailing edge, wherein at least some of the non-uniform scalloped portions are between adjacent outlets.
In another aspect, the present disclosure is directed to an airfoil of a turbine engine, comprising: an outer wall bounding an interior and defining a pressure side and a suction side, the outer wall extending between a leading edge and a trailing edge to define a chordwise direction and between a root and a tip to define a span direction; a plurality of outlets extending to near the trailing edge; a plurality of scalloped portions extending along the trailing edge between adjacent outlets; and at least one contact point between two of the plurality of scalloped portions.
In yet another aspect, the present disclosure is directed to a method of cooling an airfoil in a turbine engine. The method includes supplying cooling air to an interior of an airfoil having a plurality of non-uniform scalloped portions extending along a trailing edge of the airfoil and a plurality of outlets, wherein at least some of the non-uniform scalloped portions are interposed between adjacent outlets; and discharging the cooling air through a plurality of outlets.
Drawings
In the drawings:
FIG. 1 is a cross-sectional schematic view of a turbine engine for an aircraft.
FIG. 2 is a perspective view of an airfoil that may be used in the turbine engine of FIG. 1.
FIG. 3 is a perspective view of a first region of the airfoil of FIG. 2 illustrating a trailing edge having a plurality of scalloped portions in accordance with aspects described herein.
FIG. 4 is a perspective view of a second region of the airfoil of FIG. 2, illustrating a trailing edge having an additional plurality of scalloped portions in accordance with aspects described herein.
Detailed Description
Various aspects of the present disclosure are directed to airfoils. For ease of description, the airfoil will be described in the context of a turbine engine. It will be appreciated that the present disclosure may have general applicability to any airfoil, including rotating or non-rotating airfoils, as well as to airfoils located anywhere within a turbine engine, including in a turbine section or a compressor section. The invention may also have general applicability in non-airfoil engine components as well as non-aircraft applications, such as other mobile applications and non-mobile industrial, commercial, and residential applications.
As used herein, the term "forward" or "upstream" refers to moving in a direction toward the engine inlet, or a component being relatively close to the engine inlet as compared to another component. The terms "rearward" or "downstream" are used with "forward" or "upstream" and refer to a direction toward the rear or outlet of the engine, or relatively closer to the engine outlet than another component.
As used herein, a "set" may include any number of the separately described elements, including only one element. Further, the terms "radial" or "radially" as used herein refer to a dimension extending between a central longitudinal axis of the engine and an outer engine circumference.
All directional references (e.g., radial, axial, proximal, distal, upper, lower, upward, downward, left, right, lateral, front, rear, top, bottom, above, below, vertical, horizontal, clockwise, counterclockwise, upstream, downstream, forward, rearward, etc.) are only used for identification purposes to aid the reader's understanding of the present disclosure, and do not create limitations, particularly as to the position, orientation, or use of the disclosure. Unless otherwise specified, connection references (e.g., attached, coupled, connected, and engaged) are to be construed broadly and may include intermediate members between a collection of elements and relative movement between members. Thus, joinder references do not necessarily infer that two elements are directly connected and in fixed relation to each other. The exemplary drawings are for illustrative purposes only and the dimensions, locations, order and relative sizes reflected in the accompanying drawings may vary.
FIG. 1 is a schematic cross-sectional view of a
The
An HP shaft or spool 48, coaxially disposed about the centerline 12 of the
The LP and
The
The HP and
The
In addition to the rotor portion, stationary portions of the
In operation, the airflow flowing from
A portion of pressurized
The remainder of
Some of the air supplied by
Referring now to FIG. 2, an airfoil assembly 95 that may be used in the
The airfoil 100 includes an outer wall 103, the outer wall 103 bounding an interior 104 and defining a
The airfoil assembly 95 may also include a platform 118, the platform 118 being coupled to the airfoil 100 at the root 114. In one example, the airfoil 100 is in the form of a blade extending from a dovetail 119, such as the HP turbine blade 68 of FIG. 1. In this case, platform 118 may form at least a portion of dovetail 119. In another example, the airfoil 100 may be in the form of a bucket, such as the LP turbine bucket 72, and the platform 118 may form at least a portion of an inner or outer band (not shown) coupled to the root 114.
Dovetail 119 may be configured to be mounted to turbine rotor disk 71 on
The plurality of
In another non-limiting example, the
The airfoil 100 may further include a cooling air circuit 125, the cooling air circuit 125 fluidly coupling the set of inlet passages 120 to the
A plurality of
The scalloped
Referring now to FIG. 3, the
The plurality of
In the example of fig. 3, the plurality of non-uniform
The
The first
It is further contemplated that the scalloped
The
Turning to FIG. 4, the
The wide
The illustrated variable width scalloped portion 190 is shown as having a
It is also contemplated that adjacent
In another example (not shown), it is contemplated that the scalloped
It should be understood that the centerline, contact point, transition surface, width and length of the scalloped
Further, while airfoil 100 is shown with a combination of non-uniform
A method of cooling an airfoil in a turbine engine includes supplying cooling air to an interior of the airfoil having a plurality of non-uniform scalloped portions (fig. 2-4) extending to near a trailing edge of the airfoil and a plurality of outlets (fig. 2), at least some of the scalloped portions being interposed between adjacent outlets. The method further includes exhausting the cooling air through a plurality of outlets. Optionally, the method may include defining an airflow outlet direction through at least one outlet of the plurality of outlets via a plurality of non-uniform scalloped portions, as shown in fig. 3.
Various aspects of the present disclosure provide various benefits, including that the local airflow through the outlet and near the trailing edge may be adjusted using non-uniform scalloped portions to provide airfoil cooling, mix the local airflow near the trailing edge, or purge stagnant air that may be located near the trailing edge. Further, the scalloped portions may provide a thinner trailing edge that is more efficient than conventional airfoil trailing edges, which may reduce the weight of the airfoil, improve the hole cooling of the airfoil, and improve the aerodynamic performance of the airfoil.
It should be understood that the application of the disclosed design is not limited to turbine engines having fan and booster sections, but is also applicable to turbojets and turboshafts.
To the extent not already described, the different features and structures of the various embodiments may be used in combination or substituted for one another as desired. That one feature is not shown in all embodiments, which does not mean that it cannot be so shown, but is done for simplicity of description. Thus, the various features of the different embodiments can be mixed and matched as desired to form new embodiments, whether or not such new embodiments are explicitly described. The present disclosure encompasses all combinations or permutations of features described herein.
This written description uses examples to disclose the invention, including the best mode, and also to enable any person skilled in the art to practice the invention, including making and using any devices or systems and performing any incorporated methods. The patentable scope of the invention is defined by the claims, and may include other examples that occur to those skilled in the art. Such other examples are intended to be within the scope of the claims if they have structural elements that do not differ from the literal language of the claims, or if they include equivalent structural elements with insubstantial differences from the literal languages of the claims.
Further aspects of the invention are provided by the subject matter of the following clauses:
1. an airfoil for a turbine engine, comprising: an outer wall bounding an interior and defining a pressure side and a suction side, the outer wall extending between a leading edge and a trailing edge to define a chordwise direction and between a root and a tip to define a span direction; a plurality of outlets extending to near the trailing edge; and a plurality of non-uniform scalloped portions extending along the trailing edge, wherein at least some of the non-uniform scalloped portions are between adjacent outlets.
2. The airfoil of any preceding claim, wherein the plurality of non-uniform scalloped portions comprise at least one of a non-uniform length, a non-uniform width, a non-uniform centerline, or a non-uniform geometry.
3. The airfoil of any preceding claim, wherein the plurality of non-uniform scalloped portions includes a long scalloped portion having a first length and a short scalloped portion having a second length less than the first length.
4. The airfoil of any preceding clause, wherein the plurality of non-uniform scalloped portions comprises a wide scalloped portion having a first width and a narrow scalloped portion having a second width less than the first width.
5. The airfoil of any preceding claim, wherein the plurality of non-uniform scalloped portions comprises a variable width scalloped portion having a first width at a first location and a second width at a second location.
6. The airfoil of any preceding claim, wherein the plurality of non-uniform scalloped portions comprises a transition surface located upstream of the trailing edge and joining two adjacent scalloped portions.
7. The airfoil of any preceding item, wherein the plurality of non-uniform scalloped portions comprises a first inclined scalloped portion having a first centerline extending in a span direction and a chordwise direction.
8. The airfoil of any preceding claim, wherein the plurality of non-uniform scalloped portions comprises a second skewed scalloped portion having a second centerline that is not aligned with the first centerline.
9. The airfoil of any preceding claim, wherein the plurality of non-uniform scalloped portions comprises smooth scalloped portions having rounded corners and sharp scalloped portions having sharp edges.
10. The airfoil of any preceding claim, wherein the outlet extends along the trailing edge and the plurality of non-uniform scalloped portions extend along at least one of the pressure side or the suction side.
11. An airfoil for a turbine engine, comprising: an outer wall bounding an interior and defining a pressure side and a suction side, the outer wall extending between a leading edge and a trailing edge to define a chordwise direction and between a root and a tip to define a span direction; a plurality of outlets extending to near the trailing edge; a plurality of scalloped portions extending along the trailing edge between adjacent outlets; and at least one contact point between two of the plurality of scalloped portions.
12. The airfoil of any preceding claim, wherein the first scalloped portion is located on a pressure side and the second scalloped portion is located on a suction side.
13. The airfoil of any preceding clause, wherein the at least one contact point is located at a trailing edge between the first scalloped portion and the second scalloped portion and is located across a span between adjacent outlets.
14. The airfoil of any preceding clause, wherein the first scalloped portion and the second scalloped portion are both located on one of the pressure side or the suction side, and the at least one point of contact is between the first scalloped portion and the second scalloped portion.
15. The airfoil of any preceding claim, wherein the at least one contact point is upstream of the trailing edge.
16. The airfoil of any preceding claim, wherein the at least one contact point further comprises a transition surface between two of the plurality of scalloped portions.
17. The airfoil of any preceding claim, wherein the transition surface extends across the trailing edge between the pressure side and the suction side.
18. The airfoil of any preceding claim, wherein the transition surface extends at least in a span direction and is located on one of the pressure side or the suction side.
19. A method of cooling an airfoil in a turbine engine, the method comprising supplying cooling air to an interior of the airfoil, the airfoil having a plurality of non-uniform scalloped portions extending along a trailing edge of the airfoil and a plurality of outlets, wherein at least some of the non-uniform scalloped portions are interposed between adjacent outlets; and discharging the cooling air through a plurality of outlets.
20. The method of any preceding clause, further comprising defining an airflow outlet direction through at least one outlet of the plurality of outlets via a plurality of non-uniform scalloped portions.
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