CN209483431U - The blade of air film hole and gas turbine for gas turbines - Google Patents
The blade of air film hole and gas turbine for gas turbines Download PDFInfo
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- CN209483431U CN209483431U CN201822267752.0U CN201822267752U CN209483431U CN 209483431 U CN209483431 U CN 209483431U CN 201822267752 U CN201822267752 U CN 201822267752U CN 209483431 U CN209483431 U CN 209483431U
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- 238000001816 cooling Methods 0.000 claims abstract description 27
- 238000005452 bending Methods 0.000 claims description 6
- 238000004378 air conditioning Methods 0.000 abstract description 9
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- 230000000694 effects Effects 0.000 description 6
- 241000237509 Patinopecten sp. Species 0.000 description 5
- 235000020637 scallop Nutrition 0.000 description 5
- 239000000567 combustion gas Substances 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 4
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- 239000000463 material Substances 0.000 description 3
- 235000013399 edible fruits Nutrition 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
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- 239000007924 injection Substances 0.000 description 1
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Abstract
The utility model discloses a kind of air film hole for gas turbines and air film holes for gas turbines, the air film hole includes air inlet hole section and outlet hole section, the first end of the outlet hole section is connected to the second end of the air inlet hole section, the circumferential profile of the cross section of the outlet hole section is generally triangular and including the first arc section, second arc section and third arc section, first arc section, three angles of the second arc section and third arc section and triangle correspond, second arc section and the third arc section are mutually symmetrical, first arc section, second arc section passes through phase tangent section with the two neighboring arc section in third arc section and is connected, and the phase tangent section for connecting second arc section and the third arc section is arc segment and is bent towards first arc section.The air film hole for gas turbines of the utility model can reduce required air conditioning quantity, cooling performance be improved, to improve unit efficiency.
Description
Technical field
The utility model relates to technical field of gas turbine, more particularly to a kind of air film hole for gas turbines and tool
There is the blade of the gas turbine of air film hole.
Background technique
Gas turbine is the core equipment of the combustion gas power generator such as natural gas, synthesis gas, and gas turbine mainly includes pressure
Mechanism of qi, combustion chamber and turbine.Wherein, turbine blade is the critical component that high-temperature fuel gas thermal energy is converted into mechanical energy, according to mine-laying
Pause circulation theory, and the fuel gas temperature come out from combustion chamber is higher, and the overall thermal efficiency of gas turbine simple cycle is higher, however when height
When warm combustion gas has been more than turbine blade material tolerable temperature, the service life of turbine blade is seriously affected.For this purpose, in order to realize combustion gas wheel
High-temperature turbine blade need to be carried out cooling temperature control by machine efficiency power generation, and air conditioning quantity needed for blade is higher, and unit operation efficiency is lower,
Economy is poorer.
In the related technology, blade for gas turbines uses gaseous film control.However, gas turbine leaf in the prior art
The gaseous film control mode of piece, there are film overcast effect is poor, the problem that air film availability is low and required air conditioning quantity is mostly equal, reduction
Cooling performance and unit efficiency.
Summary of the invention
The utility model is intended to solve at least some of the technical problems in related technologies.
For this purpose, on the one hand the utility model proposes a kind of air film hole for gas turbines, the air film of the air film hole covers
Lid effect is good, improves air film availability, reduces required air conditioning quantity, improves cooling performance and unit efficiency.
On the other hand the utility model also proposed a kind of blade of gas turbine.
The air film hole for gas turbines of the embodiment of first aspect according to the present utility model includes: air inlet hole section,
The first end face of the air inlet hole section is obliquely installed；Outlet hole section, the first end of the outlet hole section and the air inlet hole section
Second end connection, the second end face of the outlet hole section is obliquely installed, and the cross-sectional area of the outlet hole section is along from the outlet
The direction of the first end of hole section towards the second end of the outlet hole section is gradually increased, the periphery of the cross section of the outlet hole section
Profile is generally triangular and including the first arc section, the second arc section and third arc section, first arc section, the second circle
Three angles of segmental arc and third arc section and the triangle correspond, and the second arc section and the third arc section are right each other
Claiming, the two neighboring arc section in first arc section, the second arc section and third arc section passes through phase tangent section and is connected,
And the phase tangent section for connecting second arc section and the third arc section is arc segment and curved towards first arc section
It is bent.
According to the air film hole for gas turbines of the utility model embodiment, by the way that outlet hole section is arranged to edge from institute
State the expansion segment that the direction of first end towards the second end of the outlet hole section of outlet hole section is gradually increased, and outlet hole section
The circumferential profile of cross section includes above-mentioned first arc section, the second arc section and third arc section, can improve film overcast effect
Fruit improves air film availability, and air conditioning quantity needed for reducing improves cooling performance, to improve unit efficiency.
In some embodiments, diameter of a circle where first arc section is d1, second arc section and described the
Diameter of a circle where three-arc section is d2, d2≤d1.
In some embodiments, the central axis of the circular in cross-section of the air inlet hole section, the air inlet hole section passes through
The center of circle of circle where first arc section.
In some embodiments, the outlet hole section by first plane institute's section shape at cross section in, first circular arc
Diameter of a circle where section is d1 and identical as the diameter of the air inlet hole section, wherein first plane passes through the outlet hole section
Second end face and the air inlet hole section central axis intersection point and be orthogonal to the central axis of the air inlet hole section.
In some embodiments, the outlet hole section by the first plane institute's section shape at cross section in, described first
The distance between center of circle of circle and the first arc section institute where the center of circle of circle where arc section and second arc section
It is L1, d1≤L1≤2d1 at a distance from where the round center of circle with the third arc section between the center of circle of circle.
In some embodiments, the air inlet hole section is cut by the second plane, wherein second plane by it is described into
The intersection point of the central axis of the first end face of stomata section and the air inlet hole section and the central axis for being orthogonal to the air inlet hole section；
The junction of the air inlet hole section and the outlet hole section is cut by third plane, and the third plane is orthogonal to the air inlet
The central axis of section, the distance between second plane and the third plane are L2, d1≤L2≤8d1.
In some embodiments, the distance between the third plane and first plane be L3,0.5d1≤L3≤
4d1。
In some embodiments, the center of circle in the center of circle of circle where first arc section and second arc section place circle
Between line and first arc section where circle the center of circle and the third arc section where circle the center of circle between line
Between angle be α, and 40 °≤α≤120 °.
In some embodiments, the phase tangent section for connecting first arc section and second arc section is the first tangent line
Section, the phase tangent section for connecting first arc section and the third arc section is the second tangent section, first tangent section and
At least one of described second tangent section is segmental arc or straightway.
In some embodiments, first tangent section and second tangent section are segmental arc and are mutually symmetrical.
In some embodiments, first tangent section is directed away from the direction bending of the third arc section, and described the
Two tangent sections are directed away from the direction bending of second arc section.
The blade of the gas turbine of the embodiment of second aspect according to the present utility model includes blade body, the blade body
Interior to have cooling duct, the blade body has outside wall surface and surrounds the inner wall of the cooling duct, sets on the blade body
There is the air film hole being connected to the cooling duct, the air film hole is gas for gas turbines described in any of the above-described embodiment
Fenestra, the air film hole are set relative to the direction inclination of the outside wall surface from the blade body towards the inner wall of the blade body
Set, and the first end face of the air inlet hole section is concordant with the outside wall surface of the blade body, the second end face of the outlet hole section with
The inner wall of the blade body is concordant.
In some embodiments, the air film hole is multiple, multiple air film hole arranged for interval.
Detailed description of the invention
Fig. 1 is the schematic diagram of the blade of the gas turbine of embodiment according to the present utility model.
Fig. 2 is the schematic diagram of the air film hole for gas turbines of embodiment according to the present utility model.
Fig. 3 is the schematic diagram of the air film hole for gas turbines of embodiment according to the present utility model, is shown
Import cross section and exit cross-section.
Fig. 4 is the cross section of the outlet hole section of the air film hole for gas turbines of embodiment according to the present utility model
The schematic diagram of circumferential profile.
Fig. 5 is the Longitudinal cross section schematic of the air film hole for gas turbines of embodiment according to the present utility model.
Fig. 6 is the availability and Flow Field Distribution of the air film hole for gas turbines of embodiment according to the present utility model
Schematic diagram.
Fig. 7 is the availability of existing scallop hole and the schematic diagram of Flow Field Distribution.
Fig. 8 is the availability of existing round hole and the schematic diagram of Flow Field Distribution.
Fig. 9 is the availability and mass flow ratio of the air film hole for gas turbines of embodiment according to the present utility model
Relational graph.
Appended drawing reference:
Blade body 1, the outside wall surface 11 of blade body, the inner wall 12 of blade body, cooling duct 2, air film hole 3, air inlet hole section
31, outlet hole section 32, exit cross-section 320, the first arc section 321, the second arc section 322, third arc section 323, first cuts
Line segment 324, the second tangent section 325, third tangent section 326, the first plane A, the second plane B, third plane C.
Specific embodiment
The embodiments of the present invention are described below in detail, examples of the embodiments are shown in the accompanying drawings.Below by
The embodiment being described with reference to the drawings is exemplary, it is intended to for explaining the utility model, and should not be understood as practical new to this
The limitation of type.In the description of the present invention, it should be understood that term " center ", " longitudinal direction ", " transverse direction ", " length ",
" width ", " thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside",
The orientation or positional relationship of the instructions such as " clockwise ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " is based on the figure
Orientation or positional relationship is merely for convenience of describing the present invention and simplifying the description, rather than the dress of indication or suggestion meaning
It sets or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to the utility model
Limitation.
Blade and air film hole for gas turbines according to the gas turbine of the utility model embodiment is described below.
As shown in Figure 1, including blade body 1, tool in blade body 1 according to the blade of the gas turbine of the utility model embodiment
There is cooling duct 2, blade body 1 has outside wall surface 11 and surrounds the inner wall 12 of cooling duct 2, and blade body 1 is equipped with air film hole
3, air film hole 3 is connected to cooling duct 2.In other words, the wall of 3 perfoliate-leaf sheet body 1 of air film hole is to be connected to cooling duct 2.It is cooling logical
Cooling air-flow in road 2 projects by air film hole 3 and is attached to the outside wall surface 11 of blade body 1, to realize 1 outer surface of blade body
Cooling.
In some embodiments, air film hole 3 is multiple, multiple 3 arranged for interval of air film hole.Further, multiple air film holes 3
Uniform intervals arrangement.In other words, the distance between adjacent air film hole 3 is identical." multiple " contain in the description of the present invention,
Justice is at least two, such as two, three etc., unless otherwise specifically defined.
Below with reference to the accompanying drawings 2-5 describes the air film hole for gas turbines according to the utility model embodiment.
It as shown in Figure 2-5, include air inlet hole section 31 according to the air film hole for gas turbines 3 of the utility model embodiment
With outlet hole section 32, wherein the first end face (left side of air inlet hole section 31 shown in Fig. 2) of air inlet hole section 31 is obliquely installed.It changes
Yan Zhi, as shown in Fig. 2, air inlet hole section 31 extends from left to right and inclination upwards, the left side of air inlet hole section 31 is relative to crosscutting
The plane of air inlet hole section 31 is tilted to the left predetermined angular.
Second end (Fig. 2 of first end (left end of outlet hole section 32 shown in Fig. 2) and air inlet hole section 31 of outlet hole section 32
Shown in air inlet hole section 31 right end) connection, the second end face (right side of outlet hole section 32 shown in Fig. 2) of outlet hole section 32
It is obliquely installed.In other words, as shown in Fig. 2, air inlet hole section 31 and outlet hole section 32 are arranged and communicated with each other from left to right, venthole
The right side of section 32 is tilted to the right predetermined angular relative to the plane of crosscutting outlet hole section 32.
The cross-sectional area of outlet hole section 32 along the first end from outlet hole section 32 towards outlet hole section 32 second end side
To being gradually increased.In other words, the cross-sectional area of outlet hole section 32 along being gradually increased from left to right, so that outlet hole section 32 is formed as
One expansion segment, in favor of the injection of air-flow.
As shown in Figure 3-4, the circumferential profile of the cross section of outlet hole section 32 is generally triangular and including the first arc section
321, the second arc section 322 and third arc section 323, the first arc section 321, the second arc section 322 and third arc section 323 with
Three angles of triangle correspond.In other words, the circumferential profile of the cross section of outlet hole section 32 is similar to triangle and has three
A arc chord angle, the first arc section 321 form an arc chord angle of the circumferential profile of the cross section of outlet hole section 32, the second arc section
322 form another arc chord angle of the circumferential profile of the cross section of outlet hole section 32, and third arc section 323 forms outlet hole section 32
Cross section circumferential profile another arc chord angle.Term " first ", " second " are only used in the description of the present invention,
Purpose is described, relative importance is not understood to indicate or imply.
Wherein the second arc section 322 and third arc section 323 are mutually symmetrical.In other words, the cross section of outlet hole section 32
It is symmetrical relative to the first arc section 321 that circumferential profile is similar to isosceles triangle, the second arc section 322 and third arc section 323.
Two neighboring arc section in first arc section 321, the second arc section 322 and third arc section 323 passes through phase
Tangent section is connected.In other words, pass through a line segment connection, a line segment between the first arc section 321 and the second arc section 322
First end with the first end of the first arc section 321 is tangent is connected, the of the second end of a line segment and the second arc section 322
One end is tangent to be connected；It is connected between first arc section 321 and third arc section 323 by another phase tangent section, this another
The first end of line segment with the second end of the first arc section 321 is tangent is connected, the second end and third arc section of another line segment
322 first end is tangent to be connected；It is connected between second arc section 322 and third arc section 323 by another phase tangent section, it should
The first end of another phase tangent section with the second end of the second arc section 322 is tangent is connected, the second of another the phase tangent section
End with the second end of third arc section 323 is tangent is connected.
The phase tangent section for wherein connecting the second arc section 322 and third arc section 323 is arc segment and the first circular arc of direction
Section 321 is bent.In other words, another above-mentioned phase tangent section is arc-shaped, and towards the center curvature of triangle, i.e. another phase
The arc segment that tangent section does not outwardly protrude, the arc segment inwardly concaved.
According to the air film hole for gas turbines 3 of the utility model embodiment, by the way that outlet hole section 32 is arranged to edge
The expansion segment being gradually increased from the direction of first end towards the second end of outlet hole section 32 of outlet hole section 32, and outlet hole section 32
The circumferential profile of cross section include above-mentioned first arc section 321, the second arc section 322 and third arc section 323, can improve
Film overcast effect improves air film availability, and air conditioning quantity needed for reducing improves cooling performance, to improve unit efficiency.
Specifically, when above-mentioned air film hole 3 is applied in the blade according to the gas turbine of the utility model embodiment, air film
Hole 3 is obliquely installed relative to the direction of the outside wall surface 11 from blade body 1 towards the inner wall 12 of blade body 1, and air inlet hole section 31
First end face it is concordant with the outside wall surface 11 of blade body 1, the second end face of outlet hole section and the inner wall 12 of blade body 1 are concordant,
So that air film hole 3 penetrates through the wall of blade body 1.Since air film hole 3 is obliquely installed, it follows that 31 first end of air inlet hole section
Face is tilted relative to the plane of crosscutting air inlet hole section 31, and the second end face of outlet hole section 32 is relative to the flat of crosscutting outlet hole section 32
Face inclination.
For ease of understanding, the circumferential profile of the cross section of outlet hole section 32 may be interpreted as being formed by following procedure:
Three points are determined first, wherein 3 points can form isosceles triangle after line two-by-two；Secondly using three points as the center of circle
Make to justify respectively；It is made between adjacent two circle again with the tangent tangent line of two circles to connect two circles.Hereafter, three are got rid of respectively
Round inboard portion retains exterior portion；Remove the part between justifying two-by-two of stretching out of three tangent lines respectively, reservation justifies it two-by-two
Between part.The outer ring envelope for being located at the part between justifying two-by-two and surrounding of three round exterior portions and three tangent lines as a result,
Profile is closed, which is the circumferential profile for forming the cross section of outlet hole section 32.
In some embodiments, as shown in figure 4,321 place diameter of a circle of the first arc section is d1, the second arc section 322
It is d2, d2≤d1 with the diameter of a circle where third arc section 323.
In some embodiments, as shown in figure 3, the circular in cross-section of air inlet hole section 31, the central axis of air inlet hole section 31
Line passes through the center of circle of circle where the first arc section 321.In other words, air inlet hole section 31 is round tube, circle where the first arc section 321
The center of circle be located on the central axis of air inlet hole section 31, i.e., the diameter of air inlet hole section 31 with where the first arc section 321 circle it is straight
Diameter is identical.
Further, air inlet hole section 31 is permanent diameter section.The diameter of air inlet hole section 31 is permanent along the extending direction of air inlet hole section 31
It is fixed.In other words, the diameter of air inlet hole section 31 is all the same in any position of air inlet hole section 31.
In some embodiments, as shown in Figure 3-4, outlet hole section 32 by first plane A institute's section shape at cross section in,
One arc section, 321 place diameter of a circle is d1 and identical as the diameter of air inlet hole section 31, wherein the first plane A passes through outlet hole section
The intersection point of the central axis of 32 second end face (right side of venthole section shown in Fig. 3 32) and air inlet hole section 31 and be orthogonal into
The central axis of stomata section 31.In other words, as shown in figure 3, the central axis of air inlet hole section 31 Jing Guo outlet hole section 32 first
The center of circle of circle is pierced by the right side of outlet hole section 32, central axis of the first plane A perpendicular to air inlet hole section 31 where arc section 321
Intersection point between line and the central axis Jing Guo air inlet hole section 31 and the right side of outlet hole section 32, outlet hole section 32 are flat first
Projection on the A of face formed outlet hole section 32 by first plane A institute's section shape at cross section, in the rank street face, the first arc section
321 place diameter of a circles are identical as the diameter of air inlet hole section 31, and are d1.
Further, outlet hole section 32 by first plane A institute's section shape at rank street face in, where the first arc section 321 circle
The center of circle and the second arc section 322 where the distance between center of circle of circle and the center of circle and the of circle where the first arc section 321
The distance between center of circle of circle where three-arc section 323 is L1, d1≤L1≤2d1.In other words, as shown in Figure 3-4, outlet hole section
32 in the projection on the first plane A, the center of circle of circle where the center of circle of circle where the first arc section 321 and the second arc section 322
The distance between the distance between center of circle phase with circle where the center of circle of circle where the first arc section 321 and third arc section 323
It together, and is L1.And the relationship between 321 place diameter of a circle d1 of L1 and the first arc section are as follows: d1≤L1≤2d1.
In some embodiments, as shown in Fig. 3,5, air inlet hole section 31 is cut by the second plane B, wherein the second plane B is passed through
Cross the friendship of the first end face (left side of air inlet hole section 31 shown in Fig. 3) of air inlet hole section 31 and the central axis of air inlet hole section 31
Point and the central axis for being orthogonal to air inlet hole section 31；The junction of air inlet hole section 31 and outlet hole section 32 is cut by third plane C,
Third plane C is orthogonal to the central axis of air inlet hole section 31, and the distance between the second plane B and the third plane C are L2, d1
≤L2≤8d1。
In other words, as shown in Fig. 3,5, the left side of air inlet hole section 31, which intersects to have with the central axis of air inlet hole section 31, is handed over
Point, the second plane B perpendicular to air inlet hole section 31 central axis and pass through the intersection point, throwing of the air inlet hole section 31 in the second plane B
Shadow be circle, i.e., air inlet hole section 31 by second plane B institute's section shape at circular in cross-section.
Third plane C is by the junction of air inlet hole section 31 and outlet hole section 32 and perpendicular to the central axis of air inlet hole section 31
Line, air film hole 3 are projected as circle on third plane C.Wherein the distance between the second plane B and third plane C are L2, should
Relationship of the distance with outlet hole section 32 between the 321 place diameter of a circle d1 of the first arc section in the projection on the first plane A
Are as follows: d1≤L2≤8d1.
Further, the distance between third plane C and the first plane A are L3,0.5d1≤L3≤4d1.
In some embodiments, where the first arc section 321 circle the center of circle and the second arc section 322 where circle the center of circle it
Between line and the first arc section 321 where circle the center of circle and third arc section 323 where circle the center of circle between line between
Angle be α, and 40 °≤α≤120 °.
In some embodiments, the phase tangent section for connecting the first arc section 321 and the second arc section 322 is the first tangent section
324, the phase tangent section for connecting the first arc section 321 and third arc section 323 is the second tangent section 325,324 He of the first tangent section
At least one of second tangent section 325 is segmental arc or straightway.
In other words, the first tangent section 324 and the first arc section 321 and the tangent connection of the second arc section 322, the second tangent section
325 and first arc section 321 and the tangent connection of third arc section 323, and the first tangent section 324 and/or the second tangent section 325 can
, can also be linear with arc-shaped, and the utility model is not limited to this.
It is understood that if the tangent section for defining the second arc section 322 of connection and third arc section 323 is third tangent line
Section 326, third tangent section 326 are arc segment and are bent towards the first arc section 321.
Wherein in the embodiment shown in Fig. 2-3, the first tangent section 324 and the second tangent section 325 are segmental arc.Change speech
It, the first tangent section 324 and the second tangent section 325 are arc-shaped.Further, the first tangent section 324 and the second tangent section 325
Be mutually symmetrical arrangement.
In some specifically embodiments, the first tangent section 324 is directed away from the direction bending of third arc section 323, the
Two tangent sections 325 are directed away from the direction bending of the second arc section 322.In other words, the first tangent section 324 and the second tangent section
325 towards the center curvature of triangle, i.e. its arc segment not outwardly protruded, the arc segment inwardly concaved.
Below with reference to the accompanying drawings 1-5 describes the blade of the gas turbine according to the utility model specific embodiment.
It as shown in Figs. 1-5, include blade body 1 according to the blade of the gas turbine of the utility model embodiment, in blade body 1
With the cooling duct 2 that the high direction of leaf along blade body 1 extends, blade body 1 has outside wall surface 11 and surrounds the interior of cooling duct 2
Wall surface 12, blade body 1 are equipped with multiple air film holes 3 equally spaced from each other.
The wall of 3 perfoliate-leaf sheet body 1 of air film hole, so that air film hole 3 is connected to cooling duct 2.Specifically, air film hole 3 prolongs
The direction for stretching direction relative to the outside wall surface 11 from blade body 1 towards the inner wall 12 of blade body 1 is obliquely installed, and air film hole 3
Outer end face it is concordant with the outside wall surface 11 of blade body 1, the inner face of air film hole 3 and the inner wall 12 of blade body 1 are concordant.As a result,
Cooling air-flow in cooling duct 2 projects by air film hole 3 and is attached to the outside wall surface 11 of blade body 1, to realize blade body 1
The cooling of outer surface.
As shown in Fig. 2, air film hole 3 includes the air inlet hole section 31 and outlet hole section 32 being sequentially arranged from left to right, air inlet
Section 31 is permanent diameter section and cross section is circle, and the left side of air inlet hole section 31 is the outer end face of air film hole 3, due to air film hole 3
It is obliquely installed, therefore the left side of air inlet hole section 31 is obliquely installed relative to the plane of crosscutting air inlet hole section 31 and in approximate ellipse
Shape.
The cross-sectional area of outlet hole section 32 is gradually increased from left to right to be formed and gradually expand section to the right from sitting down, venthole
The circumferential profile of the cross section of section 32 is substantially in isosceles triangle, and the circumferential profile of the cross section of outlet hole section 32 includes the first circle
Segmental arc 321, the first tangent section 324, the second arc section 322, the second tangent section 325, third arc section 323 and third tangent section
326, wherein three angles of the first arc section 321, the second arc section 322 and third arc section 323 and triangle correspond, and
Second arc section 322 and third arc section 323 are mutually symmetrical.
First tangent section, 324 the first arc section 321 of tangent connection and the second arc section 322, the second tangent section 325 with it is tangent
The first arc section 321 and third arc section 323 are connected, and the first tangent section 324 and the second tangent section 325 are mutually symmetrical, first
Tangent section 324 and the second tangent section 325 are arc-shaped and be directed away from the bending of the direction at the center of triangle, i.e., both outside
Protrusion.The second arc section 322 of tangent connection of third tangent section 326 and third arc section 323, and third tangent section 326 is arc-shaped
And towards the center curvature of triangle, i.e., it is inwardly concaved.
The diameter of air inlet hole section 32 is d1, and the central axis of air inlet hole section 31 is by circle where the first arc section 321
The center of circle.Air inlet hole section 31 is cut by the second plane B, wherein left side of the second plane B Jing Guo air inlet hole section 31 and air inlet hole section
Intersection point between 31 central axis and perpendicular to the central axis of air inlet hole section 31, throwing of the air inlet hole section 31 in the second plane B
Shadow is circle.
The junction of air inlet hole section 31 and outlet hole section 32 is cut by third plane C, and third plane C is perpendicular to air inlet
The central axis of section 31, air film hole 3 are projected as circle on third plane C.
Outlet hole section 32 is cut by the first plane A, right side of the first plane A Jing Guo outlet hole section 32 and air inlet hole section 31
Central axis intersection point and perpendicular to the central axis of air inlet hole section 31.
For outlet hole section 32 in the projection of the first plane A, 321 place diameter of a circle of the first arc section is also d1, i.e., with into
The diameter of stomata section 31 is identical.Second arc section, 321 place diameter of a circle is d2, wherein d2≤d1.Where first arc section 321
The center of circle of circle where the distance between center of circle of circle where the round center of circle and the second arc section 322 and the first arc section 321 and the
The distance between center of circle of circle is identical where three-arc section 323, and is L1, wherein d1≤L1≤2d1.Second plane B and institute
Stating the distance between third plane C is L2, wherein d1≤L2≤8d1.The distance between third plane C and the first plane A are L3,
Wherein 0.5d1≤L3≤4d1.Where the center of circle of circle where first arc section 321 and the second arc section 322 between the center of circle of circle
The folder between line where the center of circle of circle where line and the first arc section 321 and third arc section 323 between the center of circle of circle
Angle is α, and 40 °≤α≤120 °.
Air film hole and traditional circular hole and fan-shaped pore structure to embodiment according to the present utility model carry out numerical value respectively
Simulation, with from flow field structure, film overcast structure, air film availability etc. is compared and analyzed, as illustrated in figs. 5-7.
Wherein, air film availability is shown below:
Wherein, TgFor mainstream fuel gas temperature, TawFor blade surface covering cold air temperature, T under the conditions of gaseous film controlcFor gas
Fenestra flows out temperature.
By being analyzed with film overcast effect three kinds of air film hole flow fields, no matter imitated in flow field structure and film overcast
Fruit has improvement, comparison diagram 6 and Fig. 7, the air film hole of embodiment according to the present utility model relative to traditional scallop hole, according to
The low film region of the adjacent holes of the air film hole of the embodiments of the present invention is significantly less than scallop hole, has to Film Cooling brighter
Aobvious diffusion slowing effect, improves air film availability.Similarly, comparison diagram 6 and Fig. 8, the air film of embodiment according to the present utility model
Hole is also significantly better than traditional round hole.
Film overcast region mean availability effectiveness is compared with cold air magnitude relation as shown in figure 9, identical cold air mass flow ratio item
Under part, the air film hole of the embodiment according to the present utility model air film availability that is averaged is above traditional scallop hole and round hole；
The air film hole of contrast table 1, embodiment according to the present utility model is at least above traditional fan in identical air conditioning quantity air film availability
Shape hole 10%, at least above traditional round air film hole 25%.
Wherein mass flow ratio is shown below:
Wherein mc is cold air import mass flow, and mg is mainstream combustion gas quality flow.
The relationship of table 1 blade air film availability and mass flow ratio
| MFR [%] | Novel air fenestra | Round air film hole | Fan-shaped air film hole |
| 0.5 | 0.0938 | 0.0730 | 0.0832 |
| 0.7 | 0.1123 | 0.0845 | 0.0933 |
| 0.9 | 0.1214 | 0.0908 | 0.1030 |
| 1 | 0.1223 | 0.0919 | 0.1081 |
It to sum up analyzes, the more traditional circular hole of the air film hole of embodiment according to the present utility model has with scallop hole significantly to be mentioned
Blade air conditioning quantity demand can be effectively reduced in height, the blade for combustion engine, to reduce combustion engine turbine air conditioning quantity demand, improves machine
Group efficiency, improves economy.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is contained at least one embodiment or example of the utility model.In the present specification, to the schematic table of above-mentioned term
It states and is necessarily directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be with
It can be combined in any suitable manner in any one or more of the embodiments or examples.In addition, without conflicting with each other, this field
Technical staff can by the feature of different embodiments or examples described in this specification and different embodiments or examples into
Row combination and combination.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " Gu
It is fixed " etc. terms shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be
Mechanical connection is also possible to be electrically connected or can communicate each other；It can be directly connected, the indirect phase of intermediary can also be passed through
Even, the connection inside two elements or the interaction relationship of two elements be can be, unless otherwise restricted clearly.For this
For the those of ordinary skill in field, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.
In the present invention unless specifically defined or limited otherwise, fisrt feature is in the second feature " on " or " down "
It can be that the first and second features directly contact or the first and second features are by intermediary mediate contact.Moreover, first is special
Sign can be fisrt feature above the second feature " above ", " above " and " above " and be directly above or diagonally above the second feature, or only
Indicate that first feature horizontal height is higher than second feature.Fisrt feature under the second feature " below ", " below " and " below " can be with
It is that fisrt feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.
Although the embodiments of the present invention have been shown and described above, it is to be understood that above-described embodiment is
Illustratively, it should not be understood as limiting the present invention, those skilled in the art are in the scope of the utility model
Inside it can make changes, modifications, alterations, and variations to the above described embodiments.
Claims (13)
1. a kind of air film hole for gas turbines characterized by comprising
The first end face of air inlet hole section, the air inlet hole section is obliquely installed；
Outlet hole section, the first end of the outlet hole section are connected to the second end of the air inlet hole section, and the of the outlet hole section
Biend is obliquely installed, and the cross-sectional area of the outlet hole section is along from the first end of the outlet hole section towards the outlet hole section
The direction of second end be gradually increased, the circumferential profile of the cross section of the outlet hole section is generally triangular and including the first circle
Segmental arc, the second arc section and third arc section, first arc section, the second arc section and third arc section and the triangle
Three angles correspond, second arc section and the third arc section be mutually symmetrical, first arc section, the second circle
Segmental arc passes through phase tangent section with the two neighboring arc section in third arc section and is connected, and connects second arc section and institute
The phase tangent section for stating third arc section is arc segment and is bent towards first arc section.
2. air film hole for gas turbines according to claim 1, which is characterized in that circle where first arc section
Diameter be d1, diameter of a circle where second arc section and the third arc section is d2, d2≤d1.
3. air film hole for gas turbines according to claim 1, which is characterized in that the cross section of the air inlet hole section
Rounded, the central axis of the air inlet hole section is by the center of circle round where first arc section.
4. air film hole for gas turbines according to claim 2, which is characterized in that the outlet hole section is flat by first
Face institute's section shape at cross section in, diameter of a circle where first arc section is d1 and the diameter phase with the air inlet hole section
Together, wherein the intersection point of the central axis of second end face of first plane Jing Guo the outlet hole section and the air inlet hole section and
It is orthogonal to the central axis of the air inlet hole section.
5. air film hole for gas turbines according to claim 4, which is characterized in that the outlet hole section is by described
One plane institute's section shape at cross section in, the circle of circle where the center of circle of circle where first arc section and second arc section
Where the center of circle of circle where the distance between heart and first arc section and the third arc section between the center of circle of circle
Distance is L1, d1≤L1≤2d1.
6. air film hole for gas turbines according to claim 4, which is characterized in that the air inlet hole section is flat by second
Face is cut, wherein the friendship of the central axis of first end face of second plane Jing Guo the air inlet hole section and the air inlet hole section
Point and the central axis for being orthogonal to the air inlet hole section；The junction of the air inlet hole section and the outlet hole section is by third plane
It cuts, the third plane is orthogonal to the central axis of the air inlet hole section, between second plane and the third plane
Distance be L2, d1≤L2≤8d1.
7. air film hole for gas turbines according to claim 6, which is characterized in that the third plane and described
The distance between one plane is L3,0.5d1≤L3≤4d1.
8. air film hole for gas turbines according to claim 1, which is characterized in that circle where first arc section
The center of circle and second arc section where circle the center of circle between line and first arc section where circle the center of circle and institute
The angle between line where stating third arc section between the center of circle of circle is α, and 40 °≤α≤120 °.
9. air film hole for gas turbines according to claim 1 to 8, which is characterized in that connection described the
The phase tangent section of one arc section and second arc section is the first tangent section, connects first arc section and third circle
The phase tangent section of segmental arc is the second tangent section, and at least one of first tangent section and second tangent section are segmental arc
Or straightway.
10. air film hole for gas turbines according to claim 9, which is characterized in that first tangent section and institute
The second tangent section is stated to be segmental arc and be mutually symmetrical.
11. air film hole for gas turbines according to claim 10, which is characterized in that the first tangent section direction
Direction far from the third arc section is bent, and second tangent section is directed away from the direction bending of second arc section.
12. a kind of blade of gas turbine, which is characterized in that including blade body, there is cooling duct in the blade body, it is described
Blade body has outside wall surface and surrounds the inner wall of the cooling duct, and the blade body is equipped with and is connected to the cooling duct
Air film hole, the air film hole be air film hole for gas turbines of any of claims 1-11, the air film
Hole is obliquely installed relative to the direction of the outside wall surface from the blade body towards the inner wall of the blade body, and the air inlet
The first end face of section is concordant with the outside wall surface of the blade body, the second end face of the outlet hole section and the inner wall of the blade body
Face is concordant.
13. the blade of gas turbine according to claim 12, which is characterized in that the air film hole is multiple, Duo Gesuo
State air film hole arranged for interval.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822267752.0U CN209483431U (en) | 2018-12-29 | 2018-12-29 | The blade of air film hole and gas turbine for gas turbines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822267752.0U CN209483431U (en) | 2018-12-29 | 2018-12-29 | The blade of air film hole and gas turbine for gas turbines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209483431U true CN209483431U (en) | 2019-10-11 |
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ID=68129545
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822267752.0U Active CN209483431U (en) | 2018-12-29 | 2018-12-29 | The blade of air film hole and gas turbine for gas turbines |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209483431U (en) |
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2018
- 2018-12-29 CN CN201822267752.0U patent/CN209483431U/en active Active
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