CN205445689U - Efficiency of film cooling is improved structure - Google Patents
Efficiency of film cooling is improved structure Download PDFInfo
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- CN205445689U CN205445689U CN201620299735.3U CN201620299735U CN205445689U CN 205445689 U CN205445689 U CN 205445689U CN 201620299735 U CN201620299735 U CN 201620299735U CN 205445689 U CN205445689 U CN 205445689U
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- wall
- following current
- air film
- ladder
- film hole
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Abstract
The utility model relates to an efficiency of film cooling is improved structure, including air film hole, transversely fluting and wall, the air film hole is established at the upper reaches of wall regionally, transversely offers in the exit in air film hole, and the following current ladder has been offered to the intermediate position of this structure of its characterized in that on the cell wall of horizontal grooved low reaches, at the both sides of following current ladder symmetrical arrangement water conservancy diversion face, the following current ladder is in face of the plane perpendicular to wall of incoming flow orientation, the minimum of following current ladder and peak respectively with horizontal grooved bottom surface and low reaches wall parallel and level, central line that the following current ladder used air film hole venthole center and was on a parallel with the wall is axle symmetrical arrangement, is the water conservancy diversion face for to be 15 with the wall 75 the slope of contained angle, a ladder of following current ladder 0.25 along the wall exhibition to the vertical length of the biggest projection of direction and the ratio in air film hole aperture 1.0, is the following current ladder 1.0 at the ratio in the biggest projected length along the horizontal direction of wall and air film hole aperture 4.0.
Description
Technical field
This utility model relates to combustion gas turbine heat transfer and cooling technology field, is specifically related to a kind of structure improving gas film cooling efficiency.
Background technology
At present, combustion gas turbine is widely used in aviation, navigation, transportation and thermal power generation, and its development represents a national scientific and technological level, military developments and national comprehensive strength.For improving the economy of combustion gas turbine further, most effective of which method is to improve the entrance initial temperature of combustion gas turbine, but owing to being limited by exotic material, the entrance initial temperature of combustion gas turbine should use some effective measures to reduce the operating ambient temperature of high-temperature component after improving, and ensures, with this, the operation that combustion gas turbine is safe and reliable.In the cooling system of combustion gas turbine, it is the most extensive that air film cooling technology is applied.
Prior art research shows that fluting film hole structure can be effectively improved gas film cooling efficiency, and fluting can reduce the momentum of air film hole exit cooling air-flow, reduces the cooling gas penetration power to main flow, raising wall gas film cooling efficiency.As the Chinese patent of Patent No. ZL200710017790.4 discloses a kind of grooving gaseous film cooling hole; this film cooling holes includes the first translot and the second translot; first translot is provided with wedge angle tongue piece; ensure that cooling gas horizontal proliferation in the first translot; but for the horizontal cooling protection limited use in translot downstream, during operating mode when air blowing ratio is more than 1.0, cooling effect is decreased obviously.
Utility model content
For the weak point of existing structure, the technical problem that this utility model intends to solve is to provide a kind of structure improving gas film cooling efficiency.This structure is in order to increase the cooling gas area coverage at air film hole downstream wall, improve wall to open up to (x positive axis direction) gas film cooling efficiency, and improve wall laterally (y-axis direction) cooling effectiveness, it is adaptable to the air film cooling technology of all types of discrete holes distribution forms with notching construction.
This utility model solves described technical problem and be the technical scheme is that a kind of structure improving gas film cooling efficiency of offer, including air film hole, transversal slotting and wall, air film hole is located at the upstream region of wall, transversal slotting is opened in the exit of air film hole, it is characterized in that this structure centre position on the downstream cell wall of transversal slotting offers following current ladder, lateral symmetry at following current ladder arranges guide face, described following current ladder is perpendicular to wall in face of the plane carrying out flow path direction, the minimum point of following current ladder is concordant with the bottom surface of transversal slotting and downstream wall respectively with peak, following current ladder is to cross air film hole venthole center and to be parallel to the centrage of wall for axial symmetry layout；Described guide face is to be the slope of 15 ° of-75 ° of angles with wall, one ladder of described following current ladder is being 0.25-1.0 along the maximal projection longitudinal length of wall spanwise direction and the ratio in air film hole aperture, and following current ladder is being 1.0-4.0 along the maximal projection length of wall horizontal direction and the ratio in air film hole aperture；Guide face is 1.0-4.0 with the transverse width of bottom surface intersecting lens and the ratio in air film hole aperture of transversal slotting.
Compared with prior art (being only designed with notching construction at air film hole), this utility model has offered following current ladder and guide face (slope) on the basis of transversal slotting film hole structure on the cell wall of notching construction downstream, following current ladder can reduce the resistance flowed cooling gas in wall spanwise direction of slotting, reduce the cooling gas penetration power to main flow, cooling gas is made to flow closer to wall, reduce the intensity of reverse vortex pair, improve wall exhibition to cooling effectiveness.The guide face of following current ladder both sides, reduces the blending of main flow and cooling gas, the cooling gas in groove plays the effect of water conservancy diversion, thus improves the horizontal gas film cooling efficiency of wall.This utility model arranges following current ladder at fluting and slope does not haves the phenomenon causing wall gas film cooling efficiency to be decreased obviously when being more than 1.0 because of air blowing ratio.Additionally, the structure proposed in this utility model also has easily processing, the plurality of advantages such as economical and practical, especially in terms of the cooling protection of gas turbine blade and end wall thereof, the application needs in Practical Project can be met, thus improve component life and cost-effective.
Accompanying drawing explanation
Fig. 1 this utility model improves the overall structure schematic diagram of the structure of gas film cooling efficiency；
Fig. 2 this utility model improves a kind of embodiment plan structure schematic diagram of the structure of gas film cooling efficiency；
Fig. 3 this utility model improves a kind of embodiment main TV structure schematic diagram of the structure of gas film cooling efficiency；
Fig. 4 this utility model improves a kind of embodiment left view structural representation of the structure of gas film cooling efficiency；
Fig. 5 fluting of the present utility model 2 improves the principle schematic of gas film cooling efficiency；
Fig. 6 air blowing ratio is the cooling effectiveness profiles versus figure under conditions of 0.5, and wherein, Fig. 6 a is the air film hole downstream wall cooling effectiveness distribution of existing structure, and Fig. 6 b is air film hole downstream of the present utility model wall cooling effectiveness distribution；
When Fig. 7 air blowing ratio is 0.5, existing structure and the comparison of cooling effectiveness on the wall centrage of air film hole downstream of the present utility model；
When Fig. 8 air blowing ratio is 0.5, Fig. 8 a is existing structure and this utility model comparison of gas film cooling efficiency at the horizontal x/d=5 of wall, and Fig. 8 b is existing structure and this utility model comparison of gas film cooling efficiency at the horizontal x/d=10 of wall；
The overall structure schematic diagram that top view is right-angled trapezium of guide face 22 in the structure of Fig. 9 this utility model raising gas film cooling efficiency；
Figure 10 this utility model improves the step number of following current ladder 21 in the structure of gas film cooling efficiency and is 1 and has the overall structure schematic diagram of step of inclined surface；
In figure, 1-air film hole, 2-transversal slotting (or fluting), 3-wall, 11-air film hole venthole, 21-following current ladder, 22-guide face.
Detailed description of the invention:
Below in conjunction with specific embodiments and the drawings, structure of the present utility model is further described, but does not limit this utility model scope of the claims with this.
This utility model improves the structure of gas film cooling efficiency and (is called for short structure, see Fig. 1-4) include air film hole 1, transversal slotting 2 and wall 3, air film hole 1 is located at the upstream region of wall 3, transversal slotting 2 is opened in the exit of air film hole 1, centre position on the downstream cell wall of transversal slotting 2 offers following current ladder 21, lateral symmetry at following current ladder 21 arranges guide face 22, described following current ladder is perpendicular to wall in face of the plane carrying out flow path direction, the minimum point of following current ladder is concordant with the bottom surface of transversal slotting 2 and downstream wall 3 respectively with peak, following current ladder 21 is to cross air film hole venthole 11 center and to be parallel to the centrage of wall 3 for axial symmetry layout；Described guide face 22 is and the wall 3 slope in 15 ° of-75 ° of angles, and a ladder of described following current ladder 21 is at the maximal projection longitudinal length L along wall spanwise direction (i.e. X positive direction)1Being 0.25-1.0 with the ratio of air film hole aperture d, the following current ladder ratio in maximal projection length and air film hole aperture along wall horizontal direction (i.e. Y-direction) is 1.0-4.0；Guide face 22 is 1.0-4.0 with the ratio of the transverse width w and air film hole aperture d of the bottom surface intersecting lens of transversal slotting 2.
The ladder number being further characterized by described following current ladder 21 of the present utility model is 1-5.
The geomery of each ladder being further characterized by described following current ladder 21 of the present utility model is identical.
The longitudinal section being further characterized by described 21 1 ladders of following current ladder of the present utility model be shaped as rectangle, semicircle, half elliptic or trapezoidal.
The top view shapes being further characterized by described guide face 22 of the present utility model is trapezoidal.
The longitudinal section shape (i.e. front view shape) being further characterized by described guide face 22 of the present utility model is curl right-angled trapezium or polygon right-angled trapezium.
Of the present utility model be further characterized by described air film hole 1 be cylindrical hole, the geometry polygonal hole such as bellmouth, rectangular opening, trapezoidal hole, crescent hole or dust-pan shaped hole.
The ratio of groove width c being further characterized by described transversal slotting 2 of the present utility model and air film hole aperture d is 2-6, and groove depth H of transversal slotting 2 and the ratio of air film hole aperture d are 0.2-1.
Described air film hole 1 angle α with respect to the horizontal plane that is further characterized by of the present utility model is 15 °-60 °, and the ratio e/d of the lateral length e of described wall 3 and air film hole aperture d is 3-10.
In this utility model, ladder quantity and the stairstepping of following current ladder are relevant with concrete operating mode, the geomery of each ladder may be the same or different, but to ensure whole following current ladder minimum point concordant with the bottom surface of transversal slotting 2 and downstream wall 3 respectively with peak.
nullThe following current ladder 21 arranged on the downstream cell wall of transversal slotting 2 in this utility model and guide face 22 can improve the ultimate principle (seeing Fig. 5) of air film hole downstream wall gas film cooling efficiency: arrange following current ladder 21 on the downstream cell wall of fluting 2，Reduce the downstream cell wall resistance to cooling down gas m from air film hole outflow，Reduce the cooling gas momentum in wall vertical direction (z direction)，Reduce the cooling gas penetration power to main flow，And reduce cooling gas wall exhibition to flowing velocity，Cooling gas is made preferably to spread on wall，Improve the cooling effectiveness of wall central area，Slant leading surface 22 is arranged in following current ladder 21 both sides，Cooling gas flows out from air film hole，And meet with main flow gas phase in fluting 2，This portion gas s temperature is less than mainstream gas，Wall both sides are entered by guide face 22，The cooling effectiveness that wall is horizontal is played the effect of superposition.
In this utility model, air film hole 1 can be the geometry polygonal hole such as cylindrical hole, bellmouth, rectangular opening, trapezoidal hole, crescent hole or dust-pan shaped hole, air film hole 1 in laterally (y direction) in arranged in rows, air film hole 1 and horizontal wall surface angle α are 15 °-60 °, the ratio e/d of the lateral length e and air film hole aperture d of wall 3 is between 3.0-10, this utility model structure is applicable to the wall of various favorable pressure gradient, including the curved surface such as concave surface, convex surface, it is that between 0.25-1.5, cooling effectiveness is significantly improved at air blowing ratio.
This utility model arranges following current ladder 21 and the cooling effectiveness of guide face 22 beneficially raising wall on the cell wall of transversal slotting 2 downstream, following current ladder 21 reduces the blending of cooling gas and main flow, cooling gas is made to flow along wall 3, cooling gas flows through wall 3 along guide face 22 in groove, improve wall exhibition to and horizontal gas film cooling efficiency.The feature of this structure is the ladder quantity of following current ladder 21, the geomery of each ladder, the inclination angle beta of guide face 22, the plan view shape of guide face 22 and the shape of longitudinal section, and above parameter plays vital effect to cooling gas at flowing, the formation size of vorticity, turbulence intensity and the cooling effectiveness of downstream wall.According to experimental result, the following several requirement that is designed with to smooth ladder 21 and guide face 22: first, the ladder height h of following current ladder 21 is unsuitable too high, otherwise do not have the momentum reducing cooling gas in vertical walls, the cooling gas penetration power to main flow can not be effectively reduced, ladder height h increases according to cooling gas velocity and increases, and reduces along with the reduction of cooling gas velocity；Second, the step number of following current ladder 21 is unsuitable too much, and cooling gas too much can be caused bigger aerodynamic loss by step number, reduce cooling gas wall exhibition to cooling effectiveness；3rd, guide face 22 is unsuitable with the angle β of wall 3 excessive, and the excessive guide functions to the cooling gas in groove of β reduces, and this portion gas can not well be attached on wall flowing, above wall both sides, form bigger reverse vortex pair, reduce wall gas film cooling efficiency；4th, guide face 22 is unsuitable with the transverse width w of the bottom surface intersecting lens of transversal slotting 2 too small, does not otherwise have the effect strengthening the horizontal cooling effect of wall.
Embodiment 1
The present embodiment structure (seeing Fig. 1-4) includes air film hole 1, transversal slotting 2 and wall 3, air film hole 1 is located at the upstream region of wall 3, transversal slotting 2 is opened in the exit of air film hole 1, centre position on the downstream cell wall of transversal slotting 2 offers following current ladder 21, lateral symmetry at following current ladder 21 arranges guide face 22, described following current ladder is perpendicular to wall in face of the plane carrying out flow path direction, the minimum point of following current ladder is concordant with the bottom surface of transversal slotting 2 and downstream wall 3 respectively with peak, following current ladder 21 is to cross air film hole venthole 11 center and to be parallel to the centrage of wall 3 for axial symmetry layout；Described guide face 22 is and the wall 3 slope in 15 ° of-75 ° of angles, and a ladder of described following current ladder 21 is at the maximal projection longitudinal length L along wall spanwise direction (i.e. X positive direction)1Being 0.25-1.0 with the ratio of air film hole aperture d, the following current ladder ratio in maximal projection length and air film hole aperture along wall horizontal direction (i.e. Y-direction) is 1.0-4.0；Guide face 22 is 1.0-4.0 with the ratio of the transverse width w and air film hole aperture d of the bottom surface intersecting lens of transversal slotting 2.
Fig. 2-4 is the top view of structure shown in Fig. 1 respectively, front view and left view, at Fig. 2, in Fig. 3 and Fig. 4, three flow directions use coordinate X respectively, Y, Z represents, X is the flow direction of fluid, i.e. longitudinally, X positive axis is downstream direction, Y is horizontal, Z is vertical walls direction, the aperture d of air film hole 1 represents, air film hole 1 is α relative to the angle of horizontal wall surface, groove width c of transversal slotting 2 represents, the height H of transversal slotting 2 represents, the lateral length e of wall 3 represents, the height h of one ladder of following current ladder 21 represents, following current ladder 21 is at maximal projection longitudinal length L in the x-direction1Representing, the guide face 22 length L in x direction represents, the guide face 22 bottom surface intersecting lens length w in y direction with transversal slotting 2 represents, guide face 22 is β with the angle of wall 3, and angle β is the least, and the horizontal gas film cooling efficiency of wall is the best.
In the present embodiment, following current ladder 21 has two ladders, and the height h of two ladders is equal, and guide face 22 connects bottom surface and the wall 3 of fluting 2.Air film hole 1 is cylindrical, and air film hole 1 is 35 ° with the angle α of wall 3, and the lateral length e of wall 3 is 4 times of air film hole 1 aperture, and groove depth H of transversal slotting 2 is 0.5d, and groove width c is 3d, and following current ladder 21 is at maximal projection longitudinal length L in the x-direction1For 0.25d, the height of each ladder is identical, is 0.25d, and the guide face 22 bottom surface intersecting lens length w in y direction Yu transversal slotting 2 is 1d；The guide face 22 length L in x direction is equal with air film hole aperture, and guide face 22 can calculate according to the depth H of fluting and the guide face 22 length L in x direction with the angle β of wall.
Use the present embodiment structure, under conditions of air blowing ratio is 0.5, Fig. 6 a is air film hole downstream wall gas film cooling efficiency distribution (η) of existing structure, Fig. 6 b is air film hole downstream of the present utility model wall gas film cooling efficiency distribution, in figure, 0.4 and 0.3 gas film cooling efficiency representing two these regions of wall is 0.4 and 0.3, article two, dotted line is for the apparent gas film cooling efficiency distribution showing two kinds of structures, two figures contrast it appeared that, wall laterally and exhibition to, this utility model has more preferable Film Cooling.This is owing to this utility model is at the intermediate arrangement following current ladder 21 of the downstream cell wall of fluting; reduce the cooling gas momentum in wall vertical direction; cooling gas can preferably be opened up to flowing along wall; cooling gas is when flowing through following current ladder 21; improve the cooling gas cooling protection to ladder, following current ladder 21 also functions to reduce the effect of cooling gas velocity, cooling gas can covering evenly on wall; weaken the formation of reverse vortex pair, improve wall central area cooling effect.The effect of the guide face 22 of following current ladder 21 both sides is to reduce fluting cell wall part in groove is cooled down the resistance of gas, this part cooling gas flows through wall both sides along guide face 22, cooling effectiveness to wall plays the effect of superposition, improve the horizontal cooling effect of wall, Fig. 7 and Fig. 8 seen from concrete data analysis.
When air blowing ratio is 0.5, what Fig. 7 was quantitative analyzes existing structure and this utility model gas film cooling efficiency on the wall centrage of air film hole downstream, this utility model wall exhibition to gas film cooling efficiency be higher than existing structure, on the wall of air film hole, owing to the cooling gas of existing structure has bigger momentum in wall vertical direction, just can not well be covered on wall during contact wall, so there will be a peak value on the wall of air film hole, and this utility model avoids the appearance of this phenomenon, in the range of being studied, this utility model and existing structure gas film cooling efficiency on wall centrage averagely improve 9.1%.
nullFig. 8 quantitative analysis this utility model and the existing structure horizontal gas film cooling efficiency of the wall under the conditions of air blowing ratio is 0.5，Fig. 8 a is this utility model and the horizontal gas film cooling efficiency of wall of existing structure at x/d=5，As can be seen from the figure，Horizontal gas film cooling efficiency of the present utility model is apparently higher than existing structure，The wall area being especially connected with guide face 22，This utility model gas film cooling efficiency in this position is greatly improved，This is owing to guide face 22 reduces the cell wall resistance to cooling down gas in groove，Compared with existing structure，In groove, cooling gas reduces at the momentum of wall vertical direction，Along wall exhibition to speed increase，The cooling gas flowed out in groove flows closer in wall，Reduce the reverse vortex pair intensity above this region wall，Improve the horizontal cooling effectiveness of wall，At x/d=5、1 ＜ y/d ＜ 2 and-2 ＜ y/d ＜-1 place gas film cooling efficiency of the present utility model improves 49%.Fig. 8 b is this utility model and the horizontal gas film cooling efficiency of wall of existing structure at x/d=10, from figure it has also been discovered that, the this utility model gas film cooling efficiency in this position is higher than existing structure, in the wall area being connected with guide face 22, although gas film cooling efficiency does not significantly improve at x/d=5, but slightly improve；At x/d=10, the horizontal gas film cooling efficiency of this utility model structure averagely improves 12.7%.Compared with existing structure, this utility model not only improves wall and opens up to gas film cooling efficiency, is also greatly improved the horizontal Film Cooling of wall.
Embodiment 2
In the present embodiment structure, each several part composition and relative position relation are with embodiment 1, the ladder quantity of following current ladder is 2, difference is, in the present embodiment in following current ladder the size of two ladders not exclusively as, the length in the Y direction of ladder above is greater than following ladder, the following current ladder ratio in maximal projection length and air film hole aperture along wall horizontal direction (i.e. Y-direction) is 2.0, and the top view of guide face 22 is right-angled trapezium.
Embodiment 3
In the present embodiment structure, each several part composition and relative position relation are with embodiment 1, and difference is, the ladder quantity of following current ladder is 1, and are the step with inclined surface.
This utility model is not addressed part and is applicable to prior art.
Claims (9)
1. the structure improving gas film cooling efficiency, including air film hole, transversal slotting and wall, air film hole is located at the upstream region of wall, transversal slotting is opened in the exit of air film hole, it is characterized in that this structure centre position on the downstream cell wall of transversal slotting offers following current ladder, lateral symmetry at following current ladder arranges guide face, described following current ladder is perpendicular to wall in face of the plane carrying out flow path direction, the minimum point of following current ladder is concordant with the bottom surface of transversal slotting and downstream wall respectively with peak, following current ladder is to cross air film hole venthole center and to be parallel to the centrage of wall for axial symmetry layout；Described guide face is to be the slope of 15 ° of-75 ° of angles with wall, one ladder of described following current ladder is being 0.25-1.0 along the maximal projection longitudinal length of wall spanwise direction and the ratio in air film hole aperture, and following current ladder is being 1.0-4.0 along the maximal projection length of wall horizontal direction and the ratio in air film hole aperture；Guide face is 1.0-4.0 with the transverse width of bottom surface intersecting lens and the ratio in air film hole aperture of transversal slotting.
The structure of raising gas film cooling efficiency the most according to claim 1, it is characterised in that the ladder number of described following current ladder is 1-5.
The structure of raising gas film cooling efficiency the most according to claim 1, it is characterised in that the geomery of each ladder of described following current ladder is identical.
The structure of raising gas film cooling efficiency the most according to claim 1, it is characterised in that the longitudinal section of described one ladder of following current ladder be shaped as rectangle, semicircle, half elliptic or trapezoidal.
The structure of raising gas film cooling efficiency the most according to claim 1, it is characterised in that the top view shapes of described guide face is trapezoidal.
The structure of raising gas film cooling efficiency the most according to claim 1, it is characterised in that the longitudinal section of described guide face is shaped as curl right-angled trapezium or polygon right-angled trapezium.
The structure of raising gas film cooling efficiency the most according to claim 1, it is characterised in that described air film hole is cylindrical hole, bellmouth, rectangular opening, trapezoidal hole, crescent hole or dust-pan shaped hole.
The structure of raising gas film cooling efficiency the most according to claim 1, it is characterised in that the groove width of described transversal slotting and the ratio in air film hole aperture are 2-6, the groove depth of transversal slotting and the ratio in air film hole aperture are 0.2-1.
The structure of raising gas film cooling efficiency the most according to claim 1, it is characterised in that described air film hole angle with respect to the horizontal plane is 15 °-60 °, the lateral length of described wall is 3-10 with the ratio in air film hole aperture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620299735.3U CN205445689U (en) | 2016-04-12 | 2016-04-12 | Efficiency of film cooling is improved structure |
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| CN201620299735.3U CN205445689U (en) | 2016-04-12 | 2016-04-12 | Efficiency of film cooling is improved structure |
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| CN205445689U true CN205445689U (en) | 2016-08-10 |
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| CN201620299735.3U Withdrawn - After Issue CN205445689U (en) | 2016-04-12 | 2016-04-12 | Efficiency of film cooling is improved structure |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105822355A (en) * | 2016-04-12 | 2016-08-03 | 河北工业大学 | Novel air film cooling slotting structure |
| CN111146544A (en) * | 2019-12-30 | 2020-05-12 | 电子科技大学 | Efficient cooling structure for small high-power millimeter wave device |
| CN112855281A (en) * | 2021-01-29 | 2021-05-28 | 南京航空航天大学 | Step air film cooling hole based on 2.5D woven ceramic matrix composite and design method thereof |
| CN113738452A (en) * | 2021-09-28 | 2021-12-03 | 上海工程技术大学 | Internal cooling channel cooling structure for turbine blade |
-
2016
- 2016-04-12 CN CN201620299735.3U patent/CN205445689U/en not_active Withdrawn - After Issue
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105822355A (en) * | 2016-04-12 | 2016-08-03 | 河北工业大学 | Novel air film cooling slotting structure |
| CN105822355B (en) * | 2016-04-12 | 2017-08-29 | 河北工业大学 | A kind of New Gas Film cools down notching construction |
| CN111146544A (en) * | 2019-12-30 | 2020-05-12 | 电子科技大学 | Efficient cooling structure for small high-power millimeter wave device |
| CN112855281A (en) * | 2021-01-29 | 2021-05-28 | 南京航空航天大学 | Step air film cooling hole based on 2.5D woven ceramic matrix composite and design method thereof |
| CN112855281B (en) * | 2021-01-29 | 2022-06-10 | 南京航空航天大学 | Step air film cooling hole based on 2.5D woven ceramic matrix composite and design method thereof |
| CN113738452A (en) * | 2021-09-28 | 2021-12-03 | 上海工程技术大学 | Internal cooling channel cooling structure for turbine blade |
| CN113738452B (en) * | 2021-09-28 | 2023-02-10 | 上海工程技术大学 | Internal cooling channel cooling structure for turbine blade |
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Granted publication date: 20160810 Effective date of abandoning: 20170829 |