CN105240055A - Cover structure for improving cooling efficiency of horizontal gas film on downstream of open slotted hole - Google Patents
Cover structure for improving cooling efficiency of horizontal gas film on downstream of open slotted hole Download PDFInfo
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- CN105240055A CN105240055A CN201510706141.XA CN201510706141A CN105240055A CN 105240055 A CN105240055 A CN 105240055A CN 201510706141 A CN201510706141 A CN 201510706141A CN 105240055 A CN105240055 A CN 105240055A
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Abstract
The invention relates to a cover structure for improving the cooling efficiency of a horizontal gas film on the downstream of an open slotted hole. The cover structure comprises a gas film hole, a horizontal open slot, a wall, protrusions and caps. The gas film hole is formed in the upstream area of the wall. The horizontal open slot is formed in an air outlet of the gas film hole. The protrusions are arranged in the downstream area of the wall and are distributed with the central line of the wall passing through the center of the air outlet of the gas film hole as the axis of symmetry. The face, facing the air outlet of the gas film hole, of each protrusion is a protrusion air inlet, and the opposite is a protrusion air outlet. The ratio of the length of each protrusion air inlet to the aperture of the gas film hole ranges from 2.0 to 5.0, and the length of each protrusion air inlet is 1.5-5.0 times that of the corresponding protrusion air outlet. The distance from each protrusion air inlet to the center of the air outlet of the gas film hole is 10-30 times the aperture of the gas film hole. The ratio of the height of the protrusions to the aperture of the gas film hole ranges from 0.25 to 3.0. The cover structure is characterized by further comprising the caps which cover the protrusions; the two sides of each cap are fixedly connected with the top of the corresponding protrusion; and the thickness of the caps is not greater than one fifth of the aperture of the gas film hole.
Description
Technical field
The present invention relates to gas turbine inner vanes cooling technology field, be specifically related to a kind of lid formula structure improving the horizontal gas film cooling efficiency in grooved bore downstream.
Background technique
Gas turbine, as a kind of important power plant, is widely used in the multiple fields such as Aero-Space, chemical industry, vehicle, generating.The development of gas turbine indicates national scientific and technological level, military strength and a comprehensive strength.The thermal efficiency of gas turbine and output power are mainly by the impact of fuel gas temperature, and present stage is mainly from constantly the resistant to elevated temperatures material of development and employing cooling technology two aspect improve the entrance initial temperature of gas turbine.But owing to being subject to the restriction of exotic material development, effective cooling way therefore must be adopted to prevent the hot-end component of gas turbine impaired.Gaseous film control is one of effective cooling means in present stage, is widely used in gas turbine field.
Adopt and arrange protruding grooved bore cooling technology at downstream wall, be used to the protection of turbine blade in gas turbine.Transversal slotting can effectively reduce the penetrating power of cooling air to main flow, the efficiency of effective raising gaseous film control, reduce the coefficient of heat transfer of wall and combustion gas, reduce surface heat flow ratio, adopt rational structure effectively can improve the horizontal and vertical gas film cooling efficiency of air film hole downstream wall.Present stage mainly improves turbine blade gas film cooling efficiency in two: one is on the basis offering air film hole, adopt transversal slotting structure to reach the object improving cooling effect; Two is arrange certain protruding structure at air film hole downstream wall, increases the horizontal area coverage of downstream wall cooling air film and cooling effect by the projection of different structure.The Chinese patent being 200710017790.4 as the patent No. proposes a kind of grooving gaseous film cooling hole structure, and when air blowing ratio is greater than the operating mode of 1.0, Film Cooling obviously reduces, limited to the cross-protection of air film hole downstream wall.Chinese patent (patent No. is 201010106756.6) proposes a kind of structure improving cooling efficiency of gas film of discrete hole; this structure does not consider the superposition of transversal slotting gaseous film control to wall cooling; downstream projection is not only one with wall; simultaneously close to air film hole; hinder the flowing of cooling air to downstream wall; projection raises cooling air, makes the wall in protruding neighbouring certain limit be exposed in high-temperature fuel gas, reduces cooling air film to the protective action of wall.Claimant's earlier application patent (201520094208.4) proposes a kind of structure improving fluting air film hole downstream wall gas film cooling efficiency, this structure has transversal slotting and projection, but this patent still has the following disadvantages: projection set by this patent can not be collected from wall cooling air remotely fully, lifting to some extent when this part cooling air runs into projection, reduce protruding near the cooling effectiveness of wall.
Summary of the invention
For the deficiency of existing design, the present invention proposes a kind of lid formula structure improving the horizontal gas film cooling efficiency in grooved bore downstream.This structure can be collected from wall cooling air remotely fully, lifting can not be there is when making this part cooling air run into projection, avoid the reduction of the cooling effectiveness of protruding neighbouring wall, discrete holes gaseous film control can be improved to the horizontal cooling effect of downstream wall, increase cooling air film to the area coverage of downstream wall, effectively improve wall horizontal cooling effect in turbine blade air film hole downstream in gas turbine.Be applicable to the air film cooling technology of all discrete holes distribution forms with notching construction.
The technical solution adopted in the present invention is: provide a kind of lid formula structure improving the horizontal gas film cooling efficiency in grooved bore downstream, comprise air film hole, transversal slotting, wall, projection and bind, wall upstream region is provided with air film hole, transversal slotting is opened in air film hole air outlet place, the protruding downstream area at wall; Protruding with the wall center line crossing air film hole gas outlet center for axisymmetric distributes; Protruding is protruding suction port in face of air film hole air outlet, opposite direction is protruding air outlet, the molded line that projection is met to air film hole air outlet is line windward, and the molded line that facing away from air film hole air outlet is back pressure molded line, and described back pressure molded line is the molded line protruded to wall downstream direction; The ratio in the protruding length of suction port and the aperture of air film hole is 2.0-5.0, and the length of protruding suction port is 1.5-5.0 times of protruding air outlet length; Protruding suction port is 10-30 times of the aperture of air film hole to the distance of air film hole gas outlet center; The height of described projection is 0.25-3.0 with the ratio in the aperture of air film hole; It is characterized in that this structure also comprises to bind, bind and cover in projection, described in the both sides of binding be fixedly connected with the top of projection respectively, the thickness bound is not more than the aperture of the air film hole of 1/5.
Claimant proposes a kind of structure improving fluting air film hole downstream wall gas film cooling efficiency in first patented technology (patent No. is 201520094208.4).By comparison, the present invention arranges a projection bound at downstream wall on the basis of transversal slotting film cooling holes, and namely cover in existing convex upper portion and bind, both sides of binding are fixedly connected with protruding top.This structure can play the effect of collection to cross machine direction upstream and longitudinal cooling air, cooling air is prevented directly to be lifted away from because running into wall protruding structure, improve protruding upstream and neighbouring wall Film Cooling, cooling air has one and expands and collecting action after this projection, increases cooling air to the area coverage of downstream wall.Structure of the present invention can not be raised cooling air due to projection and reduce wall cooling effect, in addition, owing to being raised with suction port and air outlet and carrying out flow path direction just to cooling air, too large flow losses can not be caused to cooling air, and enhance horizontal wall gas film cooling efficiency, when air blowing ratio is greater than 1.0, cooling air still has good cooling effect to wall.Experimental result shows, the present invention is by adopting the protruding structure of lid formula, and its wall cooling efficiency entirety can be made to significantly improve, and the protruding structure cooling effectiveness of the uncovered before relative claimant on average adds 13.1%.
Structure of the present invention also has processes the features such as simple, with low cost, is applicable to the cooling protection to gas turbine blade and end wall, more can meets the needs of Practical Project.
Accompanying drawing explanation
Fig. 1 the present invention improves the overall structure schematic diagram of the lid formula structure of the horizontal gas film cooling efficiency in grooved bore downstream;
Fig. 2 the present invention improves the plan structure schematic diagram of a kind of embodiment of lid formula structure of the horizontal gas film cooling efficiency in grooved bore downstream;
Fig. 3 the present invention improves the main TV structure schematic diagram of a kind of embodiment of lid formula structure of the horizontal gas film cooling efficiency in grooved bore downstream;
Fig. 4 of the present invention protruding 4 improves the principle schematic of gas film cooling efficiency, and Fig. 4 a is plan view, and Fig. 4 b is the plan view on middle section;
When Fig. 5 air blowing ratio is 0.25, the cooling effectiveness distribution map of fluting air film hole downstream wall, wherein, Fig. 5 a is air blowing ratio is 0.25, the cooling effectiveness distribution map of the fluting air film hole downstream wall of prior art; Fig. 5 b is air blowing ratio is 0.25, the cooling effectiveness distribution map of fluting air film hole downstream of the present invention wall;
When Fig. 6 air blowing ratio is 0.25, prior art and cooling effectiveness comparison diagram of the present invention on the wall center line of fluting air film hole downstream;
When Fig. 7 air blowing ratio is 0.25, prior art and cooling effectiveness comparison diagram of the present invention on the wall x/d=14 x wire of fluting air film hole downstream;
Fig. 8 the present invention improves the plan structure schematic diagram of the lid formula structure protrusions 4 half bracket type topological resemblance structure of the horizontal gas film cooling efficiency in grooved bore downstream;
Fig. 9 the present invention improves in the lid formula structure of the horizontal gas film cooling efficiency in grooved bore downstream 5 overall schematic that are arcuate structure that bind;
In figure, 1-air film hole, 2-transversal slotting (or groove), 3-wall, 4-are protruding, 5-binds, 11-air film hole air outlet, the protruding suction port of 41-, the protruding air outlet of 42-, 43-molded line, 44-back pressure molded line windward.
Embodiment:
Below in conjunction with embodiment and accompanying drawing, structure of the present invention is described further, but does not limit the protection domain to the claims in the present invention with this.
The lid formula structure that the present invention improves the horizontal gas film cooling efficiency in grooved bore downstream (is called for short structure, see Fig. 1-9) comprise air film hole 1, transversal slotting 2, wall 3 and protruding 4, wall 3 upstream region is provided with air film hole 1, transversal slotting 2 is opened in air film hole air outlet 11 place, and projection 4 is at the downstream area of wall 3; Protruding 4 with the wall center line crossing center, air film hole air outlet 11 for axisymmetric distributes; Protruding 4 is protruding suction port 41 in face of air film hole air outlet 11, opposite direction is protruding air outlet 42, protruding 4 molded line of meeting to air film hole air outlet 11 are molded line 43 windward, the molded line that facing away from air film hole air outlet 11 is back pressure molded line 44, and described back pressure molded line is the molded line protruded to wall downstream direction; The ratio of the protruding length w of the suction port 41 and aperture d of air film hole 1 is 2.0-5.0, and the length of protruding suction port 41 is 1.5-5.0 times of protruding air outlet 42 length; Protruding suction port 41 is 10-30 times of the aperture d of air film hole 1 to the distance L at center, air film hole air outlet 11; The described height H of protruding 4 is 0.25-3.0 with the ratio of the aperture d of air film hole 1; It is characterized in that this structure also comprises and bind 5, binding 5 covers on protruding 4, described in the both sides of binding be fixedly connected with the top of protruding 4 respectively, described in bind 5 thickness be not more than the aperture of the air film hole 1 of 1/5.
Of the present invention be further characterized in that described in bind 5 peak to the distance of wall 3 be the 1-2 of the height of protruding 4 doubly.
Of the present invention be further characterized in that described in bind 5 for plane shape or curvecd surface type.
Of the present inventionly be further characterized in that described protruding 4 is half bracket type, prism-type or topological resemblance structure.
Of the present invention be further characterized in that described in windward molded line 43 be straight line or the camber line to wall downstream direction projection.
Of the present invention be further characterized in that described in the spacing b of molded line and back pressure molded line be windward adjustable.
Of the present inventionly be further characterized in that the groove width c of described transversal slotting 2 is 2.0-6.0 with the ratio of the aperture d of air film hole 1, the groove depth s of transversal slotting 2 is 0.2-1.0 with the ratio of the aperture d of air film hole 1.
Of the present inventionly be further characterized in that described air film hole 1 is cylindrical hole, cone shape hole, rectangular opening, trapezoidal hole, crescent hole, dust-pan shaped hole or Console hole.
Of the present inventionly be further characterized in that described air film hole 1 angle β is with respect to the horizontal plane 15 °-60 °, the ratio e/d of the lateral length e of described wall 3 and the aperture d of air film hole 1 is 3.0-10.
Arranging in protruding 4 upper ends 5 basic principles (see Fig. 4) that can improve grooved bore downstream wall gas film cooling efficiency that bind in the present invention is: cooling air out enters main flow region z (this main flow region refers to high-temperature gas region) through transversal slotting 2 from air film hole air outlet 11, in transverse direction and the z direction of wall, cooling air is through protruding 4 time, part cooling air a by convex barrier (see Fig. 4 a), it the direction of vertical walls is y direction, from air film hole air outlet cooling air out through bind 5 time, have part cooling air c and compress into protruding 4, now, the 5 pairs of cooling air that bind serve longitudinal balling-up effect, combine the lateral collection that protruding 4 complete cooling air again, under the double action of 5 and protruding 4 that binds, cooling air is gathered in a large number in protruding 4 with the space of 5 formations that bind, thus obviously promote the transverse direction of upstream wall and longitudinal cooling effectiveness, bind 5 efficiency is set when preventing cooling air because running into protruding obstruction, there will be the phenomenon that cooling air is elevated.Simultaneously, to bind 5 arrange the cooling air of collection can be made all to flow out from protruding air outlet 42, sudden expansion is there is in cooling air after protruding 4, larger vorticity can be produced, part cooling air g is along the flowing of wall center line, and part cooling air m spreads to both sides, because cooling air is gathered in a large number in protruding 4 with the space of 5 formations that bind, increase the area coverage of cooling air on wall, finally make the cooling effectiveness of wall entirety significantly improve.
In the present invention, air film hole 1 removes cylindrical hole and also can be rectangular opening, cone shape hole, trapezoidal hole, crescent hole, dust-pan shaped hole or Console hole etc., air film hole 1 is at the horizontal arranged in rows of wall, the ratio e/d of the lateral length e of wall 3 and groove 2 and the aperture d of air film hole 1 is between 3.0-10, and air film hole 1 is 15 °-60 ° with the angle β of wall; Structure of the present invention can be used for the surface of any favorable pressure gradient, and comprise the curved surfaces such as various concave surface, convex surface, when air blowing ratio is between 0.25-1.5, gas film cooling efficiency is remarkable.
The present invention arranges protruding 4 at grooved bore downstream wall, be conducive to improving wall cooling efficiency, protruding 4 pairs of cooling air play the effect of gathering, horizontal wall cooling effectiveness between effective raising air film hole and projection, produce sudden expansion phenomenon when cooling air flows out from protruding air outlet 42 after protruding 4, increase the horizontal film-cooled heat of protruding rear surface.The feature of this structure is 5 shapes settings of binding, bind 5 height and thickness, then (radian of molded line 43 and back pressure molded line 44, air film hole outlet 11 are to distance L, the protruding suction port length w of protruding suction port 41 and the length of protruding air outlet 42, the height of protruding 4 and two parantheses Elongation (w windward in conjunction with concrete projection 4 shape and relevant parameter
1/ w
2)), very important effect is had to the flowing of cooling air and the cooling effect of cooling air to the horizontal and vertical wall of wall, the requirement to wall cooling efficiency to be reached according to the difference of main flow reynolds number Re and Secondary Flow flow velocity and cooling air, the height H of protruding 4 and the aperture d of air film hole 1 than H/d within the scope of 0.25-3.0.The increase of air blowing ratio, the increase that H/d should be suitable, on the contrary air blowing ratio reduces, and H/d also should reduce thereupon.Height H to protruding 4 and the thickness h that binds are designed with following principle: the first, bind be exposed in high-temperature fuel gas completely for avoiding projection, height of projection H should not exceed air film hole 1 spray that cooling air affects work as ground level; The second, if the spacing that air film hole is laterally in a row arranged is very little, only need improve wall center region cooling effectiveness, height of projection H can exceed cooling air locality impact height; 3rd, when the thickness that binds is excessive, obstruction is produced to gas flow and makes fluid produce longitudinal Vortex, increase the blending of main flow and cooling air; 4th, the thickness h that binds should be little as much as possible, and the protruding effect of binding is the blending reducing main flow and cool stream, prevents the cooling air entering projection from meeting with obstruction and be elevated and make downstream wall can not get corresponding cooling effect.
Bind in the present invention 5 thickness h the smaller the better, consider processing technology and cost requirement, generally arrange that the ratio h/d of the aperture d of thickness h and the air film hole 1 bound is maximum does not exceed 0.2, effectively can stop that cooling air runs into projection and the phenomenon up walked.
Embodiment 1
The lid formula structure (see Fig. 1-3) that the present embodiment improves the horizontal gas film cooling efficiency in grooved bore downstream comprises air film hole 1, transversal slotting 2, wall 3, protruding 4 and bind 5, wall 3 upstream region is provided with air film hole 1, transversal slotting 2 is opened in air film hole air outlet 11 place, projection 4 is at the downstream area of wall 3, projection is two parantheses, two parantheses are for axle is arranged symmetrically with perpendicular to wall 3 with mistake air film hole center line, in face of air film hole direction is protruding suction port 41, it is protruding air outlet 42 back to air film hole direction, protruding 4 molded line of meeting to air film hole direction are molded line 43 windward, molded line back to air film hole direction is the back pressure molded line 44 of protruding 4, molded line 43 and back pressure molded line 44 are pair of parallel circular arc lines windward, bind and 5 to cover on protruding 4, the both sides of binding are connection corresponding to the top of two parantheses respectively.Described bind 5 thickness be the aperture of the air film hole 1 of 1/5.
In Fig. 2 and Fig. 3, coordinate x, y, z represents the flow direction of fluid, and what x positive axis was pointed to is the main flow direction of fluid, y-axis vertical walls, the i.e. short transverse of protruding 4, the transverse direction of the wall that z direction refers to, the aperture of air film hole 1 represents with d, air film hole 1 and wall 3 angle are β, air film hole 11 is L with the spacing of protruding suction port 41, and the horizontal width of wall 3 represents with e, and molded line 43 and back pressure molded line 44 spacing are b windward, the i.e. thickness of parantheses, the less wall cooling effect of its thickness is better.The groove depth of transversal slotting 2 and groove width represent with s and c respectively, and the height of protruding 4 represents with H, bind 5 thickness be h, the length w of protruding suction port 41 in z direction
2represent, the length of projection 4 in x direction is w
1, w
1/ w
2ratio less time, wall center region cooling effect can be strengthened.Structure is have two parantheses connected that bind.
In the present embodiment, air film hole 2 is cylindrical hole, air film hole 1 and wall angle β are 30 °, the ratio of wall 3 lateral length e and air film hole aperture d is 8, the length of protruding suction port 41 is 4 with air film hole aperture ratio, the length of protruding suction port 41 is 2 times of protruding air outlet 42 length, and the center of air film hole air outlet 11 is 15 times of air film hole aperture d to the distance L of protruding suction port 41, and projection is at x direction length w
1with at z direction length w
2ratio be 1.5, height H and the air film hole aperture d ratio of protruding 4 are 1, and the thickness h bound and air film hole aperture d ratio are 0.2.The ratio of the groove width e of transversal slotting 2 and groove depth s and air film hole aperture d is respectively 3 and 0.5.Bind 5 for plane shape, bind equal with the height of protruding 4 to the distance of wall 3.
Adopt the present embodiment structure, be under the operating mode of 0.25 at air blowing ratio, Fig. 5 a is grooved bore downstream wall gas film cooling efficiency distribution (η) of prior art, Fig. 5 b is for establishing the wall gas film cooling efficiency distribution of the present embodiment structure grooved bore downstream, can be found by the contrast of above two figure, on the present embodiment structure wall cooling effectiveness be 0.4 region be obviously greater than prior art, near projection, the transverse direction cooling area coverage of wall is also greater than prior art, near the present embodiment structure projection, there is the cooled region of similar double-edged sword shape, its horizontal cooling effectiveness is obviously better than prior art, concrete data analysis contrast as shown in Figure 7.The structure of protruding 4 is two symmetrical parantheses, there are protruding suction port 41 and protruding air outlet 42, less to the resistance of cooling air, again because two parantheses are by 5 connections of binding, prevent from wall remotely cooling air be elevated because running into arc convex, be conducive to cooling air to wall downstream flow, cooling air is gathered after entering projection in protruding 4 with the space of 5 formations that bind, and flow out from protruding air outlet 42, reach the effect cooling protruding rear surface.
Adopt the present embodiment structure, Fig. 6 is under air blowing ratio is 0.25 operating mode, on wall center line, the present embodiment structure and prior art are in the contrast of gas film cooling efficiency in the x-direction, can be found by contrast, gas film cooling efficiency near air film hole position on wall center line is substantially identical, at x/d=5 to close to high spot, the wall cooling efficiency of the present embodiment structure has obvious lifting, the maximum raising 5.7% of cooling effectiveness on institute's research range internal face center line, this is that cooling air is all gathered in is protruding with in the space that forms of binding owing to binding 5, the energy of cooling air is put aside, thus increase the cooling effectiveness of protruding neighbouring wall center region.
Fig. 7 is the contrast at the horizontal cooling effectiveness of x/d=14 place wall of the present embodiment structure and prior art, and can find out, the present embodiment structure wall cooling efficiency is herein generally higher than prior art, and cooling effectiveness on average increases by 13.1%.Illustrate that the present embodiment structure effectively improves the wall cooling efficiency near projection, the present embodiment structure not only plays the effect of collection to cooling air, increase wall center cooling effectiveness, also make part cooling air spread to both sides simultaneously, horizontal cooling effect is also significantly improved, to sum up relatively can find, the present embodiment structure has better cooling effect relative to prior art to whole wall.
Embodiment 2
The present embodiment improves the position of each several part in the lid formula structure of the horizontal gas film cooling efficiency in grooved bore downstream and annexation with embodiment 1, difference is that described protruding 4 is two prism-type circular arcs (see Fig. 8), describedly bind for rough curvecd surface type, the both sides of binding are fixedly connected with the top of two prism-type circular arcs respectively, described in bind 5 thickness be the aperture of the air film hole 1 of 1/10.
Embodiment 3
The present embodiment improves the position of each several part in the lid formula structure of the horizontal gas film cooling efficiency in grooved bore downstream and annexation with embodiment 1, protruding 4 is two parantheses, bind for smooth arc-shaped curved surface (see Fig. 9) described in difference is, the both sides of binding are fixedly connected with the top of two parantheses respectively, described bind 5 thickness be the aperture of the air film hole 1 of 0.05, described in bind 5 peak be 2 times of the height of protruding 4 to the distance of wall 3.
The present invention does not address part and is applicable to prior art, particularly the earlier application patented technology of claimant.
Claims (9)
1. one kind is improved the lid formula structure of the horizontal gas film cooling efficiency in grooved bore downstream, comprise air film hole, transversal slotting, wall, projection and bind, wall upstream region is provided with air film hole, and transversal slotting is opened in air film hole air outlet place, the protruding downstream area at wall; Protruding with the wall center line crossing air film hole gas outlet center for axisymmetric distributes; Protruding is protruding suction port in face of air film hole air outlet, opposite direction is protruding air outlet, the molded line that projection is met to air film hole air outlet is molded line windward, and the molded line that facing away from air film hole air outlet is back pressure molded line, and described back pressure molded line is the molded line protruded to wall downstream direction; The ratio in the protruding length of suction port and the aperture of air film hole is 2.0-5.0, and the length of protruding suction port is 1.5-5.0 times of protruding air outlet length; Protruding suction port is 10-30 times of the aperture of air film hole to the distance of air film hole gas outlet center; The height of described projection is 0.25-3.0 with the ratio in the aperture of air film hole; It is characterized in that this structure also comprises to bind, bind and cover in projection, described in the both sides of binding be fixedly connected with the top of projection respectively, the thickness bound is not more than the aperture of the air film hole of 1/5.
2. the lid formula structure of the horizontal gas film cooling efficiency in raising grooved bore downstream according to claim 1, the peak bound described in it is characterized in that is 1-2 times of protruding height to the distance of wall.
3. the lid formula structure of the horizontal gas film cooling efficiency in raising grooved bore downstream according to claim 1, binds described in it is characterized in that for plane shape or curvecd surface type.
4. the lid formula structure of the horizontal gas film cooling efficiency in raising grooved bore downstream according to claim 1, is characterized in that described projection is half bracket type, prism-type or topological resemblance structure.
5. the lid formula structure of the horizontal gas film cooling efficiency in raising grooved bore downstream according to claim 1, described in it is characterized in that, molded line is straight line or the camber line to wall downstream direction projection windward.
6. the lid formula structure of the horizontal gas film cooling efficiency in raising grooved bore downstream according to claim 1, described in it is characterized in that, the spacing of molded line and back pressure molded line is adjustable windward.
7. the lid formula structure of the horizontal gas film cooling efficiency in raising grooved bore downstream according to claim 1, it is characterized in that the groove width of described transversal slotting is 2.0-6.0 with the ratio in the aperture of air film hole, the groove depth of transversal slotting is 0.2-1.0 with the ratio in the aperture of air film hole.
8. the lid formula structure of the horizontal gas film cooling efficiency in raising grooved bore downstream according to claim 1, is characterized in that described air film hole is cylindrical hole, cone shape hole, rectangular opening, trapezoidal hole, crescent hole, dust-pan shaped hole or Console hole.
9. the lid formula structure of the horizontal gas film cooling efficiency in raising grooved bore downstream according to claim 1, it is characterized in that described air film hole angle is with respect to the horizontal plane 15 °-60 °, the ratio in the lateral length of described wall and the aperture of air film hole is 3.0-10.
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| CN201510706141.XA CN105240055B (en) | 2015-10-27 | 2015-10-27 | A kind of lid formula structure for improving the horizontal gas film cooling efficiency in grooved bore downstream |
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| CN201510706141.XA CN105240055B (en) | 2015-10-27 | 2015-10-27 | A kind of lid formula structure for improving the horizontal gas film cooling efficiency in grooved bore downstream |
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| CN105240055B CN105240055B (en) | 2017-03-29 |
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Cited By (1)
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| CN107559050A (en) * | 2017-08-30 | 2018-01-09 | 河北工业大学 | A kind of water conservancy diversion cover structure for strengthening wall cooling effect |
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| US20050123401A1 (en) * | 2003-06-30 | 2005-06-09 | General Electric Company | Component and turbine assembly with film cooling |
| CN101042056A (en) * | 2007-04-30 | 2007-09-26 | 西安交通大学 | Grooving gaseous film cooling hole |
| CN104594956A (en) * | 2015-02-10 | 2015-05-06 | 河北工业大学 | Structure for improving air film cooling efficiency of downstream wall surface of slotted air film hole |
| CN205047253U (en) * | 2015-10-27 | 2016-02-24 | 河北工业大学 | Efficiency of fluting hole low reaches film cooling is improved lid formula structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050123401A1 (en) * | 2003-06-30 | 2005-06-09 | General Electric Company | Component and turbine assembly with film cooling |
| CN101042056A (en) * | 2007-04-30 | 2007-09-26 | 西安交通大学 | Grooving gaseous film cooling hole |
| CN104594956A (en) * | 2015-02-10 | 2015-05-06 | 河北工业大学 | Structure for improving air film cooling efficiency of downstream wall surface of slotted air film hole |
| CN205047253U (en) * | 2015-10-27 | 2016-02-24 | 河北工业大学 | Efficiency of fluting hole low reaches film cooling is improved lid formula structure |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107559050A (en) * | 2017-08-30 | 2018-01-09 | 河北工业大学 | A kind of water conservancy diversion cover structure for strengthening wall cooling effect |
| CN107559050B (en) * | 2017-08-30 | 2023-05-05 | 河北工业大学 | Flow guide sleeve structure for enhancing wall cooling effect |
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| CN105240055B (en) | 2017-03-29 |
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