CN113819492B - Guide plate, flame tube and gas turbine engine - Google Patents
Guide plate, flame tube and gas turbine engine Download PDFInfo
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- CN113819492B CN113819492B CN202111128730.6A CN202111128730A CN113819492B CN 113819492 B CN113819492 B CN 113819492B CN 202111128730 A CN202111128730 A CN 202111128730A CN 113819492 B CN113819492 B CN 113819492B
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- flame tube
- mounting
- swirler
- ring
- guide plate
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
- F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
- F23R3/42—Continuous combustion chambers using liquid or gaseous fuel characterised by the arrangement or form of the flame tubes or combustion chambers
- F23R3/58—Cyclone or vortex type combustion chambers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
- F23R2900/00—Special features of, or arrangements for continuous combustion chambers; Combustion processes therefor
- F23R2900/03042—Film cooled combustion chamber walls or domes
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Gas Burners (AREA)
Abstract
The invention discloses a guide plate, a flame tube and a gas turbine engine, wherein the guide plate comprises: the vortex device comprises a vortex device mounting ring, a limiting boss, a mounting boss, a divergence hole and a substrate; the base plate is of a double-flanging annular structure; the base plate comprises an annular plate and a curled edge; the plurality of swirler mounting rings are uniformly arranged on the annular plate in the circumferential direction; the plurality of limiting bosses are arranged at the upper end and the lower end of the cooling side of the substrate; the mounting bosses are arranged on the cooling side of the substrate; a plurality of diverging holes are provided in the annular plate. The invention adopts the integral guide plate, thereby avoiding the problems of high processing precision and large assembly difficulty caused by the overlarge gap of the split guide plate, which damages the flow field of the main combustion area at the head part of the flame tube or caused by the undersize gap of the split guide plate; the heat protection effect of the head of the flame tube is enhanced by adopting an impact and diffusion cooling mode; the guide plate is fixed to the head through the screw rod, so that the guide plate is convenient to disassemble and assemble; the cooling side of the guide plate is provided with a limit boss, so that the gap between the guide plate and the head is ensured.
Description
Technical Field
The invention belongs to the technical field of aero-engines, and particularly relates to a guide plate, a flame tube and a gas turbine engine.
Background
The flame tube is a key part in a combustion chamber of a gas turbine engine, the temperature of the combustion chamber rises increasingly along with the performance improvement of the advanced gas turbine engine, the air quantity participating in combustion is increased due to the high oil-gas ratio, and the air quantity used for cooling is reduced, so that the wall temperature of the flame tube is increased, fuel oil is combusted in the flame tube, the average temperature of the fuel gas in a main combustion area close to the head of the flame tube is up to 2000-2500K, the highest working temperature of the currently and commonly adopted high-temperature alloy is only about 1300K, and the problem of head ablation of the flame tube is one of main problems in the development process of the combustion chamber, so that how to efficiently cool the head of the flame tube is one of important technical problems to be solved in the design of the combustion chamber.
The existing flame tube generally adopts a guide plate with a profile in a rotary form to carry out thermal protection on the head of the flame tube, the guide plate is directly welded on the head of the flame tube, each swirler mounting hole corresponds to one guide plate, an impact cooling mode is adopted, a gas surface is not covered by a gas film, and gas can be directly contacted with the guide plate. The guide plate is used in a combustion chamber with a high oil-gas ratio in a main combustion area, and the structure is easy to cause local overhigh temperature, ablation, deformation and carbon deposition. And the cracking of the guide plate can lead the head of the flame tube to be exposed in the fuel gas of the main combustion area, thereby ablating the head of the flame tube.
The guide plate of current flame tube head installation generally adopts pure impingement cooling, and cooling efficiency is lower to the guide plate gas face lacks the cooling gas protection, makes its direct and high temperature gas contact, leads to the guide plate to appear warping easily, burns scheduling problem. Meanwhile, a plurality of guide plates are welded at the head of the flame tube, the processing technology is complex, the performance of the combustion chamber is influenced by the gap between the adjacent guide plates, if a large gap exists between the adjacent guide plates, cold air at the head of the flame tube enters the flame tube through the gap between the guide plates to participate in combustion, so that the waste of the cooling air is caused, and meanwhile, the air flow enters the flame tube vertical to the wall surface of the head of the flame tube and influences the flow field of a backflow area at the head of the flame tube; if the clearance between the adjacent guide plate is little, will improve the processing requirement of flame tube head and guide plate greatly, otherwise will bring the problem of interference between the guide plate. Therefore, more effective guide plates and flame tubes are needed to meet the design requirements of advanced high-temperature-rise combustors.
Disclosure of Invention
In order to solve the above problems, the present invention discloses a baffle, comprising: the vortex device comprises a vortex device mounting ring, a limiting boss, a mounting boss, a divergence hole and a substrate;
the base plate is of a double-flanging annular structure; the base plate comprises an annular plate and a curled edge;
the plurality of swirler mounting rings are uniformly arranged on the annular plate in the circumferential direction;
the limiting bosses are arranged at the upper end and the lower end of the cooling side of the substrate;
the mounting bosses are arranged on the cooling side of the substrate;
the plurality of diverging holes are formed in the annular plate and located on the periphery of the swirler mounting ring.
Furthermore, the height of the mounting boss is L;
the mounting boss is used for axial positioning;
wherein the value range of L is 2-4 times of the diameter of the impact hole.
Further, the height of the limiting boss is lower than that of the mounting boss.
Furthermore, the divergent holes are in a multi-circle concentric circular array, and the tangential angle of the divergent holes ranges from 45 degrees to 90 degrees; the angle of inclination of the diverging holes is less than 30 degrees; the aperture range of the divergent hole is phi 0.5 mm-phi 0.8mm; the diverging holes are used to form a fully covered cooling air film.
Still further, cooling holes are included;
the cooling holes are uniformly formed in the swirler mounting ring.
Still further, the device also comprises a screw;
the plurality of screws are arranged at the central position between the swirler mounting rings at the cooling side of the substrate;
and a plurality of mounting bosses are arranged around the bottom of the screw rod.
A flame tube, adopt the flame tube that foretell guide plate is constituteed, include: the flame tube comprises a flame tube outer ring, a flame tube inner ring, a guide plate and a swirler;
the outer flame tube ring is connected with the inner flame tube ring;
the guide plate is arranged on the inner side of the inner ring of the flame tube; the guide plate is of an integral double-flanging annular structure;
the swirler is arranged between the inner ring of the flame tube and the guide plate.
Furthermore, the outer ring of the flame tube comprises an outer ring tube body, a large bent tube and an outer ring mounting edge; the outer ring of the flame tube is of an integrated structure; the outer ring mounting edge is perpendicular to the outer wall surface of the outer ring cylinder; a plurality of outer ring bolt holes are uniformly formed in the circumferential direction of the outer ring mounting edge;
the inner ring of the flame tube comprises a head part, an inner ring tube body, a small bent tube and an inner ring mounting edge; the inner ring of the flame tube is of an integrated structure; the inner ring mounting edge is perpendicular to the outer wall surface of the inner ring cylinder; a plurality of inner ring bolt holes are uniformly formed in the circumferential direction of the inner ring mounting edge;
the outer ring mounting edge is connected with the inner ring mounting edge through bolts or screws.
Still further, the head includes a swirler mount, an impingement hole, and a through hole;
the plurality of swirler mounting seats are circumferentially and uniformly arranged in the head straight area;
the plurality of the impact holes are arranged in the straight area of the head, are positioned around the swirler mounting seat and are in a multi-circle concentric circle array;
the plurality of through holes are arranged in the center position between the swirler mounting seats of the head.
Further, the baffle is disposed on the gas side of the head by bolts.
Still further, the baffle includes a base plate including an annular plate and a curl; the distance between the annular plate and the inner ring of the flame tube is L; the turned edge and the inner ring of the flame tube form an annular slot, the width of the slot is H, and the slot is used for guiding cooling airflow to flow and providing a stable and efficient initial cooling air film for the outer ring of the flame tube and the inner ring of the flame tube;
wherein L is the height of the mounting boss, and the value range of L is 2-4 times of the diameter of the impact hole; the value range of H is 1.5-2.0 mm.
Furthermore, the swirler is movably arranged between the swirler mounting ring and the swirler mounting seat; the outer diameter of the swirler is smaller than the inner diameters of the swirler mounting ring and the swirler mounting seat.
A gas turbine engine comprises the flame tube.
Compared with the prior art, the invention has the beneficial effects that:
1) Compared with the traditional impingement cooling, a more advanced impingement and diffusion cooling mode is adopted, a full-coverage air film is formed at the head of the flame tube, and the heat protection effect of the head of the flame tube is enhanced;
2) The integrated guide plates are adopted, so that the problems that cooling air flow enters the main combustion area in the flame tube perpendicular to the head of the flame tube due to overlarge gaps between the split guide plates, the cooling air is wasted and the flow field of the main combustion area at the head of the flame tube is damaged are solved, and the problems of high processing precision, high assembly difficulty and the like caused by the overlarge gaps between the split guide plates can be solved;
3) The guide plate is designed with a structure of a plurality of screws, and is connected with the head part through the nuts, so that the processing procedures of the assembly are reduced, the processing difficulty is reduced, and the processing deformation of the assembly is reduced; meanwhile, the design is convenient to disassemble and assemble, and design or testing personnel can conveniently and directly replace the swirler to debug the performance of the flame tube;
4) Because the wall temperature of guide plate and head has the difference under the hot state, lead to its inflation volume to have the difference, for the seam groove between guide plate and the head provides stable effectual originated cooling air film for flame tube outer loop and flame tube inner ring under guaranteeing this state, set up a plurality of spacing bosss in the guide plate cooling side, avoid setting up the air film groove at flame tube outer loop and flame tube inner ring initial position, simplify the flame tube structure.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 illustrates a partial structural schematic of a combustor basket according to an embodiment of the present invention;
FIG. 2 shows a view in the direction K of FIG. 1;
FIG. 3 showsbase:Sub>A cross-sectional view taken along line A-A of FIG. 2;
fig. 4 shows a partial structural schematic of a baffle according to an embodiment of the invention;
fig. 5 shows a cross-sectional view taken along line B-B in fig. 4.
Reference numerals: 1. an outer ring of the flame tube; 11. an outer ring cylinder; 12. a large bent pipe; 13. an outer ring mounting edge; 14. outer ring bolt holes; 2. an inner ring of the flame tube; 21. a head; 22. an inner ring cylinder; 23. a small bent pipe; 24. an inner ring mounting edge; 25. a swirler mount; 26. an inner ring bolt hole; 27. an impingement hole; 28. a through hole; 3. a baffle; 31. a swirler mounting ring; 32. a limiting boss; 33. a cooling hole; 34. a screw; 35. mounting a boss; 36. a diverging aperture; 37. a substrate; 371. an annular plate; 372. curling; 4. a swirler; 5. and a nut.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
Fig. 1 shows a partial structural schematic view of a combustor basket according to an embodiment of the present invention, and fig. 2 shows a view along direction K in fig. 1. As shown in fig. 1 and 2, the present invention provides a flame tube, including: the flame tube comprises a flame tube outer ring 1, a flame tube inner ring 2, a guide plate 3 and a swirler 4;
the flame tube outer ring 1 is connected with the flame tube inner ring 2;
the guide plate 3 is arranged on the inner side of the inner ring 2 of the flame tube; the guide plate 3 is of an integral double-flanging annular structure;
the swirler 4 is arranged between the inner ring 2 of the flame tube and the guide plate 3.
Wherein, the outer ring 1 of the flame tube comprises an outer ring cylinder body 11, a large elbow 12 and an outer ring mounting edge 13, and the outer ring 1 of the flame tube is of an integrated structure and is convenient to manufacture, mount and dismount. The outer ring mounting edge 13 is annular and perpendicular to the outer wall surface of the outer ring cylinder 11, and a plurality of outer ring bolt holes 14 are uniformly arranged on the outer ring mounting edge 13 in the circumferential direction.
The inner ring 2 of the flame tube comprises a head 21, an inner ring cylinder 22, a small elbow 23 and an inner ring mounting edge 24, and the inner ring 2 of the flame tube is of an integrated structure and is convenient to manufacture, mount and dismount. The inner ring mounting edge 24 is annular and perpendicular to the outer wall surface of the inner ring cylinder 22, a plurality of inner ring bolt holes 26 are uniformly arranged on the inner ring mounting edge 24 in the circumferential direction, and the inner ring bolt holes 26 correspond to the outer ring bolt holes 14 one by one.
The head 21 includes a swirler mount 25, impingement holes 27, and through holes 28. The plurality of swirler mounting seats 25 are circumferentially and uniformly arranged in a straight area of the head 21, and the plurality of impact holes 27 are arranged in the straight area of the head 21, are positioned around the swirler mounting seats 25, and are in a multi-circle concentric circle array. A plurality of through holes 28 are provided in a central position between the swirler mounts 25 of the head 21, and preferably, the number of through holes 28 is 4 times that of the swirler mounts 25.
The outer ring mounting edge 13 is attached to the inner ring mounting edge 24, the outer ring bolt holes 14 and the inner ring bolt holes 26 are aligned one by one, and the outer flame tube ring 1 and the inner flame tube ring 2 are connected through bolts or screws. Or a flared self-locking nut can be arranged at the lower side of the outer ring bolt hole 14 and is connected and fixed through a screw. In other design modes, the outer ring 1 of the flame tube and the inner ring 2 of the flame tube can be connected through the quick-release clamp, so that the operations of design, disassembly, maintenance and the like are facilitated.
The flame tube head refers to the front end part of the flame tube, namely the flame tube is provided with other structures except the outer ring 1, the inner ring tube body 22, the small bent tube 23 and the inner ring mounting edge 24 of the flame tube.
The baffle 3 is of a monolithic structure, and on the cooling side of the baffle 3, between every two swirler mounting rings 31, there are provided screws 34, preferably 4 screws 34, which are fixed to the head 21 by being connected to the nuts 5. The screw 34 facilitates the removal and replacement of the swirler 4. The design can reduce the assembly processing procedures, reduce the processing difficulty and reduce the deformation of assembly processing; meanwhile, the design is convenient to disassemble and assemble, and design or testing personnel can conveniently and directly replace the swirler 4 to debug the performance of the flame tube.
Fig. 3 showsbase:Sub>A cross-sectional view along the linebase:Sub>A-base:Sub>A in fig. 2. As shown in fig. 3, the baffle 3 is mounted on the gas side of the head 21 of the inner ring 2 of the flame tube and fixed to the inner ring 2 of the flame tube by means of bolts. The guide plate 3 is of an integral double-flanging annular structure, and only one guide plate 3 needs to be installed on one flame tube. During installation, all the screws 34 on the guide plate 3 penetrate through the corresponding through holes 28 on the inner ring 2 of the flame tube, the screws 34 are provided with installation bosses 35, the axial positioning effect is achieved, so that the distance L between the central straight area of the guide plate 3 and the inner ring 2 of the flame tube is ensured, the installation bosses 35 are tightly attached to the gas side wall surface of the head 21, the nut 5 is connected with the screws 34, and the guide plate 3 is fixed. Adopt integral guide plate 3, avoid between the split type guide plate too big gap make the perpendicular flame tube head of cooling air flow get into the interior main combustion zone of flame tube, lead to the problem that the waste of cooling gas destroys the main combustion zone flow field of flame tube head simultaneously, but also can avoid the machining precision that brings when the gap undersize between the split type guide plate high, the big scheduling problem of the assembly degree of difficulty.
The baffle 3 includes a base plate 37, the base plate 37 including an annular plate 371 and a bead 372. In the cold state, the annular plate 371 of the deflector 3 is spaced from the inner ring 2 of the liner by a distance L. The turned edge 372 of the guide plate 3 and the inner ring 2 of the flame tube form an annular slot, the width of the slot is H, and the value range is 1.5-2.0 mm. The slot is used for guiding the cooling air current to flow, forms adherent gas film between the gap that guide plate 3 and head 21 formed, provides stable efficient originated cooling gas film for flame tube outer loop 1 and flame tube inner ring 2, realizes cooling the 2 initiating terminals of flame tube outer loop 1 and flame tube inner ring. L is the height of the mounting boss 35, and the value range of L is 2-4 times of the diameter of the impact hole 27. The starting end refers to the end close to the deflector 3.
As shown in fig. 2, the swirler 4 is movably arranged between the swirler mounting ring 31 and the swirler mounting seat 25, welding is not required, the design and the disassembly are convenient, and the swirler 4 can be conveniently and directly replaced by design or experimenters, so that the performance of the flame tube can be debugged. The outer diameter of the swirler 4 is smaller than the inner diameters of the swirler mounting ring 31 and the swirler mounting seat 25, and a certain gap is required to be reserved between a conical surface formed by the swirler mounting ring 31 and the swirler mounting seat 25 and the swirler 4 in the radial direction, so that the swirler 4 can move freely after being mounted, and a fuel nozzle can be mounted conveniently. As shown in fig. 1, the swirler 4 includes a vane and two gas flow passages. An annular slot is formed between the conical opening at the end part of the swirler 4 and the guide plate 3, and the section of the annular slot is V-shaped.
Fig. 4 shows a partial structural schematic view of a baffle according to an embodiment of the invention, and fig. 5 shows a cross-sectional view along the line B-B in fig. 4. As shown in fig. 3, 4, and 5, the baffle of the present invention includes: the base plate 37, the swirler mounting ring 31, the limiting boss 32, the cooling hole 33, the screw 34, the mounting boss 35 and the diverging hole 36;
the base plate 37 is of a double-flanging annular structure; the base plate 37 includes an annular plate 371 and a bead 372; the substrate 37 is of an integrated structure;
the plurality of swirler mounting rings 31 are circumferentially and uniformly arranged on the annular plate 371; the swirler mounting ring 31 is annular;
the plurality of limit bosses 32 are provided at the upper and lower ends of the cooling side of the base plate 37;
the cooling holes 33 are uniformly arranged on the swirler mounting ring 31; the included angle between the central axis of the cooling hole 33 and the horizontal plane is less than 90 degrees;
a plurality of the screws 34 are provided at a central position between the swirler mounting rings 31 on the cooling side of the base plate 37; mounting bosses 35 are arranged on the periphery of the bottoms of the plurality of screw rods 34;
the plurality of mounting bosses 35 are provided on the cooling side of the base plate 37;
a plurality of the diverging holes 36 are provided in the annular plate 371 around the swirler mounting ring 31.
The mounting boss 35 is a cylinder and is L in height, the mounting boss 35 is tightly attached to the gas side of the head 21 and used for axial positioning, and the value range of L is 2-4 times of the diameter of the impact hole 27, so that optimal impact and divergence cooling efficiency is realized. In another design, the mounting boss 35 may be designed in other shapes such as a rectangular parallelepiped, a cube, or a circular truncated cone.
The height of the limit boss 32 is lower than that of the installation boss 35. The limiting boss 32 can be designed into various shapes such as a cylinder, a cuboid, a cube and a strip. The two ends of the guide plate 3 are provided with a plurality of limiting bosses 32, so that a slot formed by the guide plate 3 and the inner flame tube ring 2 under the condition of thermal deformation can provide a stable and efficient cooling air film for the outer flame tube ring 1 and the inner flame tube ring 2. Because there is the difference in the wall temperature of guide plate 3 and head 21 under the hot state, lead to its inflation volume to have the difference, for the slot between guide plate 3 and the head 21 provides stable effectual originated cooling air film for flame tube outer loop 1 and flame tube inner ring 2 under guaranteeing this state, set up a plurality of spacing bosss 32 in guide plate 3 cooling side, avoid setting up the air film groove at flame tube outer loop 1 and flame tube inner ring 2 initial position, simplify the structure of flame tube.
The guide plate 3 is provided with a plurality of diverging holes 36 with variable tangential angles alpha, the diverging holes 36 are in a multi-circle concentric circle array, and the diverging holes 36 are used for forming a fully-covered cooling air film. The structure of the divergent holes 36 is shown in figures 4 and 5, the tangential angle alpha of the divergent holes 36 ranges from 45 degrees to 90 degrees, the aperture range phi of the divergent holes 36 ranges from 0.5mm to phi 0.8mm, and the inclination angle beta needs to be less than 30 degrees. Preferably, the tangential angle α of the diverging holes 36 decreases in order from the innermost turn to the outermost turn. The above arrangement of the diverging holes 36 is advantageous in improving the cooling efficiency. The tangential angle alpha refers to an included angle between the projection of the central axis of the diverging hole 36 to the plane of the guide plate 3, the circle center of the diverging hole 36 and the central connecting line of the swirler mounting ring 31, and the inclination angle beta refers to an included angle between the central axis of the diverging hole 36 and a drilling horizontal plane. Compare traditional impingement cooling, adopt more advanced impact to add the cooling method who diverges, formed the full coverage air film at the flame tube head, strengthened the heat protection effect of flame tube head.
The flow process of the flame tube head cooling gas is as follows:
the cooling air enters the double-wall cavity formed by the inner ring 2 of the flame tube and the guide plate 3 from the two channels through the impact holes 27 of the head 21 and is divided into three parts, the first part of the cooling air enters the flame tube through the divergence holes 36 on the guide plate 3, and a fully-covered cooling air film is formed on the gas side of the head 21, so that the thermal protection of the guide plate 3 is realized, and the local overhigh temperature, ablation, deformation and carbon deposition are prevented. The second part of cooling gas enters the flame tube through the annular slot formed by the turned edge 372 of the guide plate 3 and the inner ring 2 of the flame tube, and an adherent gas film is formed in the gap between the guide plate 3 and the head 21, so that the outer ring 1 of the flame tube and the inner ring 2 of the flame tube are efficiently cooled, and the front ends of the inner ring 2 of the flame tube and the outer ring 1 of the flame tube are prevented from being ablated. And a third part of cooling gas enters an annular slot formed between the swirler 4 and the swirler mounting ring 31 through the cooling hole 33, and the third part of cooling gas realizes thermal protection at the outlet of the swirler 4 and prevents the swirler 4 from ablation or carbon deposition. The two channels are airflow channels between the flame tube and the casing.
The invention also provides a gas turbine engine comprising the flame tube.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (12)
1. A baffle, comprising: the vortex device comprises a vortex device mounting ring (31), a limiting boss (32), a mounting boss (35), a diverging hole (36) and a base plate (37);
the base plate (37) is of a double-flanging annular structure; the base plate (37) comprises an annular plate (371) and a curl (372);
the swirler mounting rings (31) are uniformly arranged on the annular plate (371) in the circumferential direction;
the limiting bosses (32) are arranged at the upper end and the lower end of the cooling side of the base plate (37);
the mounting bosses (35) are arranged on the cooling side of the substrate (37);
the plurality of diverging holes (36) are arranged on the annular plate (371) and are positioned on the periphery of the swirler mounting ring (31);
the diverging holes (36) are a multi-circle concentric circular array, and the tangential angle of the diverging holes (36) ranges from 45 degrees to 90 degrees; the angle of inclination of the diverging holes (36) is less than 30 °; the aperture range of the divergent hole (36) is phi 0.5 mm-phi 0.8mm; the diverging holes (36) are used for forming a fully covered cooling air film.
2. The baffle of claim 1, wherein the mounting boss (35) has a height L;
the mounting boss (35) is used for axial positioning;
wherein the value range of L is 2-4 times of the diameter of the impact hole (27).
3. The deflector of claim 2, wherein the height of the limit boss (32) is lower than the height of the mounting boss (35).
4. The baffle of claim 1, further comprising cooling holes (33);
the cooling holes (33) are uniformly arranged on the swirler mounting ring (31).
5. The baffle of claim 1, further comprising a screw (34);
the plurality of screws (34) are arranged at the central position between the swirler mounting rings (31) on the cooling side of the base plate (37);
and mounting bosses (35) are arranged around the bottoms of the plurality of screw rods (34).
6. A flame tube comprising the baffle of any of claims 1-5, comprising: the flame tube comprises a flame tube outer ring (1), a flame tube inner ring (2), a guide plate (3) and a swirler (4);
the flame tube outer ring (1) is connected with the flame tube inner ring (2);
the guide plate (3) is arranged on the inner side of the inner ring (2) of the flame tube; the guide plate (3) is of an integral double-flanging annular structure;
the swirler (4) is arranged between the inner ring (2) of the flame tube and the guide plate (3).
7. The flame tube of claim 6,
the flame tube outer ring (1) comprises an outer ring cylinder body (11), a large bent pipe (12) and an outer ring mounting edge (13); the outer ring (1) of the flame tube is of an integrated structure; the outer ring mounting edge (13) is perpendicular to the outer wall surface of the outer ring cylinder body (11); a plurality of outer ring bolt holes (14) are uniformly formed in the circumferential direction of the outer ring mounting edge (13);
the inner ring (2) of the flame tube comprises a head (21), an inner ring tube body (22), a small bent tube (23) and an inner ring mounting edge (24); the inner ring (2) of the flame tube is of an integrated structure; the inner ring mounting edge (24) is perpendicular to the outer wall surface of the inner ring cylinder body (22); a plurality of inner ring bolt holes (26) are uniformly formed in the circumferential direction of the inner ring mounting edge (24);
the outer ring mounting edge (13) is connected with the inner ring mounting edge (24) through bolts or screws.
8. The flame tube of claim 7, wherein the head (21) comprises a swirler mount (25), impingement holes (27) and through holes (28);
the swirler mounting seats (25) are uniformly arranged in the straight area of the head (21) in the circumferential direction;
the plurality of the impact holes (27) are arranged in a straight area of the head (21), are positioned around the swirler mounting seat (25) and are in a multi-ring concentric circular array;
the plurality of through holes (28) are provided at a central position between the swirler mounts (25) of the head (21).
9. The liner according to claim 7, wherein the deflector (3) is bolted to the gas side of the head (21).
10. The flame tube of claim 6, wherein the deflector (3) comprises a base plate (37), the base plate (37) comprising an annular plate (371) and a bead (372); the distance between the annular plate (371) and the inner ring (2) of the flame tube is L; the curled edge (372) and the inner flame tube ring (2) form an annular slot, the width of the slot is H, and the slot is used for guiding cooling airflow to flow and providing a stable and efficient initial cooling air film for the outer flame tube ring (1) and the inner flame tube ring (2);
wherein L is the height of the mounting boss (35), and the value range of L is 2-4 times of the diameter of the impact hole (27); the value range of H is 1.5-2.0 mm.
11. The flame tube according to claim 8, characterized in that the swirler (4) is movably arranged between a swirler mounting ring (31) and a swirler mounting (25); the outer diameter of the swirler (4) is smaller than the inner diameters of the swirler mounting ring (31) and the swirler mounting seat (25).
12. A gas turbine engine comprising a combustor basket as claimed in any one of claims 6 to 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111128730.6A CN113819492B (en) | 2021-09-26 | 2021-09-26 | Guide plate, flame tube and gas turbine engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111128730.6A CN113819492B (en) | 2021-09-26 | 2021-09-26 | Guide plate, flame tube and gas turbine engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113819492A CN113819492A (en) | 2021-12-21 |
| CN113819492B true CN113819492B (en) | 2022-11-25 |
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Family Applications (1)
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| CN202111128730.6A Active CN113819492B (en) | 2021-09-26 | 2021-09-26 | Guide plate, flame tube and gas turbine engine |
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| CN109945233B (en) * | 2019-03-20 | 2021-01-29 | 中国航发湖南动力机械研究所 | Combustion chamber, atomization device thereof and aviation gas turbine engine |
| CN110925797A (en) * | 2019-12-05 | 2020-03-27 | 中国航发四川燃气涡轮研究院 | Aircraft engine combustion chamber flame tube head cooling positioning structure |
| CN112484077B (en) * | 2020-11-25 | 2022-04-01 | 中国科学院工程热物理研究所 | Efficient cooling structure for head of flame tube |
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