Swirler with sector-ring-shaped outlet

Abstract

The invention provides a fan-ring-shaped outlet swirler, which belongs to the technical field of aero-engines, is arranged at an inlet of a flame tube of a main combustion chamber, and comprises an outer ring, outer ring blades, a middle ring, middle blades and an inner ring, the outer ring, the middle ring and the inner ring are sequentially arranged from outside to inside, the outer ring blades are arranged between the outer ring and the middle ring, and the middle blades are arranged between the outer ring and the middle ring. The middle blades are arranged between the middle ring and the inner ring, an outlet of the outer ring is of a first sector ring structure, an outlet of the middle ring is of a second sector ring structure, and the first sector ring structure and the second sector ring structure are both of external expansion structures. According to the treatment scheme, the head backflow area formed by the outer ring of the swirler is optimized into the sector ring shape from the circular shape, the space size of fuel oil mixing, diffusion and atomization and the space size of the head backflow area can be enlarged, the uniformity of an oil mist field in the flame tube is improved, the temperature field in the flame tube is improved, and the temperature distribution of an outlet of a main combustion chamber is optimized.

Description

Technical Field

[0001] This application relates to the technical field of aeroengines, and particularly to a fan-shaped annular exit swirl vane. Background Art

[0002] The temperature distribution at the exit of the main combustion chamber of an aeroengine is an important design index of the main combustion chamber. The quality of the exit temperature distribution directly affects the life and reliability of the high-pressure turbine and plays an important role in the safety of the engine. However, the uniformity of the existing temperature distribution at the exit of the main combustion chamber is still poor. Summary of the Invention

[0003] In view of this, an embodiment of this application provides a fan-shaped annular exit swirl vane, which is used to expand the spatial dimensions of fuel mixing, diffusion, atomization, and the head recirculation zone, improve the uniformity of the oil mist field in the flame tube, improve the temperature field in the flame tube, and optimize the temperature distribution at the exit of the main combustion chamber.

[0004] An embodiment of this application provides a fan-shaped annular exit swirl vane, which is arranged at the inlet of the flame tube of the main combustion chamber. The fan-shaped annular exit swirl vane includes an outer ring, outer ring vanes, an intermediate ring, intermediate vanes, and an inner ring. The outer ring, intermediate ring, and inner ring are arranged in sequence from outside to inside. The outer ring vanes are arranged between the outer ring and the intermediate ring, and the intermediate vanes are arranged between the intermediate ring and the inner ring. The exit of the outer ring is set as a first fan-shaped annular structure, and the exit of the intermediate ring is set as a second fan-shaped annular structure. Both the first fan-shaped annular structure and the second fan-shaped annular structure are outward-expanding structures.

[0005] According to a specific implementation manner of an embodiment of this application, a first circular throat is provided on the exit side of the outer ring. The first fan-shaped annular structure is a special-shaped structure that gradually transitions from the first circular throat along the axial direction of the swirl vane to the shape of the exit fan ring.

[0006] According to a specific implementation manner of an embodiment of this application, the first fan-shaped annular structure includes a first transition section, and a first fan ring upper wall, a first fan ring left side wall, a first fan ring lower wall, and a first fan ring right side wall that are sequentially connected to form the shape of the exit fan ring. The first fan ring upper wall, the first fan ring left side wall, the first fan ring lower wall, and the first fan ring right side wall are respectively connected to the first circular throat through the first transition section in a transitional manner, and gradually expand outward along the axis direction of the swirl vane.

[0007] According to a specific implementation manner of an embodiment of this application, the first fan ring upper wall and the first fan ring lower wall are respectively set as arc structures, and the bending directions of the arc structures of the first fan ring upper wall and the first fan ring lower wall are the same.

[0008] According to a specific implementation manner of an embodiment of this application, the first fan ring upper wall, the first fan ring left side wall, the first fan ring lower wall, and the first fan ring right side wall are sequentially connected through a first transition fillet.

[0009] According to a specific implementation manner of an embodiment of the present application, the first transition section is set as a linear interpolation transition structure from the first circular throat to the outlet fan-shaped ring.

[0010] According to a specific implementation manner of an embodiment of the present application, a second circular throat is provided on the outlet side of the middle ring, and the second fan-shaped ring structure is a special-shaped structure that gradually transitions from the second circular throat to the outlet fan-shaped ring along the axial direction of the swirler.

[0011] According to a specific implementation manner of an embodiment of the present application, the second fan-shaped ring structure includes a second transition section and a second fan-shaped upper ring wall, a second fan-shaped left side wall, a second fan-shaped lower ring wall, and a second fan-shaped right side wall that are sequentially connected to form an outlet fan-shaped ring. The second fan-shaped upper ring wall, the second fan-shaped left side wall, the second fan-shaped lower ring wall, and the second fan-shaped right side wall are respectively transitionally connected to the second circular throat through the second transition section and gradually expand outward from the second circular throat along the axis direction of the swirler.

[0012] According to a specific implementation manner of an embodiment of the present application, the second fan-shaped upper ring wall and the second fan-shaped lower ring wall are respectively set as arc structures.

[0013] According to a specific implementation manner of an embodiment of the present application, the second fan-shaped upper ring wall, the second fan-shaped left side wall, the second fan-shaped lower ring wall, and the second fan-shaped right side wall are sequentially connected through a second transition fillet.

[0014] Beneficial effects:

[0015] In the fan-shaped outlet swirler in the embodiment of the present application, by designing the outer ring and the outlet of the middle ring of the swirler as a fan-shaped structure, the fuel concentration field formed by the middle ring of the swirler is optimized from a circle to a fan-shaped ring, and the head recirculation zone formed by the outer ring of the swirler is optimized from a circle to a fan-shaped ring, which can expand the spatial dimensions of fuel mixing, diffusion, atomization, and the head recirculation zone, improve the uniformity of the oil mist field in the combustion chamber, improve the temperature field in the combustion chamber, and optimize the temperature distribution at the outlet of the main combustion chamber. Description of the drawings

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 It is the front view of the fan-shaped outlet swirler according to an embodiment of the present invention;

[0018] Figure 2 It is the right view of the fan-shaped outlet swirler according to an embodiment of the present invention;

[0019] Figure 3 A three-dimensional structure diagram of a sector-ring-shaped outlet swirler according to an embodiment of the present invention;

[0020] Figure 4 A schematic diagram showing the temperature distribution at the outlet of a combustor liner corresponding to a swirler of the prior art;

[0021] Figure 5 A schematic diagram showing the temperature distribution at the outlet of a combustor liner corresponding to a sector-ring-shaped outlet swirler according to an embodiment of the present invention.

[0022] In the figure: 1. Outer ring; 2. Outer ring vane; 3. Intermediate ring; 4. Intermediate vane; 5. Inner ring; 102. First circular throat; 104. Upper ring wall of the first sector ring; 105. Left side wall of the first sector ring; 106. Lower ring wall of the first sector ring; 107. Right side wall of the first sector ring; 108. First transition fillet; 109. First transition section; 302. Second circular throat; 304. Upper ring wall of the second sector ring; 305. Left side wall of the second sector ring; 306. Lower ring wall of the second sector ring; 307. Right side wall of the second sector ring; 308. Second transition fillet; 309. Second transition section. Detailed implementation manners

[0023] The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0024] The following specific examples illustrate the implementation manners of the present application. Those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts belong to the scope of protection of the present application.

[0025] Note that the following describes various aspects of embodiments within the scope of the appended claims. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is illustrative only. Based on this application, those skilled in the art should understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects set forth herein can be used to implement a device and / or practice a method. Additionally, this device and / or method can be implemented using other structures and / or functionality in addition to one or more of the aspects set forth herein.

[0026] It should also be noted that the diagrams provided in the following embodiments only illustrate the basic concept of this application schematically. Only the components related to this application are shown in the diagrams, rather than being drawn according to the number, shape, and size of the components in actual implementation. The type, quantity, and ratio of each component in actual implementation can be arbitrarily changed, and the component layout type may also be more complex.

[0027] In addition, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that the aspects can be practiced without these specific details.

[0028] An embodiment of this application provides a fan-shaped annular outlet swirler, which will be described in detail below with reference to Figures 1 to 5 for details.

[0029] In one embodiment, the fan-shaped annular outlet swirler is arranged at the inlet of the main combustion chamber flame tube. The fan-shaped annular outlet swirler includes an outer ring 1, outer ring vanes 2, an intermediate ring 3, intermediate vanes 4, and an inner ring 5. The outer ring 1, the intermediate ring 3, and the inner ring 5 are arranged in sequence from outside to inside. The outer ring vanes 2 are arranged between the outer ring 1 and the intermediate ring 3, and the intermediate vanes 4 are arranged between the intermediate ring 3 and the inner ring 5. The outlet of the outer ring 1 is set as a first fan-shaped structure, and the outlet of the intermediate ring 3 is set as a second fan-shaped structure. Both the first fan-shaped structure and the second fan-shaped structure are outward-expanding structures.

[0030] In this embodiment, based on the conventional engine main combustion chamber swirler, by designing the outlets of the swirler outer ring 1 and the intermediate ring 3 as fan-shaped structures, optimizing the fuel concentration field formed by the swirler intermediate ring 3 from circular to fan-shaped, and optimizing the head recirculation zone formed by the swirler outer ring 1 from circular to fan-shaped, it is possible to expand the spatial dimensions of fuel mixing, diffusion, atomization, and the head recirculation zone, improve the uniformity of the oil mist field in the flame tube, improve the temperature field in the flame tube, and optimize the temperature distribution at the outlet of the main combustion chamber.

[0031] Refer to Figure 4 and Figure 5By comparing the flame liner outlet temperature distributions of the fan-shaped outlet swirler in this embodiment with those of a prior art swirler, the authors detailed the dumbbell-shaped outlet temperature distribution corresponding to the circular outlet swirler and the nearly full-length fan-shaped outlet temperature distribution corresponding to the fan-shaped outlet swirler. Clearly, the fan-shaped outlet swirler in this embodiment achieves a more uniform flame liner outlet temperature distribution, improving the temperature field within the flame liner and optimizing the main combustion chamber outlet temperature distribution.

[0032] In one embodiment, a first circular throat 102 is provided on the outlet side of the outer ring 1 , and the first fan-shaped ring structure is a special-shaped structure that gradually transitions from the first circular throat 102 to the outlet fan-shaped ring along the axial direction of the vortex finder.

[0033] In one embodiment, the first fan ring structure includes a first transition section 109 and a first fan ring upper ring wall 104, a first fan ring left side wall 105, a first fan ring lower ring wall 106 and a first fan ring right side wall 107 which are connected in sequence to form the shape of an outlet fan ring. The first fan ring upper ring wall 104, the first fan ring left side wall 105, the first fan ring lower ring wall 106 and the first fan ring right side wall 107 are respectively transitionally connected to the first circular throat 102 through the first transition section 109, and gradually expand outward from the first circular throat 102 along the axis direction of the vortex finder.

[0034] In one embodiment, the first sector ring upper wall 104 and the first sector ring lower wall 106 are respectively configured as arc structures, and the arc structures of the first sector ring upper wall 104 and the first sector ring lower wall 106 have the same bending direction.

[0035] In one embodiment, the first sector ring upper wall 104 , the first sector ring left wall 105 , the first sector ring lower wall 106 and the first sector ring right wall 107 are sequentially connected by first transition fillets 108 .

[0036] In one embodiment, the first transition section 109 is configured as a linear interpolation transition structure from the first circular throat 102 to the outlet sector ring shape.

[0037] During specific implementation, the intersection (intersection a) of the outlet plane (plane A) of the vortex finder outer ring 1 of the circular outlet vortex finder scheme (Scheme A) that has been initially designed and the engine axis is taken as the center of the circle, and the first fan ring upper ring wall 104 of the first fan ring structure at the outlet of the vortex finder outer ring 1 is an inscribed arc located in plane A, with the intersection a as the center of the circle, and formed with the circular outlet of the vortex finder outer ring 1 of Scheme A.

[0038] The first sector ring lower ring wall 106 of the first sector ring structure of the outlet of the vortex finder outer ring 1 is a circumscribed arc located in plane A with the intersection a as the center and formed with the circular outlet of the vortex finder outer ring 1 of scheme A.

[0039] The left side wall 105 and the right side wall 107 of the first fan-shaped ring of the first fan-shaped ring structure at the outlet of the outer ring 1 of the swirl device are straight edges, and this straight line is formed by making a tangent to the circular outlet of the outer ring 1 of the swirl device of Scheme A from the intersection point a in plane A.

[0040] In one embodiment, a second circular throat 302 is provided on the outlet side of the intermediate ring 3, and the second fan-shaped ring structure is a special-shaped structure that gradually transitions from the second circular throat 302 to the shape of the outlet fan-shaped ring along the axial direction of the swirl device.

[0041] In one embodiment, the second fan-shaped ring structure includes a second transition section 309 and a second fan-shaped ring upper wall 304, a second fan-shaped ring left side wall 306, a second fan-shaped ring lower wall 306, and a second fan-shaped ring right side wall 307 that are sequentially connected to form the shape of the outlet fan-shaped ring. The second fan-shaped ring upper wall 304, the second fan-shaped ring left side wall 306, the second fan-shaped ring lower wall 306, and the second fan-shaped ring right side wall 307 are respectively transitionally connected to the second circular throat 302 through the second transition section 309, and gradually expand outward along the axial direction of the swirl device starting from the second circular throat 302.

[0042] In one embodiment, the second fan-shaped ring upper wall 304 and the second fan-shaped ring lower wall 306 are respectively arranged as arc structures.

[0043] In one embodiment, the second fan-shaped ring upper wall 304, the second fan-shaped ring left side wall 306, the second fan-shaped ring lower wall 306, and the second fan-shaped ring right side wall 307 are sequentially connected through a second transition fillet 308.

[0044] In one embodiment, the second transition section 309 is arranged as a linear interpolation transition structure from the second circular throat 302 to the shape of the outlet fan-shaped ring.

[0045] During specific implementation, with the intersection point (intersection point b) of the outlet plane (plane B) of the intermediate ring 3 of the swirl device of Scheme A and the engine axis as the center, the second fan-shaped ring upper wall 304 of the second fan-shaped ring structure at the outlet of the intermediate ring 3 of the swirl device is an inscribed circular arc in plane B with the intersection point b as the center and formed with the circular outlet of the intermediate ring 3 of the swirl device of Scheme A.

[0046] The second fan-shaped ring lower wall 306 of the second fan-shaped ring structure at the outlet of the intermediate ring 3 of the swirl device is an externally tangent circular arc in plane B with the intersection point b as the center and formed with the circular outlet of the intermediate ring 3 of the swirl device of Scheme A.

[0047] The second fan-shaped ring left side wall 306 and the second fan-shaped ring right side wall 307 of the second fan-shaped ring structure at the outlet of the intermediate ring 3 of the swirl device are straight edges, and this straight line is formed by making a tangent to the circular outlet of the intermediate ring 3 of the swirl device of Scheme A from the intersection point b in plane B.

[0048] In the embodiments provided by the present invention, by designing the outlets of the outer ring 1 and the middle ring 3 of the swirler as fan-shaped ring structures, the fuel concentration field formed by the middle ring 3 of the swirler is optimized from circular to fan-shaped ring, and the head recirculation zone formed by the outer ring 1 of the swirler is optimized from circular to fan-shaped ring, which can expand the spatial dimensions of fuel mixing, diffusion, atomization and the head recirculation zone, improve the uniformity of the oil mist field in the combustion chamber, improve the temperature field in the combustion chamber, and optimize the temperature distribution at the outlet of the main combustion chamber.

[0049] As described above, the above are only specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present application should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A sector-annular exit vane, which is arranged at the inlet of the main combustion chamber flame tube, is characterized in that The fan-shaped annular outlet vane includes an outer ring (1), outer ring vanes (2), an intermediate ring (3), intermediate vanes (4), and an inner ring (5). The outer ring (1), intermediate ring (3), and inner ring (5) are arranged in sequence from outside to inside. The outer ring vanes (2) are arranged between the outer ring (1) and the intermediate ring (3), and the intermediate vanes (4) are arranged between the intermediate ring (3) and the inner ring (5). The outlet of the outer ring is set as a first fan-shaped annular structure, and the outlet of the intermediate ring is set as a second fan-shaped annular structure. Both the first fan-shaped annular structure and the second fan-shaped annular structure are outward-expanding structures.

2. The fan-shaped outlet vortex finder according to claim 1, characterized in that: A first circular throat (102) is provided on the outlet side of the outer ring. The first fan-shaped annular structure is a special-shaped structure that gradually transitions from the first circular throat (102) along the axial direction of the vane to the shape of the outlet fan ring.

3. The fan-shaped outlet vortex finder according to claim 2, characterized in that: The first fan-shaped annular structure includes a first transition section (109), and a first fan ring upper wall (104), a first fan ring left side wall (105), a first fan ring lower wall (106), and a first fan ring right side wall (107) that are sequentially connected to form the shape of the outlet fan ring. The first fan ring upper wall (104), the first fan ring left side wall (105), the first fan ring lower wall (106), and the first fan ring right side wall (107) are respectively transitionally connected to the first circular throat (102) through the first transition section (109), and gradually expand outward along the axial direction of the vane starting from the first circular throat (102).

4. The fan-shaped outlet vortex finder according to claim 3, characterized in that: The first fan ring upper wall (104) and the first fan ring lower wall (106) are respectively set as arc structures, and the bending directions of the arc structures of the first fan ring upper wall (104) and the first fan ring lower wall (106) are the same.

5. The fan-shaped outlet vortex finder according to claim 3, characterized in that: The first fan ring upper wall (104), the first fan ring left side wall (105), the first fan ring lower wall (106), and the first fan ring right side wall (107) are sequentially connected through a first transition fillet (108).

6. The fan-shaped annular outlet vane according to claim 3, wherein The first transition section (109) is set as a linear interpolation transition structure from the first circular throat (102) to the shape of the outlet fan ring.

7. The fan-shaped outlet vortex finder according to claim 1, characterized in that: A second circular throat (302) is provided on the outlet side of the intermediate ring (3). The second fan-shaped annular structure is a special-shaped structure that gradually transitions from the second circular throat (302) along the axial direction of the vane to the shape of the outlet fan ring.

8. The fan-shaped outlet vortex finder according to claim 7, characterized in that: The second fan-shaped annular structure includes a second transition section (309), and a second fan ring upper wall (304), a second fan ring left side wall (305), a second fan ring lower wall (306), and a second fan ring right side wall (307) that are sequentially connected to form the shape of the outlet fan ring. The second fan ring upper wall (304), the second fan ring left side wall (305), the second fan ring lower wall (306), and the second fan ring right side wall (307) are respectively transitionally connected to the second circular throat (302) through the second transition section (309), and gradually expand outward along the axial direction of the vane starting from the second circular throat (302).

9. The fan-shaped outlet vortex finder according to claim 8, characterized in that: The second fan ring upper wall (304) and the second fan ring lower wall (306) are respectively set as arc structures.

10. The fan-shaped outlet vortex finder according to claim 8, characterized in that: The second fan ring upper wall (304), the second fan ring left side wall (305), the second fan ring lower wall (306), and the second fan ring right side wall (307) are sequentially connected through a second transition fillet (308).

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