Combustion chamber tile

Abstract

The utility model provides a combustion chamber tile which comprises a tile body, the tile body is provided with a first surface and a second surface which are oppositely arranged, and a first cooling layer close to the first surface and a second cooling layer close to the second surface are further arranged in the tile body. The first cooling layer comprises a plurality of first cooling channels arranged along the first side edge of the tile block body at intervals, and the second cooling layer comprises a plurality of second cooling channels arranged along the second side edge of the tile block body at intervals. The first cooling channel and the second cooling channel adopt one or more of a V-shaped rib channel, a bending channel, a bamboo joint channel, a circular ring channel and a pit channel; compared with a combustion chamber tile which adopts a long and straight cooling channel and internally applies a V-shaped rib channel, a bent channel, a bamboo joint channel, a circular ring channel and a pit channel, the temperature of the outer surface of the combustion chamber tile is obviously reduced under the condition that the same cold air volume is used.

Description

Technical Field

[0001] The utility model relates to the technical field of gas turbine engines, in particular to a combustion chamber tile. Background Art

[0002] As the performance of gas turbines continues to improve, the inlet pressure, temperature and outlet temperature rise of the combustion chamber gradually increase, the heat radiation intensity of the flame to the combustion chamber tiles is increasing, while the temperature of the cooling air is increasing, and the amount of available cooling air is decreasing. In order to prevent the life of the combustion chamber or engine from being reduced due to high temperature, it is currently urgent to improve the over-temperature phenomenon of the combustion chamber tiles to ensure the safe and stable operation of the gas turbine. Utility Model Content

[0003] The utility model aims to provide a combustion chamber tile, which has a double-layer cooling channel inside and can effectively reduce the surface temperature of the combustion chamber tile.

[0004] The utility model provides a combustion chamber tile, comprising a tile body, wherein the tile body has a first surface and a second surface arranged opposite to each other, wherein a first cooling layer close to the first surface and a second cooling layer close to the second surface are further arranged in the tile body, wherein the first cooling layer comprises a plurality of first cooling channels arranged at intervals along a first side edge of the tile body, and the second cooling layer comprises a plurality of second cooling channels arranged at intervals along a second side edge of the tile body, wherein the first cooling channel and the second cooling channel adopt one or more of a V-shaped rib channel, a bent channel, a bamboo channel, a circular channel and a concave channel;

[0005] A plurality of V-shaped ribs are provided on the inner wall of the V-shaped rib channel, and the plurality of V-shaped ribs are arranged at intervals along the axial direction of the V-shaped rib channel;

[0006] The bending channel comprises a plurality of bending portions connected in sequence, and the bending portions are in a < shape;

[0007] The bamboo passage comprises a plurality of bamboo grooves spaced apart along its axial direction, and the cross section of the bamboo passage is rectangular;

[0008] The annular channel comprises a plurality of annular grooves spaced apart along its axial direction, and the cross section of the annular channel is circular;

[0009] A plurality of pits are arranged on the inner wall of the pit channel.

[0010] Preferably, the first surface is the hot side and the second surface is the cold side.

[0011] Preferably, the first cooling channel is a V-shaped rib channel, and the second cooling channel is a bent channel.

[0012] Preferably, the first cooling channel and the second cooling channel are both bamboo-joint channels.

[0013] Preferably, the first cooling channel is a circular channel, and the second cooling channel is a concave channel.

[0014] Preferably, the annular groove comprises a first annular groove and a second annular groove, and the axial length of the first annular groove is smaller than the axial length of the second annular groove.

[0015] Preferably, the cross-section of the V-shaped rib channel is rectangular.

[0016] Preferably, the cross-section of the pit channel is rectangular, and a plurality of pits are provided on four side surfaces of the inner wall of the pit channel.

[0017] The utility model is beneficial in that a double cooling layer is provided inside, and the cooling channel selected for each cooling layer is a V-shaped rib channel, a bending channel, a bamboo channel, a ring channel or a pit channel. Compared with the use of a long straight cooling channel, the combustion chamber tile with a V-shaped rib channel, a bending channel, a bamboo channel, a ring channel, and a pit channel inside has a significantly lower outer surface temperature under the condition of using the same amount of cold air. The above cooling channel can effectively enhance the heat exchange in the combustion chamber tile, thereby achieving the purpose of reducing the temperature of the combustion chamber tile and extending the life of the combustion chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional diagram of the combustion chamber tile of the utility model;

[0019] Figure 2 It is a three-dimensional image of the V-rib channel;

[0020] Figure 3 It is the top view, front view and CC-direction cross-sectional view of the V-shaped rib channel;

[0021] Figure 4 It is a top view and a three-dimensional view of the bending channel;

[0022] Figure 5 It is the top view, stereoscopic view and DD-direction cross-sectional view of the bamboo passage;

[0023] Figure 6 It is the top view, stereogram and EE-direction cross-sectional view of the circular channel;

[0024] Figure 7 It is a top view, a three-dimensional view and a cross-sectional view in the FF direction of the pit channel;

[0025] Figure 8 is a distribution diagram of cooling channels inside the combustion chamber tile in Example 1;

[0026] Fig. 9 The temperature distribution diagram of the combustion chamber tile surface and the temperature distribution diagram of the cooling channel in the first embodiment;

[0027] Fig.10 is a distribution diagram of cooling channels inside the combustion chamber tile in the second embodiment;

[0028] Fig.11 The three-dimensional temperature distribution diagram of the combustion chamber tile surface and the temperature distribution diagram of the cooling channel in the second embodiment;

[0029] Fig.12 is a distribution diagram of cooling channels inside the combustion chamber tile in the third embodiment;

[0030] Fig.13 The three-dimensional temperature distribution diagram of the combustion chamber tile surface and the temperature distribution diagram of the cooling channel in the third embodiment;

[0031] Fig.14 It is a three-dimensional temperature distribution diagram of the surface of the combustion chamber tile with a long straight cooling channel inside and a temperature distribution diagram at the cooling channel;

[0032] Fig.15 This is a comparison chart of the maximum temperature and average temperature of the outer surface of four combustion chamber tiles with different cooling channels (constant flow);

[0033] Fig.16 This is a comparison chart of the outer surface temperature and cooling air consumption of four combustion chamber tiles with different cooling channels (constant pressure).

[0034] Component number description:

[0035] 1 Tile body

[0036] 11. First cooling channel

[0037] 12 Second cooling channel

[0038] 13 First Surface

[0039] 14 Second Surface

[0040] 2 V-ribbed channels

[0041] 21 V-shaped ribs

[0042] 3 Bend Channel

[0043] 31 Bending part

[0044] 4 Bamboo Passage

[0045] 41 Bamboo Groove

[0046] 5 Ring Passage

[0047] 51 First ring groove

[0048] 52 Second ring groove

[0049] 6. Pit Channel

[0050] 61 pit DETAILED DESCRIPTION

[0051] The following is a further detailed description of the specific implementations of the present invention in conjunction with the accompanying drawings. These implementations are only used to illustrate the present invention, but not to limit the present invention.

[0052] In the description of the present invention, it should be noted that the terms "inside" and "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0053] In addition, in the description of the present invention, unless otherwise specified, “plurality” means two or more.

[0054] like Figure 1 As shown, the utility model provides a combustion chamber tile, which includes a tile body 1, the tile body 1 has a first surface 13 and a second surface 14 arranged opposite to each other, and a first cooling layer close to the first surface 13 and a second cooling layer close to the second surface 14 are also provided in the tile body 1. The first cooling layer includes a plurality of first cooling channels 11 arranged at intervals along the first side of the tile body 1, and the second cooling layer includes a plurality of second cooling channels 12 arranged at intervals along the second side of the tile body 1. The first cooling channel 11 and the second cooling channel 12 adopt one or more of a V-shaped rib channel 2, a bent channel 3, a bamboo channel 4, a circular channel 5 and a pit channel 6. The first side of the tile body 1 is adjacent to the second side, and the two are arranged non-parallel, so the plurality of first cooling channels 11 and the plurality of second cooling channels 12 are arranged in a staggered manner horizontally and vertically to form a double-layer cooling layer covering the entire first surface 13 and the second surface 14. The tile body 1 is made of metal.

[0055] Specifically, the openings at both ends of the first cooling channel 11 and the second cooling channel 12 are respectively arranged on the four sides of the tile body 1, and the four sides are all located between the first surface 13 and the second surface 14. The first surface 13 is the hot side, close to the combustion chamber; the second surface 14 is the cold side, which is installed on the combustion chamber shell through the mounting member. During operation, the cooling gas flows from the cooling gas channel opened in the combustion chamber shell into the gap between two adjacent tile bodies 1, enters the interior of the tile body 1 through the openings at the ends of the first cooling channel 11 and the second cooling channel 12, and finally flows into the combustion chamber through the gap between two adjacent tile bodies 1.

[0056] Figure 2 and Figure 3 The outer boundary of the hollow inner space of the V-shaped rib channel 2 is shown. A plurality of V-shaped ribs 21 are provided on the inner wall of the V-shaped rib channel 2, and the plurality of V-shaped ribs 21 are arranged at intervals along the axial direction of the V-shaped rib channel 2. The angle α of the V-shaped rib 21 is 30°-180°. The ratio of the height e of the V-shaped rib 21 (i.e., the distance from the inner wall of the V-shaped rib channel 2 to the end face of the V-shaped rib 21) to the hydraulic diameter d1 of the V-shaped rib channel 2 is 0.05-0.2. The ratio of the thickness b1 of the V-shaped rib 21 to the hydraulic diameter d1 of the V-shaped rib channel 2 is 1-1.5. The ratio of the spacing p1 between two adjacent V-shaped ribs 21 (i.e., the axial distance between the two V-shaped tips) to the height e of the V-shaped rib 21 is 6-12. The cross-sectional shape of the V-shaped rib channel 2 is not limited and can be circular or rectangular. When the cross-section is rectangular, a plurality of V-shaped ribs 21 are arranged at intervals on one of the side surfaces of the V-shaped rib channel 2.

[0057] Figure 4 The outer boundary of the hollow inner space of the bending channel 3 is shown. The bending channel 3 includes a plurality of bending portions 31 connected end to end in sequence, each bending portion 31 includes two straight tubes connected in a < shape, the angle β between the two straight tubes is 90°-150°, and the ratio of the length l of each straight tube to the hydraulic diameter d2 of the bending channel 3 is 2-5. The cross-sectional shape of the straight tube is not limited and can be circular or rectangular.

[0058] Figure 5 The outer boundary of the hollow inner space of the bamboo channel 4 is shown. The bamboo channel 4 includes a plurality of bamboo grooves 41 spaced apart along its own axial direction, and the cross section of the bamboo channel 4 is rectangular. The ratio of the spacing between two adjacent bamboo grooves 41 (i.e., the axial spacing between the corresponding same sides of two adjacent bamboo grooves 41) to the hydraulic diameter d3 of the bamboo channel 4 is 2-5. The ratio of the axial length b2 of the bamboo groove 41 to the hydraulic diameter d3 of the bamboo channel 4 is 1-2. The ratio of the unilateral expansion distance a of the bamboo groove 41 (i.e., the spacing between the bamboo groove 41 and the inner wall on the same side of the bamboo channel 4) to the hydraulic diameter d3 of the bamboo channel 4 is 0.1-0.3.

[0059] Figure 6 The outer boundary of the hollow inner space of the annular channel 5 is shown. The annular channel 5 includes a plurality of annular grooves spaced along its own axial direction, and the cross section of the annular channel 5 is circular. The ratio of the spacing p3 between two adjacent annular grooves to the hydraulic diameter d4 of the annular channel 5 is 1-3, the ratio of the axial length h of the annular groove to the hydraulic diameter d4 of the annular channel 5 is =0.2-0.8, and the ratio of the radial unilateral expansion dimension c of the annular groove (the radial spacing between the annular groove and the inner wall of the annular channel 5) to the hydraulic diameter d4 of the annular channel 5 is 0.1-0.15. Specifically, the annular groove includes a first annular groove 51 and a second annular groove 52, and the axial length of the first annular groove 51 is less than the axial length of the second annular groove 52. The first annular groove 51 and the second annular groove 52 are staggered along the axial spacing of the annular channel 5.

[0060] Figure 7 The outer boundary of the hollow inner space of the pit channel 6 is shown. A plurality of pits 61 are provided on the inner wall of the pit channel 6, and the plurality of pits 61 can be divided into a plurality of groups, each group of pits includes four pits 61 distributed along the circumferential direction of the pit channel 6, and the plurality of groups of pits are distributed along the axial direction of the pit channel 6. The ratio of the pit depth g (i.e., the distance from the inner wall of the pit channel 6 to the deepest part of the pit 61) to the hydraulic diameter d5 of the pit channel 6 is 0.1-0.2, and the angle θ between the axis of the pit 61 and the center line of the pit channel 6 is 10°-90°. The cross-sectional shape of the pit channel 6 is not limited, and can be circular or rectangular. When the cross section is rectangular, the four pits 61 in each group of pits are respectively arranged on the four sides of the pit channel 6.

[0061] Compared with the long straight cooling channels of equal diameter commonly used in the prior art, the cooling channels adopted in the present invention are all of variable diameter structure, which can increase the flow rate of the cooling gas and enhance the heat exchange between the cooling gas and the inner wall of the tile body 1 by generating turbulent flow near the inner wall of the cooling channel.

[0062] The following are three embodiments of the present utility model. In the following three embodiments, the first surface 13 is the hot side, close to the combustion chamber; the second surface 14 is the cold side, mounted on the combustion chamber housing through a mounting component.

[0063] Embodiment 1: Figure 1 and Figure 8 As shown, the first cooling channel 11 adopts a V-shaped rib channel 2 , and the second cooling channel 12 adopts a bent channel 3 .

[0064] Embodiment 2: Figure 1 and Fig.10 As shown, the first cooling channel 11 and the second cooling channel 12 both adopt bamboo channel 4 .

[0065] Embodiment 3: Figure 1 and Fig.12 As shown, the first cooling channel 11 adopts the annular channel 5 , and the second cooling channel 12 adopts the pit channel 6 .

[0066] Combination Fig. 9 , Fig.11 , Fig.13 , Figure 14-16 It can be seen that in order to verify that the combustion chamber tile provided by the utility model has advanced cooling performance, the utility model uses CFD numerical method to simulate the three-dimensional temperature distribution of the surface of the combustion chamber tile with a long straight cooling channel inside and the combustion chamber tile in the above three embodiments. Under the same cold air volume condition, the cooling channel design of the three embodiments can reduce the average surface temperature of the combustion chamber tile (i.e., the first surface average temperature) by 20-66K. From another perspective, when the unit is running, the pressure difference between the cold air inlet and outlet is fixed. Fig.16 It can be seen that the cooling channel design of the utility model can increase the turbulence of the cold air and enhance the heat exchange between the cold air and the inner wall of the tile body 1. While reducing the amount of cold air used, the temperature of the outer wall of the tile body 1 decreases, thereby effectively reducing the risk of combustion chamber tile ablation.

[0067] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A combustion chamber tile, characterized in that: The tile body comprises a tile main body, the tile main body has a first surface and a second surface arranged opposite to each other, a first cooling layer close to the first surface and a second cooling layer close to the second surface are further arranged in the tile main body, the first cooling layer comprises a plurality of first cooling channels arranged at intervals along a first side edge of the tile main body, the second cooling layer comprises a plurality of second cooling channels arranged at intervals along a second side edge of the tile main body, the first cooling channel and the second cooling channel are one or more of a V-shaped rib channel, a bent channel, a bamboo channel, a circular channel and a concave channel; A plurality of V-shaped ribs are provided on the inner wall of the V-shaped rib channel, and the plurality of V-shaped ribs are arranged at intervals along the axial direction of the V-shaped rib channel; The bending channel comprises a plurality of bending portions connected in sequence, and the bending portions are in a < shape; The bamboo passage comprises a plurality of bamboo grooves spaced apart along its axial direction, and the cross section of the bamboo passage is rectangular; The annular channel comprises a plurality of annular grooves spaced apart along its axial direction, and the cross section of the annular channel is circular; A plurality of pits are arranged on the inner wall of the pit channel.

2. The combustion chamber block according to claim 1, characterized in that The first surface is the hot side and the second surface is the cold side.

3. The combustion chamber tile according to claim 1 or 2, characterized in that: The first cooling channel is a V-shaped rib channel, and the second cooling channel is a bent channel.

4. The combustion chamber tile according to claim 1 or 2, characterized in that: The first cooling channel and the second cooling channel are both bamboo-jointed channels.

5. The combustion chamber tile according to claim 1 or 2, characterized in that: The first cooling channel is a circular channel, and the second cooling channel is a concave channel.

6. The combustion chamber block according to claim 1, characterized in that The annular groove includes a first annular groove and a second annular groove, and the axial length of the first annular groove is smaller than the axial length of the second annular groove.

7. The combustion chamber block according to claim 1, characterized in that The cross section of the V-shaped rib channel is rectangular.

8. The combustion chamber block according to claim 1, characterized in that The cross section of the pit channel is rectangular, and a plurality of pits are arranged on four side surfaces of the inner wall of the pit channel.

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