Snakelike cooling structure for fan-shaped test bed of annular combustion chamber of gas turbine

Abstract

The utility model relates to a snakelike cooling structure for a gas turbine annular combustion chamber fan-shaped test bed. In order to ensure the test reliability, the size of a fan-shaped test bench is generally required to be matched with the number of nozzles, so that the distance between wall plates on two sides of a flame tube of the test bench and a high-temperature area is relatively short, and the wall surface temperature is relatively high. The cooling cover comprises a fan-shaped test bench flame tube side plate, wherein a cooling cover body covering the whole wall plate is fixed on the fan-shaped test bench flame tube side plate; the cooling cover integrally comprises a shell with the same shape as the side plate of the fan-shaped test bed flame tube, a plurality of flow guide ribs are fixed in the shell, and outlet flow guide ribs are fixed on the side, close to a cooling gas outlet, of the shell. The serpentine cooling device is applied to serpentine cooling of the fan-shaped test bed of the gas turbine annular combustion chamber.

Description

Technical Field

[0001] The utility model relates to a serpentine cooling structure for a sector-shaped test bench of an annular combustion chamber of a gas turbine. Background Art

[0002] During the gas turbine design and production process, to ensure that the designed combustor meets performance, safety, and pollutant emissions requirements before integration into the complete unit, combustor pressure modeling and full-temperature, full-pressure testing are required before the complete unit is tested. To reduce testing costs and risks, annular combustors are typically tested using a sector-shaped structure that is a portion of the entire annular tube. To ensure test reliability, the size of the sector-shaped test bench must typically match the number of nozzles. This results in the test bench's flame tube panels being close to the high-temperature zone, resulting in high wall temperatures. This necessitates the design of a unique cooling structure to ensure the safety of the test piece. Utility Model Content

[0003] The purpose of the present utility model is to solve the above-mentioned problems, thereby providing a serpentine cooling structure for a gas turbine annular combustion chamber sector test bench, which can effectively cool the wall temperature of the sector test bench, the cold zone effect is stable and controllable, the cooling efficiency is high, and the safety of the gas turbine combustion chamber test bench is greatly guaranteed.

[0004] The above purpose is achieved through the following technical solutions:

[0005] A serpentine cooling structure for a sector-shaped test bench of an annular combustion chamber of a gas turbine comprises: a flame tube side panel of the sector-shaped test bench, to which a cooling cover covering the entire wall panel is fixed;

[0006] The cooling cover as a whole comprises a shell having the same shape as the side plate of the flame tube of the sector-shaped test bench. A plurality of guide ribs are fixed in the shell, and an outlet guide rib is fixed on the side of the shell near the cooling gas outlet.

[0007] The serpentine cooling structure for a gas turbine annular combustion chamber sector test bench is characterized in that the guide ribs of odd levels are fixed to the top of the shell, and the guide ribs of even levels are fixed to the outlet guide ribs, and multiple guide ribs are staggered to form a serpentine flow channel.

[0008] The serpentine cooling structure for the sector-shaped test bench of the annular combustion chamber of a gas turbine is characterized in that the tip of each guide rib has a semicircular guide structure.

[0009] The serpentine cooling structure for a gas turbine annular combustion chamber sector test bench has a shell with a cooling air inlet connected to a cooling air inlet metal hose, and a cooling air outlet connected to a cooling air outlet metal hose. Beneficial effects

[0010] 1. This utility model adds cooling shrouds covering the entire wall panels on both sides of the sector-shaped test bench. Air is supplied to the cooling shrouds independently to cool the side panels of the combustion chamber sector-shaped test bench. Serpentine-shaped guide ribs are added inside the cooling shrouds to improve cooling uniformity and enhance the cooling effect.

[0011] 2. The utility model has serpentine-shaped guide ribs inside the cooling cover shell, which has good cooling uniformity and cooling effect.

[0012] 3. This utility model uses independently controlled air to cool the flame tube side panels for testing, and the air volume can be adjusted individually to control the cooling effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the internal structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the external structure of the utility model;

[0015] Figure 3 It is a top view of the utility model;

[0016] Figure 4 It is a schematic diagram of the connection between the cooling hood and the flame tube;

[0017] Figure 5 It is a schematic diagram of the assembly of the cooling cover and the fan-shaped test bench;

[0018] In the figure: 1. Cooling air inlet; 2. Cooling air outlet; 3. Guide rib; 4. Semicircular guide structure; 5. Outlet guide rib; 6. Cooling air inlet metal hose; 7. Cooling air outlet metal hose; 8. Cooling hood as a whole; 9. Side panel of the flame tube of the sector-shaped test bench; 10. Shell. DETAILED DESCRIPTION

[0019] Reference Figure 1-Figure 5 A serpentine cooling structure for a sector-shaped test bench of an annular combustion chamber of a gas turbine comprises: a flame tube side panel 9 of the sector-shaped test bench, on which a cooling cover 8 covering the entire wall panel is fixed;

[0020] This cooling structure adds cooling shrouds covering the entire wall panels on both sides of the sector-shaped test bench. Air is supplied to the cooling shrouds separately to cool the side panels of the combustion chamber sector-shaped test bench. Guide ribs arranged in a serpentine pattern are added inside the cooling shrouds to improve cooling uniformity and enhance cooling effect.

[0021] The cooling cover as a whole comprises a shell having the same shape as the side plate of the flame tube of the sector-shaped test bench. A plurality of guide ribs 3 are fixed in the shell, and an outlet guide rib 5 is fixed on the side of the shell near the cooling gas outlet 2 .

[0022] The serpentine cooling structure for a gas turbine annular combustion chamber sector test bench is characterized in that the guide ribs of odd levels are fixed to the top of the shell, and the guide ribs of even levels are fixed to the outlet guide ribs, and multiple guide ribs are staggered to form a serpentine flow channel.

[0023] In the serpentine cooling structure for a sector-shaped test bench of an annular combustion chamber of a gas turbine, the tip of each guide rib has a semicircular guide structure 4.

[0024] Cooling air enters the cooling chamber through cooling air inlet 1. It is guided through the interior of the cooling chamber by serpentine cooling ribs 3, each with a semicircular guide structure 4 at its tip. After passing through the serpentine flow channel, the cooling air flows through the outlet guide cooling ribs and into the cooling air outlet. The cooling air inlet is connected to the cooling air inlet metal hose 6, and the cooling air outlet is connected to the cooling air outlet metal hose 7.

Claims

1. A serpentine cooling structure for a gas turbine annular combustion chamber sector test bench, comprising: The fan-shaped test bench flame tube side plate is characterized in that: a cooling cover covering the entire wall plate is fixed to the fan-shaped test bench flame tube side plate; The cooling cover as a whole comprises a shell having the same shape as the side plate of the flame tube of the sector-shaped test bench. A plurality of guide ribs are fixed in the shell, and an outlet guide rib is fixed on the side of the shell near the cooling gas outlet.

2. The serpentine cooling structure for a gas turbine annular combustion chamber sector test bench according to claim 1, characterized in that: The guide ribs of odd number stages are fixed on the top of the shell, and the guide ribs of even number stages are fixed on the outlet guide ribs. A plurality of the guide ribs are staggered and distributed to form a serpentine flow channel.

3. The serpentine cooling structure for a gas turbine annular combustion chamber sector test bench according to claim 2, characterized in that: The tip of each guide rib has a semicircular guide structure.

4. The serpentine cooling structure for a gas turbine annular combustion chamber sector test bench according to claim 3, characterized in that: The shell is provided with a cooling air inlet, which is connected to a cooling air inlet metal hose, and the cooling air outlet is connected to a cooling air outlet metal hose.

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