Turbine blade internal cooling structure with particle contaminant capture and separation capability

Abstract

The application discloses a turbine blade internal cooling structure with particle pollutant capturing and separating capability, and belongs to the technical field of blade cooling. The structure comprises a particle capturing section, an internal cooling channel and a leading edge impingement cooling separation cavity which are sequentially communicated. The particle capturing section is provided with a bag-shaped structure to form a flow stagnation area to preliminarily capture particles. The internal cooling channel is provided with an inclined rib with a specific angle to induce the migration of particles to the center of the leading edge of the channel. A nozzle located at the center guides the gathered particles into the leading edge impingement cooling separation cavity with a smooth inner wall to be finally discharged. The method utilizes the above structure to realize the capturing, migration and separation of particles. The application can effectively reduce the particle concentration in the internal cooling channel, reduce deposition, guarantee the cooling efficiency and prolong the service life of the blade.

Description

Technical Field

[0001] This invention belongs to the field of blade cooling technology, specifically relating to an internal cooling structure for turbine blades with particulate pollutant capture and separation capabilities, which is particularly suitable for aero-engine turbine blades and heavy-duty gas turbine blades. Background Technology

[0002] With advancements in aero-engine technology, turbine inlet temperatures have been rising annually, now exceeding the temperature resistance limits of blade metal materials. To protect the blades from high-temperature combustion gases, numerous cooling structures are arranged inside, including serpentine channels, impact holes, film cooling holes, baffles, and baffle columns. These cooling structures interact within the limited space inside the blade, maximizing heat transfer between the cool air and the blade metal to more efficiently absorb heat from the blade and thus protect it.

[0003] With the increasing concentration of particulate pollutants globally, coupled with the increased air intake of new-generation, higher-powered aero engines, the mass of particulate pollutants entering these engines has surged. These particles are first broken down into a larger number of smaller particles by the high-speed rotating compressor blades. Some particles, carried by the drawn-in cool air, enter the turbine blades through the secondary air system. Inside the blades, where various cooling structures are interwoven, particles collide with the walls of these structures at high frequency, leading to low-temperature sintering and the formation of loose, blocky deposits. On one hand, these low-thermal-conductivity deposits covering the cooling structure surfaces weaken heat exchange between the cool air and the structures; on the other hand, due to the confined internal cooling space, even small amounts of deposits can obstruct or block the flow of cool air. This reduces the cooling performance of the cool air, significantly increasing the risk of turbine blade burnout. Furthermore, the complex and confined space inside the blades makes it difficult to remove deposits once they form.

[0004] With the development and application of next-generation gas turbines, higher turbine inlet temperatures and more compact and complex blade internal designs will further exacerbate the problem of particulate matter deposition inside turbine blades. Therefore, a cooling design that can significantly improve the cleanliness of the cool air inside turbine blades urgently needs to be developed. However, existing literature on particulate-cleaning structures suitable for internal cooling channels is relatively limited. Current solutions incorporate a sediment reduction channel with four bag-like structures at the front end of the U-shaped cooling channel inside the turbine blade. While this can capture particulate contaminants and improve cool air cleanliness, it comes at the cost of significantly increased flow losses. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide an internal cooling structure for turbine blades with particulate pollutant capture and separation capabilities, which addresses the shortcomings of the prior art. The structure achieves initial capture of particulate pollutants by arranging a bag-shaped capture section, and then further separates the particulate matter by an impact cooling separation chamber, thereby improving the cleanliness of the cool air and reducing the adverse effects of particulate matter deposition. This invention is used to solve the technical problem that particulate pollutants deposit in the internal cooling channel and cause damage to the aerodynamic characteristics and cooling performance of the cool air.

[0006] The present invention adopts the following technical solution:

[0007] The internal cooling structure of turbine blades, capable of capturing and separating particulate pollutants, includes:

[0008] The particulate capture section is located at the inlet of the internal cooling channel. The particulate capture section has a bag-like structure inside, which is used to capture particulate pollutants by forming a flow stagnation zone.

[0009] The internal cooling channel is equipped with inclined ribs to enhance heat exchange and induce particulate pollutants in the cold air to migrate to specific areas.

[0010] The leading edge impact cooling separation chamber is located in the leading edge region of the turbine blade and is used to protect the leading edge of the blade through impact cooling and provide an outflow path with a low deposition probability for particulate contaminants.

[0011] A nozzle is disposed on the leading edge side of the internal cooling channel to connect the internal cooling channel with the leading edge impact cooling separation chamber; the nozzle has a beveled cut to facilitate the entry of particulate contaminants induced and converged thereby by the inclined ribs into the leading edge impact cooling separation chamber.

[0012] Preferably, the opening direction of the bag-shaped structure forms an angle with the line connecting the center of the cooling channel inlet and outlet. The angle is determined by balancing the particulate matter capture performance, the cold air heat exchange performance, and the cold air flow loss.

[0013] Preferably, the angle between the bag-shaped structure and the line connecting the center of the inlet and outlet of the internal cooling channel is 15° to 60°.

[0014] Preferably, the inclined ribs are arranged on the suction side and pressure side of the internal cooling channel with an inclination angle of 20° to 70°, for inducing the formation of vortex pairs that drive particulate pollutants to converge toward the central region of the leading edge of the channel.

[0015] Preferably, the nozzles are arranged symmetrically along the centerline of the leading edge of the internal cooling channel.

[0016] Preferably, the width of the nozzle is 0.3 to 0.7 times the width of the internal cooling channel.

[0017] Preferably, the nozzle arrangement begins at the first inclined rib on the leading edge side of the internal cooling channel and terminates at the fourth to sixth inclined ribs.

[0018] Preferably, the arrangement of the nozzles is adjusted according to the particle load jet angle at the outlet of the particle capture section.

[0019] Preferably, the inner wall of the leading edge impact cooling separation chamber has a smooth surface and no protruding structure.

[0020] Another technical solution of the present invention is a method for treating cooling airflow and capturing and separating particulate pollutants using an internal cooling structure of turbine blades, comprising the following steps:

[0021] The cooling airflow carrying particulate pollutants is introduced into the particulate capture section.

[0022] In the particle capture section, a flow stagnation zone is formed by the bag-like structure inside, which causes some particulate pollutants to be deposited and captured due to inertial separation and slowed flow velocity.

[0023] Uncaptured particulate contaminants are carried into the internal cooling channel by the cooling airflow;

[0024] In the internal cooling channel, vortex pairs induced by inclined ribs drive the uncaptured particulate pollutants to migrate and converge toward the central region on the leading edge of the internal cooling channel.

[0025] The particulate contaminants that have migrated and converged here are guided into the leading-edge impact cooling separation chamber through the nozzles and their oblique cuts located in the central region.

[0026] In the leading edge impact cooling separation chamber, particulate contaminants are discharged with the cooling airflow in a low-deposition environment on the smooth inner wall, thereby achieving the cleaning of the cooling airflow inside the turbine blade.

[0027] Compared with the prior art, the present invention has at least the following beneficial effects:

[0028] An internal cooling structure for turbine blades, capable of capturing and separating particulate pollutants, achieves highly efficient capture and separation of particulate pollutants in cold air through the coordinated operation of a particle capture section, internal cooling channels, a leading-edge impact cooling separation chamber, and nozzles. The advantages of this structure are: First, the particle capture section, located at the inlet of the cooling channel, intercepts incoming particles immediately. The flow stagnation zone formed by the bag-like structure effectively reduces airflow velocity, promoting particle separation and deposition due to inertia, thus significantly improving initial capture efficiency. Second, the inclined ribs in the internal cooling channel not only enhance heat transfer but also induce vortices to guide particles to specific areas, creating conditions for subsequent separation. Third, the leading-edge impact cooling separation chamber protects the high-heat-load area at the blade's leading edge while providing a low-deposition-probability outflow path, ensuring smooth particle discharge. Finally, the nozzles and their oblique cuts achieve efficient communication between the cooling channel and the separation chamber, further promoting directional particle movement. This scheme has a reasonable overall structural layout and clear functions, improving cold air cleanliness while balancing cooling performance and flow loss control, demonstrating significant practical value and innovation.

[0029] Furthermore, by adjusting the included angle, the balance between the bag-like structure's particle capture efficiency and airflow characteristics can be optimized. A suitable angle ensures optimal inertial separation of particles as they flow through, while avoiding excessive flow resistance and pressure loss. This feature makes the design of the capture section more flexible and targeted, allowing for adaptation to different engine operating conditions and particle characteristics. This maintains the overall aerodynamic performance of the cooling system while ensuring efficient capture, thus improving the applicability and economy of the solution.

[0030] Furthermore, the bag-like structure can create a sufficiently large and stable flow stagnation zone to effectively capture typical harmful particles in the 15-60μm range, while avoiding severe flow separation and increased resistance due to excessively large angles, or a significant decrease in capture efficiency due to excessively small angles. It provides a clear and reliable design basis for achieving the optimal balance between particulate matter capture performance, cold air heat exchange performance, and cold air flow losses, enabling the product to achieve optimized performance and energy consumption.

[0031] Furthermore, simultaneously arranging inclined ribs on both the suction and pressure sides enables the formation of symmetrical and controllable vortex pairs within the channel. An inclination angle range of 20°–70° is crucial for generating effective secondary flow and driving particles towards the target area (center of the leading edge). Specific vortex patterns effectively "sweep" particles from the channel, preventing their deposition at the rib roots or wall corners, while guiding them towards the nozzle opening. This significantly improves particle migration efficiency and the capture rate in subsequent separation steps, representing a core approach to solving particle deposition problems from a flow field organization perspective.

[0032] Furthermore, the symmetrical arrangement and the particle flow field induced by the inclined ribs, converging towards the centerline of the forward edge, are efficiently matched. This arrangement ensures that particles transported to the central region by the vortex pair can be effectively received by the nozzles, avoiding particle escape or impact and deposition on the wall caused by nozzle offset. It maximizes the efficiency of particles entering the separation chamber through the nozzles and is a key design feature to ensure the coordinated operation of the entire system.

[0033] Furthermore, a width that is too small (<0.3) will limit the passage capacity of particles, potentially causing some particles to accumulate and clog the nozzle; a width that is too large (>0.7) will excessively divert the cooling airflow, potentially affecting the cooling effect and flow field stability of the impact cooling separation chamber, and may also reduce the nozzle outlet velocity, weakening the particle carrying capacity. A width of 0.3-0.7 times achieves the optimal balance between efficient particle separation and maintaining the necessary cooling airflow, ensuring optimal overall system performance.

[0034] Furthermore, the axial arrangement range of the nozzles is defined, covering the main area where particles, after rebounding from the trailing edge of the capture section, migrate towards the forward edge under the influence of eddies and begin to converge. Placing the nozzle inlet within this area enables "early interception" of particles, separating them before they have time to diffuse or deposit in the subsequent, longer channels. This significantly reduces the risk of particle deposition in the main body of the internal cooling channels, improving the timeliness and effectiveness of separation.

[0035] Furthermore, the particle load jet angle at the capture section outlet is affected by the incoming flow conditions and particle characteristics. By adapting the nozzle position according to this key parameter, it can be ensured that high particle separation efficiency can be maintained stably by changing the nozzle position regardless of the operating conditions, thereby enhancing the robustness and reliability of the entire system under different working conditions.

[0036] Furthermore, the smooth inner wall of the separation chamber minimizes the probability of particle collisions and deposition efficiency. The smooth wall surface ensures smooth flow and avoids the formation of new deposition points, making the separation chamber a truly efficient particle transport channel rather than a particle collector, thus guaranteeing the final separation effect.

[0037] In summary, this invention effectively solves the problem of particle deposition in the internal cooling channels of turbine blades by arranging a capture section with a bag-like structure and an impact cooling separation chamber on the internal cooling channel, and significantly reduces the concentration of particulate pollutants in the internal cooling channel.

[0038] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the following description of the relative embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0040] Figure 1 This is a schematic diagram of the structure of the present invention.

[0041] Figure 2 This is a top view of the present invention.

[0042] Figure 3 This represents the migration trajectory of particulate matter in cooling structures with or without particulate capture and separation functions.

[0043] Figure 4 This represents the deposition distribution of particulate matter in cooling structures with or without particulate capture and separation functions.

[0044] Figure 5 This represents the percentage of particulate matter mass in different parts of the cooling structure.

[0045] The components include: 1. Particle capture section; 2. Bag-like structure; 3. Nozzle; 4. Leading edge impact cooling separation chamber; 5. Angled cut; 6. Turbine blade; 7. Inclined rib; 8. Internal cooling channel. Detailed Implementation

[0046] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "one side," "one end," and "one side," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0048] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0049] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0050] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0051] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0052] The accompanying drawings illustrate various structural schematic diagrams according to embodiments disclosed in this invention. These drawings are not to scale, and some details have been enlarged for clarity, and some details may have been omitted. The shapes of the various regions and layers shown in the drawings, as well as their relative sizes and positional relationships, are merely exemplary and may deviate from reality due to manufacturing tolerances or technical limitations. Furthermore, those skilled in the art can design regions / layers with different shapes, sizes, and relative positions as needed.

[0053] This invention provides an internal cooling structure for turbine blades with particulate contaminant capture and separation capabilities. It comprises a particle capture section with a bag-like structure, ribbed cooling channels within the turbine blade, and a leading-edge impact cooling separation chamber. The ribbed cooling channels and the separation chamber are connected via nozzles with oblique cuts. After the particulate load enters the internal cooling structure, some particles are separated by inertia during the flow change and enter the bag-like structure, where they are deposited and captured. Other particles form a high-speed jet at the throat of the capture section, impacting the trailing edge of the capture section. Particles that rebound then migrate towards the leading edge of the ribbed channels and converge towards the central region of the leading edge under the influence of induced vortices from the inclined ribs, before entering the leading-edge impact cooling separation chamber through the nozzles. Within the smooth separation chamber, particle deposition efficiency decreases, and the particles ultimately exit the blade with the cool airflow. This invention significantly reduces the particulate concentration in the internal ribbed cooling channels.

[0054] Please see Figure 1 The present invention discloses an internal cooling structure for turbine blades with particulate pollutant capture and separation capabilities, comprising a particulate capture section 1 composed of a bag-shaped structure 2, and an internal cooling channel 8 with inclined ribs 7 inside the turbine blade 6 and a leading edge impact cooling separation chamber 4. The impact cooling separation chamber 4 and the internal cooling channel 8 are connected by a nozzle 3 with an inclined cut 5. The particulate capture section 1 of the bag-shaped structure 2 is arranged at the inlet front end of the internal cooling channel 8, and the leading edge impact cooling separation chamber 4 is arranged in the leading edge region of the turbine blade. By means of the impact cooling effect formed by the cold air jet, particulate matter separation is achieved while protecting the leading edge region of the blade with the highest heat load.

[0055] The bag-shaped structure 2 in the particle capture section 1 forms a flow stagnation zone. The flow rate of cold air slows down in this zone, and heat gradually accumulates, forming a high-temperature and low-speed environment, which is more conducive to the capture of particulate matter.

[0056] Preferably, the angle between the bag-shaped structure 2 and the line connecting the center of the cooling channel inlet and outlet is 15°-60°, and the specific value is determined by balancing the particulate matter capture performance, the cold air heat exchange performance and the cold air flow loss.

[0057] A nozzle 3 is arranged on the leading edge of the cooling channel 8 to receive particles that bounce off the trailing edge of the capture section 1.

[0058] The oblique cut 5 helps the particles to separate from the cold air and enter the leading edge impact cooling separation chamber 4; even if the particles hit the oblique cut 5, they will continue to bounce and enter the impact cooling separation chamber 4.

[0059] Specifically, the nozzle 3 is arranged from the first inclined rib 7 to the fourth to sixth ribs. Its arrangement position is adapted and adjusted according to the particle load jet angle at the outlet of the capture section. Under the premise of limited separation cold gas volume, the particles can be separated as early as possible before they form deposits in the internal cooling channel 8.

[0060] Inclined ribs 7 are arranged on both the suction side and the pressure side of the internal cooling channel 8, with an inclination angle of 20°-70°. The vortex pairs induced by the inclined ribs 7 will drive the particles to converge towards the middle position of the two rows of inclined ribs on the front edge of the cooling channel 8.

[0061] The nozzles 3 are symmetrically arranged along the center line of the front edge of the cooling channel 8. The width of the nozzles 3 is 0.3-0.7 times the width of the channel, so as to successfully separate the particles that converge from the vortex pair to the center area of ​​the front edge of the channel.

[0062] Preferably, the inner wall of the blade leading edge impact cooling separation chamber 4 is as smooth as possible and without any protruding structures to reduce the probability of particles colliding with the wall surface and ensure that particles can flow out of the blade smoothly.

[0063] The present invention achieves particulate matter capture and separation through a capture section and a separation chamber as follows: Small-diameter particles broken up by the high-speed rotating compressor blades first undergo a large-angle deflection in the particle capture section 1 before entering the internal cooling channel 8 of the turbine blade 6 via the secondary air system. Some particles are separated from the cold air during the deflection process and enter the bag-shaped structure 2, where they are deposited and captured under the high-temperature, low-speed environment. The remaining particles collide with the trailing edge of the capture section 1, forming a high-speed jet that impacts the trailing edge wall. Particles that rebound migrate towards the leading edge of the cooling channel 8 and converge towards the central region of the leading edge under the influence of vortices induced by the inclined ribs 7. The nozzles 3 arranged in this region can smoothly receive these particles, allowing them to enter the leading edge impact cooling separation chamber 4. The oblique cuts 5 on the nozzles 3 further promote the entry of particles into the separation chamber 4. These particles ultimately exit the turbine blade 6 with the cold air flow. This structure significantly improves the cleanliness of the cold air in the internal cooling channel 8.

[0064] Please see Figure 2 The leading edge of the turbine blade 6, which faces the high-temperature gas, is subjected to a high heat load. The impact cooling separation chamber 4 arranged here protects the leading edge of the blade through impact cooling. The nozzle 3 with the oblique cut 5 is located in the central area of ​​the leading edge side of the internal cooling channel 8, connecting the impact cooling separation chamber 4 and the internal cooling channel 8.

[0065] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0066] Please see Figure 3 The diagram illustrates the migration trajectory of particulate matter in cooling structures with and without particle capture and separation functions. In cooling structures with particle capture and separation functions, particles first enter the capture section with the cold air. During a large-angle deflection, due to inertia, they are separated from the cold air and enter a bag-shaped region, where a large number of particles rebound and a significant portion deposit. The remaining particles flow out of the throat of the capture section with the high-speed load flow and impact the trailing edge of the capture section, rebounding and migrating to the area between the 1st to 5th ribs on the leading edge of the internal cooling channel. The particles enter the leading edge of the cooling separation chamber through the nozzle, and a large number of particles rebound after impacting the oblique cut of the nozzle, still successfully entering the separation chamber and finally exiting the blade interior with the cold air flow. The particle concentration in the internal cooling channel is thus significantly reduced. In cooling channels without particle capture and separation functions, particles enter the internal cooling channel directly without obstruction. Subsequently, under the action of vortex pairs induced by the inclined ribs, they collide with the inner wall of the cooling channel at high frequency, easily forming deposits.

[0067] Please see Figure 4 The graph shows the deposition distribution of particulate matter in cooling structures with and without particle capture and separation functions. In cooling structures with particle capture and separation functions, the most significant deposition occurs in the bag-shaped structure, demonstrating a significant particle capture effect in the capture section. A small amount of particles are deposited on the leading edge surface of the front impact cooling separation chamber, while only a small amount of deposition is visible on the internal cooling channels. In cooling channels without particle capture and separation functions, more particles are deposited in the internal ribbed cooling channels, with significant deposition occurring in the angle region between the ribs and the wall.

[0068] Please see Figure 5Figure 1 shows the percentage of particulate matter mass in different parts of the cooling structure. In the cooling structure with particle capture and separation functions, 34.2% of the particles are deposited in the bag-shaped capture section, 37.9% of the particles are separated by the leading edge impact cooling separation chamber, and only 27.9% of the particles are left to enter the internal cooling channel. In the cooling channel without particle capture and separation functions, most of the particles enter the ribbed cooling channel directly without obstruction.

[0069] In summary, this invention provides an internal cooling structure for turbine blades capable of capturing and separating particulate contaminants. By arranging a capture section with a bag-like structure and a leading-edge impact cooling separation chamber, it captures and separates particulate contaminants in the cooled air, significantly improving the cleanliness of the cooled air particles entering the internal cooling channel. This invention has a simple structure, requires no special processing, and can be achieved using existing turbine blade cooling structure manufacturing processes. In use, a balance can be struck between cooled air consumption, cooled air cleanliness requirements, and blade cooling requirements, by selecting an appropriate bag-like structure deflection angle and nozzle size and position.

[0070] The above content is only for illustrating the technical concept of the present invention and should not be construed as limiting the scope of protection of the present invention. Any modifications made to the technical solution based on the technical concept proposed in this invention shall fall within the scope of protection of the claims of this invention.

Claims

1. An internal cooling structure for turbine blades with particulate pollutant capture and separation capabilities, characterized in that, include: The particulate capture section (1) is located at the inlet front of the internal cooling channel (8), and the particulate capture section (1) is provided with a bag-shaped structure (2) for capturing particulate pollutants by forming a flow stagnation zone; An internal cooling channel (8) is provided with inclined ribs (7) to enhance heat exchange and induce particulate pollutants in the cold air to migrate to a specific area. The leading edge impact cooling separation chamber (4) is arranged in the leading edge region of the turbine blade (6) to protect the leading edge of the blade by impact cooling and to provide an outflow path with low deposition probability for particulate pollutants; The nozzle (3) is disposed on the leading edge side of the internal cooling channel (8) to connect the internal cooling channel (8) with the leading edge impact cooling separation chamber (4); the nozzle (3) is provided with a bevel (5) to promote the entry of particulate pollutants induced to converge here by the inclined rib (7) into the leading edge impact cooling separation chamber (4).

2. The internal cooling structure of the turbine blade with particulate pollutant capture and separation capability according to claim 1, characterized in that, The opening direction of the bag-shaped structure (2) forms an angle with the line connecting the center of the inlet and outlet of the cooling channel. The angle is determined by balancing the particulate matter capture performance, the cold air heat exchange performance and the cold air flow loss.

3. The internal cooling structure of the turbine blade with particulate pollutant capture and separation capability according to claim 2, characterized in that, The angle between the bag-shaped structure (2) and the center line connecting the inlet and outlet of the internal cooling channel (8) is 15° to 60°.

4. The internal cooling structure of the turbine blade with particulate pollutant capture and separation capability according to claim 1, characterized in that, The inclined ribs (7) are arranged on the suction side and pressure side of the internal cooling channel (8) with an inclination angle of 20° to 70°, and are used to induce the formation of vortex pairs that drive particulate pollutants to converge toward the central region of the leading edge of the channel.

5. The internal cooling structure of turbine blades with particulate pollutant capture and separation capability according to claim 1 or 4, characterized in that, The nozzles (3) are arranged symmetrically along the centerline of the front edge of the internal cooling channel (8).

6. The internal cooling structure of the turbine blade with particulate pollutant capture and separation capability according to claim 5, characterized in that, The width of the nozzle (3) is 0.3 to 0.7 times the width of the internal cooling channel (8).

7. The internal cooling structure of the turbine blade with particulate pollutant capture and separation capability according to claim 1, characterized in that, The nozzle (3) is arranged starting at the first inclined rib (7) on the front edge side of the internal cooling channel (8) and ending at the fourth to sixth inclined ribs (7).

8. The internal cooling structure of the turbine blade with particulate pollutant capture and separation capability according to claim 7, characterized in that, The arrangement of the nozzle (3) is adjusted according to the particle load jet angle at the outlet of the particle capture section (1).

9. The internal cooling structure of the turbine blade with particulate pollutant capture and separation capability according to claim 1, characterized in that, The inner wall of the leading edge impact cooling separation chamber (4) is a smooth surface and has no protruding structure.

10. A method for treating cold air and capturing and separating particulate pollutants using an internal cooling structure for turbine blades as described in any one of claims 1-9, characterized in that, Includes the following steps: The cooling airflow carrying particulate pollutants is introduced into the particulate capture section (1); In the particle capture section (1), a flow stagnation zone is formed by the bag-like structure (2) set inside it, so that a portion of particulate pollutants are deposited and captured due to inertial separation and slowed flow rate; Uncaptured particulate pollutants are carried into the internal cooling channel by the cooling airflow (8); In the internal cooling channel (8), the vortex pairs induced by the inclined ribs (7) drive the uncaptured particulate pollutants to migrate and converge toward the central region on the leading edge side of the internal cooling channel (8); The particulate contaminants that have migrated and converged here are introduced into the leading edge impact cooling separation chamber (4) through the nozzle (3) and its oblique cut (5) located in the central region. In the leading edge impact cooling separation chamber (4), particulate contaminants are discharged with the cooling airflow in a low deposition environment on the smooth inner wall, thereby achieving the cleaning of the cooling airflow inside the turbine blade.

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