Efficient anti-icing gas-liquid separation blade with bionic channels and gas film holes

Abstract

The invention discloses an efficient anti-icing gas-liquid separation blade with bionic channels and gas film holes, and relates to the technical field of gas turbine gas inlet systems. The inlet drainage section, the arc-shaped transition section and the outlet flow guide section are manufactured into a whole, a first arc hook is arranged in the middle of the outer side wall of the arc-shaped transition section, the arc-shaped transition section is hollow, hot air is fed into the arc-shaped transition section, a bionic hot air cavity is embedded into the inlet drainage section, honeycomb filling structures and linear filling structures are arranged in the bionic hot air cavity in an array mode, and nozzles are formed in the surfaces of the two sides in an array mode. Air film holes are formed in the surfaces of the two sides of the inlet drainage section in an array mode, and the air film holes pressurize and accelerate exhausted hot air and are the same as flowing cold air in flow direction. The bionic hot air cavities and the air supply cavities are formed in the inlet drainage sections and the arc transition sections of the blades correspondingly, meanwhile, the air film holes are formed in the surfaces of the inlet drainage sections, two anti-icing structures are formed in a hot air feeding mode, the anti-icing effect and the deicing effect are improved, and meanwhile the heat loss of a follow-up combustion chamber can be reduced.

Description

Technical Field

[0001] The invention relates to the technical field of gas turbine air intake systems, in particular to a high-efficiency anti-icing gas-liquid separation blade with a bionic channel and air film holes. Background Art

[0002] The air intake system plays a crucial role in the operation of a marine gas turbine, especially in cold winter weather, when the air intake system is exposed to extremely harsh conditions. Cold air laden with liquid droplets flows through the intake system, then through the compressor, and finally into the combustion chamber. Due to the low temperatures in winter, liquid droplets easily freeze, causing severe corrosion to the gas-liquid separation blades of the gas turbine. Traditional gas turbine gas-liquid separation blades, also known as inertia-stage blades, operate as follows: air laden with liquid droplets passes through the channel formed by the inertia-stage blades. The droplets impact the walls of the inertia-stage blades and are blocked, thereby reducing the liquid droplet content in the air and further increasing the air dryness. The droplets then gather in the hydrophobic grooves of the inertia-stage blades, falling due to gravity before being collected.

[0003] Currently, there are numerous models of inertia-stage blades, but traditional inertia-stage blades only have a limited effect on collecting droplets during operation. When a ship sails in relatively cold conditions, especially in the far north, droplets flowing through the blades can form ice on their surfaces, significantly reducing their efficiency. Existing technologies have made minimal improvements to the anti-icing performance of traditional inertia-stage blades, and those improvements that have been made are limited to simple modifications to the blades, such as embedding heaters within them to increase their temperature through heat conduction, thereby achieving a limited anti-icing effect.

[0004] In summary, the anti-icing efficiency of traditional inertia-stage blades is not high. Due to the presence of the heating plate, cold air carrying droplets continuously washes the surface of the inertia-stage blades, and the heating plate continuously transfers heat to the blades through heat conduction. Moreover, the heating plate only heats the blades and has little impact on the air. The cold air will enter structures such as the compressor combustion chamber, which increases the structural strength requirements of the compressor and also increases the heat loss of the subsequent combustion chamber. At the same time, the droplet separation efficiency is not high. Therefore, the optimization of traditional inertia-stage blades needs to be solved urgently. Summary of the Invention

[0005] In order to address the shortcomings of the background technology, the present invention provides a high-efficiency anti-icing gas-liquid separation blade with bionic channels and air film holes, which respectively arrange a bionic hot air cavity and an air supply cavity in the inlet drainage section and the arc-shaped transition section of the blade. At the same time, air film holes are processed on the surface of the inlet drainage section, and two anti-icing structures are formed by the introduction of hot air, which improves the anti-icing effect and helps to reduce the heat loss of the subsequent combustion chamber.

[0006] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a high-efficiency anti-icing gas-liquid separation blade with a bionic channel and an air film hole, comprising an inlet guide section, an arc-shaped transition section and an outlet guide section which are sequentially connected and made into an integral part of the blade body, the inlet guide section and the outlet guide section are both straight sections and are located on the same plane, a first arc hook is integrally provided on the outer side wall of the arc-shaped transition section near the middle position, the opening side of the first arc hook faces the incoming flow direction and its internal space forms a hydrophobic groove, the interior of the arc-shaped transition section is hollow and hot air is fed in, and a bionic hot air is embedded in the interior of the inlet guide section The cavity is connected with the arc-shaped transition section. The bionic hot air cavity is a hollow plate structure and a plurality of honeycomb filling structures and a plurality of straight filling structures are arranged in an array inside the cavity. A straight filling structure is arranged at the center of every four honeycomb filling structures distributed in a square. A plurality of nozzles are arranged in an array on the surfaces of both sides of the bionic hot air cavity. A plurality of air film holes are arranged in an array on the surfaces of both sides of the inlet drainage section at positions corresponding to the nozzles. The air film holes adopt a scaling structure with thick ends and thin middle to pressurize and increase the speed of the discharged hot air. The outlet section of the air film hole adopts an arc configuration to make the discharged hot air have the same flow direction as the cold air flowing through.

[0007] Furthermore, a cylindrical convex rib is integrally provided at the outer end of the outlet guide section, and the inner end of the outlet guide section extends toward the inlet guide section and forms a second water trap between the inner wall of the arc-shaped transition section.

[0008] Furthermore, a wave-shaped protrusion is integrally provided on the surface of one side of the outer wall of the arc-shaped transition section adjacent to the inlet drainage section.

[0009] Furthermore, a hydrophobic coating is evenly sprayed on the surface of the blade body.

[0010] Furthermore, the first arc hook and the end of the inlet drainage section are chamfered respectively.

[0011] Furthermore, the inner wall surfaces on both sides of the arc-shaped transition section are embedded with fixed support frames.

[0012] Furthermore, the honeycomb filling structure and the linear filling structure are integrated with the bionic hot air cavity through 3D printing.

[0013] Compared with the prior art, the present invention has the following advantages: an air supply cavity is provided within the arcuate transition section in the middle of the blade to introduce hot air, a first arc hook is provided in the middle of the outer wall of the arcuate transition section to intercept liquid droplets, a bionic hot air cavity is provided within the inlet guide section at the front end of the blade, and air film holes are machined on the surface of the inlet guide section, thereby forming two anti-icing structures in the front half of the blade, where ice formation is most likely to form. The bionic hot air cavity uses an array of staggered honeycomb filling structures and linear filling structures to help slow the loss of hot air. The air film holes use a special arc configuration to pressurize and accelerate the exhaust hot air, and spray and mix it along the flow direction of the cold air. This method of directly spraying hot air into the incoming cold air improves the anti-icing effect, not only drying entrained droplets but also preheating the cold air, preventing ice from corroding the blade, extending its service life, and helping to reduce heat loss in the subsequent combustion chamber. A second water trap is provided on the inside of the outlet guide section at the rear end of the blade to intercept liquid droplets, and cylindrical ribs are provided on the outside to assist in intercepting terminal droplets and improving the flow performance of the discharged air. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall structure of the high-efficiency anti-icing gas-liquid separation blade of the present invention;

[0015] Figure 2 yes Figure 1 A magnified schematic diagram of the air film hole in part A;

[0016] Figure 3 It is a schematic diagram of the surface structure of the bionic hot air cavity in the present invention;

[0017] Figure 4 Schematic diagram of the internal structure of the bionic hot air cavity in the present invention;

[0018] Figure 5 It is a gas-liquid separation principle diagram of the present invention.

[0019] In the figure: 1. hydrophobic groove; 2. first arc hook; 3. arc-shaped transition section; 4. hydrophobic coating; 5. corrugated protrusion; 6. support frame; 7. air film hole; 8. inlet diversion section; 9. bionic hot air cavity; 10. honeycomb filling structure; 11. linear filling structure; 12. nozzle; 13. second water retention hook; 14. outlet diversion section. DETAILED DESCRIPTION

[0020] The technical solutions of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0021] like Figures 1 to 5 As shown, a high-efficiency anti-icing gas-liquid separation blade with a bionic channel and an air film hole includes a hydrophobic groove 1, a first arc hook 2, an arc-shaped transition section 3, a hydrophobic coating 4, a corrugated protrusion 5, a support frame 6, an air film hole 7, an inlet diversion section 8, a bionic hot air cavity 9, a honeycomb filling structure 10, a linear filling structure 11, a nozzle 12, a second water storage hook 13 and an outlet diversion section 14.

[0022] Combine Figure 1 As shown, the inlet guide section 8 and the outlet guide section 14 are both straight sections and are located on the same plane. The arc-shaped transition section 3 is integrally connected between the inlet guide section 8 and the outlet guide section 14 to form a blade body, and the surface of the blade body is evenly sprayed with a hydrophobic coating 4. Among them, a first arc hook 2 is integrally provided on the outer wall of the arc-shaped transition section 3 near the middle position, the opening side of the first arc hook 2 faces the incoming flow direction and its internal space forms a hydrophobic groove 1, the end of the first arc hook 2 is chamfered, and a wave-shaped protrusion 5 is integrally provided on the surface of the outer wall of the arc-shaped transition section 3 near the inlet diversion section 8. The interior of the arc-shaped transition section 3 is hollow and serves as an air supply cavity. An air inlet is provided on the side of the arc-shaped transition section 3 near the outlet diversion section 14 to connect to an external hot air supply device for the introduction of hot air. In order to avoid the air supply cavity reducing the rigidity of the arc-shaped transition section 3, a fixed support frame 6 can be embedded in the wall surface on both sides of the air supply cavity; a cylindrical rib is integrally provided on the outer end of the outlet diversion section 14, and the inner end of the outlet diversion section 14 extends toward the inlet diversion section 8 and forms a second water retention hook 13 between the inner wall of the arc-shaped transition section 3; the end of the inlet diversion section 8 is chamfered, the interior of the inlet diversion section 8 is hollow and connected to the air supply cavity for loading the bionic hot air cavity 9.

[0023] Combine Figures 3 and 4 As shown, the bionic hot air cavity 9 is a hollow plate-like structure embedded in the inlet drainage section 8 and connected to the air supply cavity. A number of honeycomb filling structures 10 and a number of straight filling structures 11 are arranged in an array inside the bionic hot air cavity 9. The honeycomb filling structure 10 and the straight filling structure 11 are both arranged along the width direction of the bionic hot air cavity 9. A straight filling structure 11 is arranged at the center of every four honeycomb filling structures 10 distributed in a square, and the straight direction of the straight filling structure 11 is the same as the straight segment direction of the inlet drainage section 8. There is a gap between the straight filling structure 11 and the four surrounding honeycomb filling structures 10. The honeycomb filling structure 10 and the straight filling structure 11 are integrated with the bionic hot air cavity 9 by 3D printing, and a number of nozzles 12 are opened in an array on the surfaces of both sides of the bionic hot air cavity 9, and the nozzles 12 are located in the middle of adjacent honeycomb filling structures 10.

[0024] Combine Figures 1 and 2As shown, a number of air film holes 7 are arranged in an array on the surfaces of both sides of the inlet drainage section 8. The inlet position of the air film hole 7 should correspond one-to-one to the nozzle 12. The air film hole 7 adopts a scaling structure with thick ends and thin middle to pressurize and increase the speed of the discharged hot air. The outlet section of the air film hole 7 adopts an arc configuration to make the discharged hot air and cold air flow in the same direction.

[0025] Combine Figure 5 As shown, the mechanism of action of the present invention is as follows:

[0026] During use, multiple high-efficiency, anti-icing gas-liquid separation blades of the present invention are arranged side by side at equal intervals to form a marine gas-liquid separator. A flow channel is formed between each pair of adjacent blade bodies. The area between adjacent inlet guide sections 8 serves as the air inlet, and the area between adjacent outlet guide sections 14 serves as the air outlet. Cold air carrying liquid droplets flows through the gas-liquid separator via the air inlet, the flow channel, and the air outlet. The air supply cavity within the arcuate transition section 3 is connected to an external hot air supply device to introduce hot air. The hot air is then fed along the air supply cavity into the bionic hot air cavity 9 and ejected through the air film holes 7 provided on both sides of the inlet guide section 8.

[0027] The first anti-icing channel is formed by the bionic hot air cavity 9 inside the inlet guide section 8 of two adjacent blade bodies and the air film holes 7 on the surface. The hot air ejected through the air film holes 7 merges with the incoming cold air, thereby drying the droplets in the cold air and preheating the cold air, making the inlet guide section 8 area have an anti-icing effect. Among them, the air film holes 7 adopt a specific nozzle form, abandoning the traditional straight line configuration and adopting an arc configuration. By fixing the inclination angle of the outlet, the direction of the ejected hot air is aligned with the flow direction of the cold air, so that the hot air is pressurized and accelerated before being efficiently mixed with the cold air. The honeycomb filling structure 10 and the linear filling structure 11 arranged in an array inside the bionic hot air cavity 9 ensure that the hot air circulates along a specified route, and the generation of fixed vortices in the area near the filling structure helps to slow the loss of hot air.

[0028] The second anti-icing channel is formed by the air supply cavity inside the arcuate transition section 3 of two adjacent blade bodies and the corrugated protrusions 5 on the surface. The mixed air passing through the first anti-icing channel acts on the corrugated protrusions 5. The corrugated protrusions 5 have hydrophobic properties and cause the mixed air to form turbulent flow, which better affects the rear flow channel. This allows the mixed air to flow to both the inside and outside of the first arc hook 2, avoiding excessive concentration on the inside of the first arc hook 2 to relieve the pressure of the hydrophobic groove 1. The hot air entering the air supply cavity also heats the arcuate transition section 3, making the arcuate transition section 3 area have an anti-icing effect. The hydrophobic groove 1 can store some droplets in the mixed air, which are discharged under their own weight to avoid flowing downward.

[0029] Since most of the droplets in the air have been separated and filtered out after flowing through the first two sections of the gas-liquid separator, only two anti-icing structures need to be installed in the inlet guide section 8 and the arc-shaped transition section 3. When the air flows to the second half, the remaining droplets will gather in the second water trap 13 provided on the inner end of the outlet guide section 14. Similarly, the droplets will be discharged under their own weight and prevented from flowing downward. After being dried by hot air, the outlet guide section 14 is basically difficult to form ice, and no additional anti-icing design is required. The discharged air, under the action of the cylindrical ribs provided on the outer ends of the two adjacent outlet guide sections 14, helps the air discharged from the outlet area to gather in the middle, avoiding mutual disturbance of the air discharged from the two adjacent flow channels. At the same time, because the cylindrical ribs protrude from the wall of the outlet guide section 14, they can also serve as a water retaining structure at the end, further blocking the residual droplets from flowing downward along the cylindrical ribs for discharge.

[0030] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other configurations without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations coming within the meaning and range of equivalents of the claims are intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0031] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A high-efficiency anti-icing gas-liquid separation blade with a bionic channel and an air film hole, comprising an inlet guide section (8), an arc-shaped transition section (3) and an outlet guide section (14) connected in sequence and made into an integral blade body, wherein the inlet guide section (8) and the outlet guide section (14) are both straight sections and are located on the same plane, a first arc hook (2) is integrally provided near the middle position of the outer side wall of the arc-shaped transition section (3), the opening side of the first arc hook (2) faces the incoming flow direction and the internal space thereof forms a hydrophobic groove (1), and is characterized in that: The arc-shaped transition section (3) is hollow inside and hot air is sent in. The inlet drainage section (8) is embedded with a bionic hot air cavity (9) and is connected to the arc-shaped transition section (3). The bionic hot air cavity (9) is a hollow plate structure and a plurality of honeycomb filling structures (10) and a plurality of linear filling structures (11) are arranged in an array inside the bionic hot air cavity (9). One linear filling structure (11) is arranged at the center of every four honeycomb filling structures (10) distributed in a square. A plurality of nozzles (12) are arranged in an array on both sides of the bionic hot air cavity (9). A plurality of air film holes (7) are arranged in an array at positions corresponding to the nozzles (12) on both sides of the inlet drainage section (8). The air film holes (7) use a scaling structure with thick ends and thin middle to pressurize and speed up the discharged hot air. The outlet section of the air film hole (7) adopts an arc configuration so that the discharged hot air has the same flow direction as the cold air flowing through.

2. The high-efficiency anti-icing gas-liquid separation blade with bionic channels and air film holes according to claim 1, characterized in that: The outer end of the outlet guide section (14) is integrally provided with a cylindrical convex rib, and the inner end of the outlet guide section (14) extends toward the inlet guide section (8) and forms a second water retention hook (13) between the inner side wall of the arc-shaped transition section (3).

3. The high-efficiency anti-icing gas-liquid separation blade with bionic channels and air film holes according to claim 1 or 2, characterized in that: A wave-shaped protrusion (5) is integrally provided on the surface of one side of the outer wall of the arc-shaped transition section (3) adjacent to the inlet drainage section (8).

4. The high-efficiency anti-icing gas-liquid separation blade with bionic channels and air film holes according to claim 3, characterized in that: The surface of the blade body is evenly sprayed with a hydrophobic coating (4).

5. The high-efficiency anti-icing gas-liquid separation blade with bionic channels and air film holes according to claim 1, characterized in that: The ends of the first arc hook (2) and the inlet drainage section (8) are respectively chamfered.

6. The high-efficiency anti-icing gas-liquid separation blade with bionic channels and air film holes according to claim 1, characterized in that: The inner wall surfaces on both sides of the arc-shaped transition section (3) are embedded with a fixed support frame (6).

7. The high-efficiency anti-icing gas-liquid separation blade with bionic channels and air film holes according to claim 1, characterized in that: The honeycomb filling structure (10), the linear filling structure (11) and the bionic hot air cavity (9) are integrated by 3D printing.

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