Inertia-level blade capable of automatically changing size of water conveying groove and thickness of blade according to airflow water content

Abstract

The invention belongs to the technical field of inertia-level blades in air inlet filtering devices, and particularly relates to an inertia-level blade capable of automatically changing the size of a water conveying groove and the thickness of the blade according to the water content of airflow. The thickness of the blades and the size of the water conveying groove can be automatically changed according to the water content in airflow, the liquid drop capturing and conveying capacity of the inertia-level blades is adjusted by changing the distance between the inertia-level blades and the size of the water conveying groove, and the problem that the water conveying groove is blocked is solved; and the high-efficiency gas-water separation efficiency of the inertia-level blade under the condition of different inlet gas water contents is ensured. Meanwhile, through the combined action of the hydrophilic coatings and the hydrophobic coatings which are arranged in a staggered mode, small liquid drops are gathered into large liquid drops, the capturing and conveying efficiency of the liquid particles is improved, and the secondary splashing phenomenon is prevented. The device has the advantages of simple structure, convenience in processing, high efficiency, reliability, low cost and the like.

Description

Technical Field

[0001] The invention belongs to the technical field of inertia stage blades in an air intake filter device, and in particular relates to an inertia stage blade which automatically changes the size of a water delivery trough and the thickness of a blade according to the water content of an air flow. Background Art

[0002] The inertia stage blade is a main component installed in the filter device of the gas turbine intake system. It is used to filter out solid and liquid particles, salt spray aerosol and other impurities in the air inhaled by the gas turbine. The main purification object is the salt spray liquid particles floating in the marine environment. As ships sail to the open sea and deep sea, the operating environment of marine gas turbines has become more severe. Faced with extreme sea conditions such as huge waves and heavy rain, a large amount of salt spray liquid particles will be mixed in the gas turbine intake, and the water purification pressure of the inertia stage blade will increase sharply.

[0003] The inertia stage blades use the deflected water trough structure to capture and collect liquid particles in the incoming air, so as to improve the intake quality of the gas turbine. However, extremely severe sea conditions will cause the number of liquid particles in the incoming air to increase sharply, and the large number of droplets collected by the inertia stage blades in a short period of time will quickly fill the water trough. This will cause the water trough to be blocked by liquid and unable to be discharged in a short period of time, greatly reducing the ability of the water trough to capture and transport droplets. With the sharp increase in the number of liquid particles in the incoming air, on the one hand, it will make it more difficult for the inertia stage blades to transport droplet particles. The droplets spread on the inner wall of the water trough to form a liquid film and cannot fall and be collected by their own gravity, reducing the purification efficiency of the inertia stage blades. On the other hand, there will be a "secondary splash" phenomenon of droplets. The droplets are affected by the high-speed airflow on the outer wall of the water trough, blown away from the surface of the inertia stage blades, and mixed with the incoming air again, greatly reducing the intake quality of the gas turbine and threatening the stable and efficient operation of the gas turbine.

[0004] From the design principle of the inertia stage blades, it can be seen that if the air intake filter device uses an inertia stage blade with a larger water trough, the larger water trough can solve the problem of a large number of droplet blockages, but it will produce a large aerodynamic resistance loss, which cannot meet the requirements of the daily operation of the gas turbine for the total intake pressure loss. If the air intake filter device uses an inertia stage blade with a normal size water trough, in short-term extremely severe sea conditions such as heavy rain and huge waves, the blockage of the water trough will cause the gas turbine intake quality to fail to meet the requirements. At the same time, if the air intake filter device uses an inertia stage blade with a larger thickness and higher separation efficiency, when the installation position of the blade is fixed, the thick blade reduces the blade spacing, ensuring that the inertia stage blade has a higher gas-water separation efficiency under the condition of high water content of the intake air, but the larger aerodynamic resistance loss under the condition of small water volume cannot meet the requirements of the total intake pressure loss of the gas turbine for daily long-term operation. If the air intake filter device uses inertia stage blades with a smaller thickness, under short-term extreme sea conditions such as heavy rain and huge waves, the low air-water separation efficiency of the inertia stage blades will cause the gas turbine air intake quality to fail to meet the requirements.

[0005] Therefore, it is necessary to develop an intake filter device, the inertia stage blades, which can automatically change the blade thickness and the size of the water trough according to the water content in the incoming air under the condition of a large amount of salt spray liquid particles intake, and can quickly transport liquid particles and continuously capture and adsorb droplet particles, without significantly improving the resistance loss characteristics of the inertia stage blades, so as to ensure the stable and efficient operation of the gas turbine. Summary of the invention

[0006] The purpose of the present invention is to provide an inertia-stage blade that automatically changes the size of the water delivery trough and the thickness of the blade according to the water content of the air flow, which can quickly transport liquid particles under the condition of a large amount of salt spray liquid particles intake, continuously capture and adsorb droplet particles, and ensure the intake quality of the gas turbine.

[0007] An inertia-stage blade that automatically changes the size of a water delivery trough and the thickness of a blade according to the moisture content of an airflow, comprises an inlet guide plate, an outlet guide plate and a water delivery unit; the water delivery unit has multiple groups, including transition guide plates and a water delivery trough; the inlet guide plate, the outlet guide plate and the transition guide plates of each group of water delivery units all adopt the same three-layer sandwich form, including an upper metal material plate, a central core layer structural plate and a lower metal material plate, microporous structures are distributed on the upper metal material plate and the lower metal material plate, the central core layer structural plate adopts a first moisture-sensitive composite material, when the moisture content in the area where the inertia-stage blade is located exceeds a critical value of the first moisture-sensitive composite material, the central core layer structural plate only changes in size in the vertical direction, so that the blade thickness of the inertia-stage blade changes; the water delivery troughs of each group of water delivery units adopt the same second moisture-sensitive composite material, when the moisture content in the area where the inertia-stage blade is located exceeds a critical value of the second moisture-sensitive composite material, the water delivery trough only changes in size in the length direction.

[0008] Furthermore, multiple groups of inertia stage blades are arranged vertically facing the direction of airflow, each group of inertia stage blades are parallel to each other and maintain a distance between them, an airflow channel is formed between two adjacent groups of inertia stage blades, the inlet guide plate and the outlet guide plate are arranged parallel to the direction of airflow, and the opening direction of the water delivery trough of each water delivery unit is toward the direction of airflow.

[0009] Furthermore, the installation angle range between the inlet guide plate and the transition guide plate is 135° to 165°; the installation angle range between the transition guide plates of adjacent water transfer units is 90° to 150°.

[0010] Furthermore, in the initial state, the thickness of the inlet guide plate, the outlet guide plate and the transition guide plate of each group of water transfer units is L, the thickness of the upper metal material plate is the same as that of the lower metal material plate, the thickness L1 of the central core layer structure plate is L1∈[0.3L,0.5L], and the thickness of the central core layer structure plate is automatically adjusted within the range of L1 to 8.5L1 under the influence of the moisture content of the airflow.

[0011] Furthermore, the first moisture-sensitive composite material constituting the central core layer structural plate is designed according to the actual application conditions of the inertia stage blade. If the maximum water content of the airflow in the application condition is known to be x max , then the first humidity-sensitive composite material is designed to satisfy the following deformation formula:

[0012]

[0013] Where y1(x) is the deformation of the first humidity-sensitive composite material, x is the water content of the airflow; x1 is the critical water content at which the first humidity-sensitive composite material begins to deform, x1=x max / 2.2; x2 is the deformation limit water content of the first humidity-sensitive composite material, that is, after x>x2, the first humidity-sensitive composite material will no longer expand, x2=x max ; a is the deformation parameter of the first humidity-sensitive composite material, a=2.5±0.2.

[0014] Furthermore, in the initial state, the length L2 of the water delivery trough of each group of water delivery units is L2∈[8L,10L], and under the influence of the water content of the airflow, the length of the water delivery trough of each group of water delivery units is automatically adjusted within the range of L2~1.375L2.

[0015] Furthermore, the second moisture-sensitive composite material constituting the water delivery trough of each water delivery unit is designed according to the actual application conditions of the inertia stage blade. If the maximum water content of the airflow in the application condition is known to be x max , then the second humidity-sensitive composite material is designed to satisfy the following deformation formula:

[0016]

[0017] Wherein, y2(x) is the deformation amount of the second humidity-sensitive composite material, b is the deformation parameter of the second humidity-sensitive composite material, and b=2.2±0.15.

[0018] Furthermore, a transition section is provided between the water delivery trough and the transition guide plate, and the length of the transition section is 0.8L~L.

[0019] Furthermore, the outer wall surfaces of the inlet guide plate, the outlet guide plate and the transition guide plates of each group of water transfer units are provided with a hydrophilic coating and a hydrophobic coating, and the hydrophilic coating and the hydrophobic coating are arranged alternately in a grid form; the hydrophilic coating is used to adsorb water in the airflow and quickly converge it into droplets, and the hydrophobic coating is used to quickly transport and discharge the droplets. By arranging the hydrophilic coating and the hydrophobic coating alternately, the capture area of ​​the droplets is increased, and before they converge to form large-volume droplets, the droplets are transported and discharged using the characteristics of the hydrophobic coating to prevent the occurrence of secondary splashing.

[0020] Furthermore, the thickness of the hydrophilic coating is 0.15L~0.25L, the side length in the height direction is L~1.5L, and the side length in the flow direction is L~1.5L; the thickness of the hydrophobic coating is 0.15L~0.25L, the side length in the height direction is L~1.5L, and the side length in the flow direction is 0.8L~1.2L.

[0021] The beneficial effects of the present invention are:

[0022] The present invention can automatically change the thickness of the blades and the size of the water delivery trough according to the amount of water content in the airflow, and adjust the strength of the inertia-stage blades' ability to capture and transport droplets by changing the spacing of the inertia-stage blades and the size of the water delivery trough, and solve the problem of water delivery trough blockage, thereby ensuring the efficient gas-water separation efficiency of the inertia-stage blades under different inlet water content conditions. At the same time, through the combined effect of the staggered hydrophilic coating and the hydrophobic coating, small droplets are gathered into large droplets, thereby improving the capture and transport efficiency of liquid particles and preventing the occurrence of the "secondary splash" phenomenon. The present invention has the advantages of simple structure, convenient processing, high efficiency and reliability, and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1a It is a schematic diagram of the two-dimensional structure of the present invention.

[0024] Figure 1b It is a partial enlarged structural schematic diagram of the present invention.

[0025] Figure 2a It is a schematic diagram of the inertia stage blade structure when the water channel length is 8.3 mm (not extended).

[0026] Figure 2bThis is a schematic diagram of the inertia stage blade structure when the water channel length is 9.8mm (extended 1.5mm).

[0027] Figure 2c This is a schematic diagram of the inertia stage blade structure when the water channel length is 11.3mm (elongation 3.0mm).

[0028] Figure 3a This is a schematic diagram of the inertia stage blade structure when the blade thickness is 1.2 mm (not extended).

[0029] Figure 3b This is a schematic diagram of the inertia stage blade structure when the blade thickness is 2.2 mm (elongation 1 mm).

[0030] Figure 3c This is a schematic diagram of the inertia stage blade structure when the blade thickness is 3.2 mm (elongation 2 mm).

[0031] Figure 4a It is a schematic diagram of the coating structure at the inlet guide plate position.

[0032] Figure 4b This is a schematic diagram of the coating structure at the water trough location.

[0033] Figure 5 The velocity field distribution diagram in the inertial blade channel and the motion trajectory distribution diagram of droplets and particles. Among them, (a) is the velocity field distribution diagram in the inertial blade channel when the water trough length is 8.3mm and the blade thickness is 1.2mm (not stretched); (b) is the motion trajectory distribution diagram of droplets and particles in the inertial blade channel of the corresponding structure. (c) is the velocity field distribution diagram in the inertial blade channel when the blade thickness is 3.2mm (stretched 2mm); (d) is the motion trajectory distribution diagram of droplets and particles in the inertial blade channel of the corresponding structure. (e) is the velocity field distribution diagram in the inertial blade channel when the water trough length is 11.3mm (stretched 3.0mm); (f) is the motion trajectory distribution diagram of droplets and particles in the inertial blade channel of the corresponding structure.

[0034] Figure 6a It is a schematic diagram of the two-dimensional arrangement of the present invention in the installed state.

[0035] Figure 6b It is a schematic diagram of the three-dimensional arrangement of the present invention in the installed state. DETAILED DESCRIPTION

[0036] The present invention is further described below in conjunction with the accompanying drawings.

[0037] The present invention provides an inertia-stage blade that automatically changes the size of a water delivery trough and the thickness of a blade according to the moisture content of an airflow, comprising an inlet guide plate, an outlet guide plate and a water delivery unit; the installation angle between the inlet guide plate and the transition guide plate ranges from 135° to 165°; the installation angle between the transition guide plates of adjacent water delivery units ranges from 90° to 150°. A transition section is provided between the water delivery trough and the transition guide plate, and the length of the transition section is 0.8L to L.

[0038] Multiple groups of inertia stage blades are arranged vertically facing the direction of airflow, each group of inertia stage blades are parallel to each other and maintain a distance between them, an airflow channel is formed between two adjacent groups of inertia stage blades, the inlet guide plate and the outlet guide plate are arranged parallel to the direction of airflow, and the opening direction of the water delivery trough of each water delivery unit faces the direction of airflow.

[0039] There are multiple groups of water delivery units, including transition guide plates and water delivery troughs; the inlet guide plates, the outlet guide plates and the transition guide plates of each group of water delivery units all adopt the same three-layer sandwich form, including an upper metal material plate, a central core layer structural plate and a lower metal material plate, the upper metal material plate and the lower metal material plate are both provided with microporous structures, the central core layer structural plate adopts a first humidity-sensitive composite material, when the water content in the area where the inertia stage blades are located exceeds the critical value of the first humidity-sensitive composite material, the central core layer structural plate only changes in size in the vertical direction, causing the blade thickness of the inertia stage blades to change; the water delivery troughs of each group of water delivery units adopt the same second humidity-sensitive composite material, when the water content in the area where the inertia stage blades are located exceeds the critical value of the second humidity-sensitive composite material, the water delivery trough only changes in size in the length direction.

[0040] In the initial state, the thickness of the inlet guide plate, outlet guide plate and transition guide plate of each group of water delivery units is L, the thickness of the upper metal plate is the same as that of the lower metal plate, the thickness L1 of the central core structure plate is L1∈[0.3L,0.5L], and the thickness of the central core structure plate is automatically adjusted within the range of L1 to 8.5L1 under the influence of the moisture content of the airflow. In the initial state, the length L2 of the water delivery trough of each group of water delivery units is L2∈[8L,10L], and the length of the water delivery trough of each group of water delivery units is automatically adjusted within the range of L2 to 1.375L2 under the influence of the moisture content of the airflow.

[0041] The humidity-sensitive composite material is designed according to the actual application conditions of the inertia-stage blade. If the maximum water content of the airflow in the application condition is known to be x max , then the first humidity-sensitive composite material is designed to satisfy the following deformation formula:

[0042]

[0043] Where y1(x) is the deformation of the first humidity-sensitive composite material, x is the water content of the airflow; x1 is the critical water content at which the first humidity-sensitive composite material begins to deform, x1=x max / 2.2; x2 is the deformation limit water content of the first humidity-sensitive composite material, that is, after x>x2, the first humidity-sensitive composite material will no longer expand, x2=x max ; a is the deformation parameter of the first humidity-sensitive composite material, a=2.5±0.2.

[0044] The second moisture-sensitive composite material of the designed water trough satisfies the following deformation formula:

[0045]

[0046] Wherein, y2(x) is the deformation amount of the second humidity-sensitive composite material, b is the deformation parameter of the second humidity-sensitive composite material, and b=2.2±0.15.

[0047] The outer wall of the inlet guide plate, the outlet guide plate and the transition guide plate of each group of water delivery units is provided with a hydrophilic coating and a hydrophobic coating, which are arranged alternately in a grid form; the hydrophilic coating is used to absorb water in the airflow and quickly converge it into droplets, and the hydrophobic coating is used to quickly transport and discharge the droplets. The capture area of ​​the droplets is increased by staggered arrangement of the hydrophilic coating and the hydrophobic coating, and the droplets are transported and discharged by using the characteristics of the hydrophobic coating before they converge to form large-volume droplets, thereby preventing the occurrence of secondary splashing. The thickness of the hydrophilic coating is 0.15L~0.25L, the side length in the height direction is L~1.5L, and the side length in the flow direction is L~1.5L; the thickness of the hydrophobic coating is 0.15L~0.25L, the side length in the height direction is L~1.5L, and the side length in the flow direction is 0.8L~1.2L.

[0048] Embodiment 1:

[0049] like Figure 1a As shown, the inertia stage blade is composed of four water delivery units. The inlet guide plate 1 is connected to the first water delivery trough 3 through the first transition guide plate 2. The first water delivery trough 3 is connected to the second water delivery trough 5 through the second transition guide plate 4, the second water delivery trough 5 is connected to the third water delivery trough 7 through the third transition guide plate 6, and the third water delivery trough 7 is connected to the fourth water delivery trough 9 through the fourth transition guide plate 8. The fourth water delivery trough 9 is connected to the outlet guide plate 10. The thickness of the inertia stage blade is uniform, and the blade thickness is L.

[0050] like Figure 1bAs shown, the first water trough 3, the second water trough 5, the third water trough 7 and the fourth water trough 9 of the inertia stage blade are made of the second moisture-sensitive composite material, and the water trough structure changes in size only in the length direction, and does not change significantly in other directions. The water trough is installed in the normal direction of the transition guide plate, at a length position of 0.8L to 1.0L from the outer surface of the transition guide plate, and the installation line of the composite material and the transition guide plate metal material is parallel to the tangent direction of the transition guide plate. The inlet guide plate 1, the first transition guide plate 2, the second transition guide plate 4, the third transition guide plate 6, the fourth transition guide plate 8 and the outlet guide plate 10 of the inertia stage blade are three-layer sandwich structures. The upper and lower layers of each plate are made of metal material, and a large number of microporous structures are evenly distributed on the metal material plate. The core layer is made of the first moisture-sensitive composite material 11, and the core layer structure changes in size only in the direction perpendicular to the incoming flow, and does not change significantly in other directions. When no deformation occurs, the thickness of the core layer structure plate is 0.3L-0.5L, and at this time, in the thickness direction of the inertia stage blade, the thickness ratio of the upper metal material plate, the core composite material plate, and the lower metal material plate is 3:4:3. A coating 12 composed of a staggered arrangement of a hydrophilic coating and a hydrophobic coating is provided on each structural wall of the inertia stage blade.

[0051] Figure 4a and Figure 4b As shown, hydrophilic coating and hydrophobic coating are arranged on the surface of each folding plate structure of the inertia-stage blade, i.e., the inlet guide plate 1, the first transition guide plate 2, the second transition guide plate 4, the third transition guide plate 6, the fourth transition guide plate 8, and the outlet guide plate 10, and the hydrophilic coating and the hydrophobic coating are arranged alternately in the form of squares and rectangles. The coating thickness is about 0.2L. The height direction length of the staggered coating is L, and the flow direction length of the staggered coating varies according to the location, and the lengths are L and 0.8L respectively. The flow direction length of the coating at the rounded corner position of the leading edge end of the inlet guide plate 1 is L, and the flow direction length of the adjacent coating is 0.8L. The hydrophilic coating and the hydrophobic coating at the end positions of the inlet guide plate 1 and the outlet guide plate 10 are arranged symmetrically along the center line of the plate structure. There is no staggered coating on the wall of the water delivery trough.

[0052] like Figure 6a and Figure 6bAs shown, each inertia-stage blade consists of an inlet and outlet guide plate, four water delivery troughs and four transition guide plates. The length of the entire blade along the flow direction is approximately 100L to 120L, and the thickness of the blade is uniform. Several blades are arranged vertically facing the incoming direction of the airflow, and the inlet guide plate 1 and the outlet guide plate 10 are arranged parallel to the airflow direction. The blades are parallel to each other and work with equal spacing. The blade spacing is 10.0L. In order to suppress airflow separation, the air inlet edge of the inlet guide plate 1 and the air outlet edge of the outlet guide plate 10 are both arc-shaped transitions instead of sharp straight edges. The inlet guide plate 1 is connected to the first transition guide plate 2 in an arc, and the installation angle range is 135° to 180°. The outlet guide plate 10 is connected to the fourth transition guide plate 8 in an arc, and the installation angle range is 135° to 180°.

[0053] Compared with traditional inertia-stage blades, the present invention can automatically change the thickness of the inertia-stage blades and the size of the water trough according to the water content in the incoming air, thereby adjusting the strength of the inertia-stage blades' ability to capture and transport droplets, and ensuring the efficient gas-water separation efficiency of the inertia-stage blades under different air intake conditions. It solves the problem of reduced air intake quality of the gas turbine caused by a sharp increase in the droplet flow rate in the incoming air due to an increase in the water content of the intake air. At the same time, it solves the problem of increased resistance loss caused by the large thickness of the inertia-stage blades and the size of the water trough during the daily operation of the gas turbine. At the same time, the hydrophilic coating on the wall of the inertia-stage blade is used to capture small droplets, and the adjacent hydrophobic coating quickly increases the surface tension of the liquid film. The liquid film is gathered into droplets for transportation by staggered arrangement of the hydrophilic coating and the hydrophobic coating. The present invention can achieve the purpose of capturing and transporting droplets not only through the water trough structure, but also through the overall plate structure of the inertia-stage blade. At the same time, the staggered arrangement of hydrophilic coating and hydrophobic coating is used to adsorb the droplets on the surface of the inertial blade, and before the droplets converge to form large volume droplets, the water transport coating characteristics are used to transport and discharge the droplets to prevent the occurrence of "secondary splashing". The purification and separation efficiency of the inertial blade is comprehensively improved. The present invention has the advantages of simple structure, convenient processing, high efficiency and reliability, and low cost.

[0054] As shown in Table 1, through the aerodynamic separation test of the traditional inertia stage blade, it is found that as the water content of the intake air increases, the traditional inertia stage blade is limited by the separation efficiency and the escaped water volume increases significantly. Figure 2a , Figure 2b , Figure 2c As shown in the figure, although the resistance loss of the inertia stage blades increases with the increase in the size of the water trough, its separation efficiency is significantly restored, reaching and exceeding the separation efficiency of the traditional inertia stage blades in daily stable operating conditions. Figure 5As shown in (a), (b), (e), and (f), as the size of the water trough of the inertia stage blade increases, the air flow velocity inside the inertia stage blade channel increases, and more incoming liquid droplets are captured and transported by the water trough, thereby improving the gas-water separation efficiency.

[0055] Table 1. Test data of traditional inertia-stage blade performance

[0056]

[0057] Table 2 Performance simulation data of the inertia stage blade of the present invention under high water content intake conditions

[0058]

[0059] Table 3 Performance simulation data of the inertia stage blade of the present invention under high water content intake conditions

[0060]

[0061] As shown in Table 3, Figure 3a , Figure 3b , Figure 3c As shown in the figure, although the resistance loss of the inertia stage blades increases with the increase of blade thickness, its separation efficiency is also significantly restored, reaching and exceeding the separation efficiency of the traditional inertia stage blades in daily stable operation conditions. Figure 5 As shown in (a), (b), (c), and (d), as the thickness of the inertia stage blade increases, the air flow velocity inside the inertia stage blade channel increases, and more incoming droplet particles are captured and transported by the water trough, thereby improving the gas-water separation efficiency.

[0062] The present invention is used in the field of ship air intake filtration in offshore marine environments, and its specific functions are as follows:

[0063] When a ship is sailing at sea, the air inhaled by the air intake device contains a large amount of impurities such as seawater droplets, salt and aerosols. Salt is mainly dissolved in the droplet particles. The inertial stage blades use the inertial separation principle to separate gas and liquid. The mass of air per unit volume is much smaller than the mass of droplets per unit volume. When the airflow flows through the curved flow channel of the inertial stage blades, the air can easily change the flow direction, while the droplets are affected by inertia and maintain their original state of motion. As a result, the droplets hit the wall of the inertial stage blades to form a water film, which converges and flows downstream along the wall. After entering the hydrophobic groove, it flows to the bottom under the action of gravity and is separated. The present invention relies on a water trough made of a humidity-sensitive composite material and an inertial stage blade with a humidity-sensitive composite material as the core layer, which can automatically change the size of the water trough and the thickness of the blade according to the water content of the airflow. It is ensured that the inertial stage blades have a high gas-water separation efficiency under different air intake conditions.

[0064] In severe sea conditions or when the gas turbine output power is increased, the droplet content in the incoming air of the inertia stage blades increases dramatically. When the water content in the incoming air increases to a critical value (1.2 g / m 3 ), the humidity-sensitive composite materials with different expansion coefficients receive the signal of increased water content in the air, the humidity-sensitive composite materials will expand, and the water trough part will expand along the length direction, causing it to become larger; and the blades will also expand in the direction perpendicular to the incoming flow, resulting in an increase in blade thickness, thereby improving the water delivery capacity and separation efficiency of the inertia-stage blades. However, as the size of the water trough increases, the flow space for the airflow through the gap of the water trough decreases, the flow rate further increases, and the resistance loss of the inertia-stage blades increases. Therefore, at the expense of some resistance characteristics, the air-water separation efficiency under high incoming water content conditions is significantly improved, ensuring the intake quality of the gas turbine.

[0065] When the ship is sailing in normal sea conditions, the droplet content in the incoming air of the inertia blades decreases. When the water content of the incoming air is lower than the critical value (1.2g / m 3 ), the size of the water trough made of the humidity-sensitive composite material is reduced, the blade thickness is reduced, the airflow space becomes larger, and the airflow velocity is reduced. While ensuring the separation efficiency of the inertia stage blades, the pressure loss is reduced, and the requirements for the total intake pressure loss of the gas turbine for long-term operation are guaranteed. At the same time, the staggered arrangement of hydrophilic and hydrophobic coatings further enhances the droplet capture ability. The coating design on the blade surface enables the droplets to quickly converge into larger droplets and be quickly separated under the action of gravity and airflow, thereby improving the water delivery capacity of the blade. On the inlet guide plate of the blade and each transition guide plate, the staggered arrangement of the coating increases the capture area of ​​the droplets and reduces the risk of secondary splashing and blockage. In addition, for the design of the water trough, the coating size has also been optimized to ensure the rapid fall of the droplets, improve the capture and delivery efficiency, and ultimately improve the overall gas-liquid separation efficiency, thereby improving the intake quality of the gas turbine.

[0066] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An inertia-stage blade that automatically changes the size of the water delivery trough and the thickness of the blade according to the moisture content of the airflow, characterized in that: It comprises an inlet guide plate, an outlet guide plate and a water delivery unit; the water delivery unit has multiple groups, including transition guide plates and water delivery troughs; the inlet guide plate, the outlet guide plate and the transition guide plates of each group of water delivery units all adopt the same three-layer sandwich form, including an upper metal material plate, a central core layer structural plate and a lower metal material plate, the upper metal material plate and the lower metal material plate are both provided with microporous structures, the central core layer structural plate adopts a first humidity-sensitive composite material, when the water content in the area where the inertia stage blade is located exceeds the critical value of the first humidity-sensitive composite material, the central core layer structural plate only undergoes a size change in the vertical direction, so that the blade thickness of the inertia stage blade changes; the water delivery troughs of each group of water delivery units adopt the same second humidity-sensitive composite material, when the water content in the area where the inertia stage blade is located exceeds the critical value of the second humidity-sensitive composite material, the water delivery trough only undergoes a size change in the length direction.

2. The inertia-stage blade that automatically changes the water delivery trough size and blade thickness according to the water content of the airflow according to claim 1, characterized in that: Multiple groups of inertia stage blades are arranged vertically facing the direction of airflow, each group of inertia stage blades are parallel to each other and maintain a distance between them, an airflow channel is formed between two adjacent groups of inertia stage blades, the inlet guide plate and the outlet guide plate are arranged parallel to the direction of airflow, and the opening direction of the water delivery trough of each water delivery unit faces the direction of airflow.

3. The inertia-stage blade that automatically changes the water delivery trough size and blade thickness according to the water content of the airflow according to claim 1, characterized in that: The installation angle range between the inlet guide plate and the transition guide plate is 135° to 165°; the installation angle range between the transition guide plates of adjacent water delivery units is 90° to 150°.

4. The inertia-stage blade that automatically changes the water delivery trough size and blade thickness according to the water content of the airflow according to claim 1, characterized in that: In the initial state, the thickness of the inlet guide plate, the outlet guide plate and the transition guide plate of each group of water transfer units is L, the thickness of the upper metal material plate is the same as that of the lower metal material plate, the thickness L1 of the central core layer structure plate is L1∈[0.3L,0.5L], and the thickness of the central core layer structure plate is automatically adjusted within the range of L1 to 8.5L1 under the influence of the moisture content of the airflow.

5. The inertia-stage blade that automatically changes the water delivery trough size and blade thickness according to the water content of the airflow according to claim 4, characterized in that: The first moisture-sensitive composite material constituting the central core structure plate is designed according to the actual application conditions of the inertia stage blade. If the maximum moisture content of the airflow in the application condition is known to be x max , then the first humidity-sensitive composite material is designed to satisfy the following deformation formula: Where y1(x) is the deformation of the first humidity-sensitive composite material, x is the water content of the airflow; x1 is the critical water content at which the first humidity-sensitive composite material begins to deform, x1=x max / 2.2; x2 is the deformation limit water content of the first humidity-sensitive composite material, that is, after x>x2, the first humidity-sensitive composite material will no longer expand, x2=x max ; a is the deformation parameter of the first humidity-sensitive composite material, a=2.5±0.

2.

6. The inertia-stage blade that automatically changes the water delivery trough size and blade thickness according to the water content of the airflow according to claim 5, characterized in that: In the initial state, the length L2 of the water delivery trough of each group of water delivery units is L2∈[8L,10L]. Under the influence of the water content of the airflow, the length of the water delivery trough of each group of water delivery units is automatically adjusted within the range of L2 to 1.375L2.

7. The inertia-stage blade that automatically changes the water delivery trough size and blade thickness according to the water content of the airflow according to claim 6, characterized in that: The second moisture-sensitive composite material constituting the water delivery trough of each water delivery unit is designed according to the actual application conditions of the inertia stage blade. If the maximum water content of the airflow in the application condition is known to be x max , then the second humidity-sensitive composite material is designed to satisfy the following deformation formula: Wherein, y2(x) is the deformation amount of the second humidity-sensitive composite material, b is the deformation parameter of the second humidity-sensitive composite material, and b=2.2±0.

15.

8. The inertia-stage blade that automatically changes the water delivery trough size and blade thickness according to the water content of the airflow according to claim 1, characterized in that: A transition section is provided between the water delivery trough and the transition guide plate, and the length of the transition section is 0.8L~L.

9. The inertia-stage blade that automatically changes the water delivery trough size and blade thickness according to the water content of the airflow according to claim 1, characterized in that: The outer wall surfaces of the inlet guide plate, the outlet guide plate and the transition guide plates of each group of water delivery units are provided with a hydrophilic coating and a hydrophobic coating, and the hydrophilic coating and the hydrophobic coating are arranged alternately in a grid form; the hydrophilic coating is used to adsorb water in the airflow and quickly converge it into droplets, and the hydrophobic coating is used to quickly transport and discharge the droplets. The capture area of ​​the droplets is increased by the staggered arrangement of the hydrophilic coating and the hydrophobic coating, and before they converge to form large-volume droplets, the droplets are transported and discharged using the characteristics of the hydrophobic coating to prevent the occurrence of secondary splashing.

10. The inertia-stage blade that automatically changes the water delivery trough size and blade thickness according to the water content of the airflow according to claim 9, characterized in that: The thickness of the hydrophilic coating is 0.15L to 0.25L, the side length in the height direction is L to 1.5L, and the side length in the flow direction is L to 1.5L; the thickness of the hydrophobic coating is 0.15L to 0.25L, the side length in the height direction is L to 1.5L, and the side length in the flow direction is 0.8L to 1.2L.

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