A hot-air anti-icing test model for icing wind tunnel

Abstract

The application discloses an icing wind tunnel hot air anti-icing test model, and belongs to the technical field of aircraft icing test. The model comprises a leading edge slat structure, the leading edge slat structure is provided with a hot air cavity and a vent cavity, the hot air cavity and the vent cavity are communicated through a plurality of air gap holes, a plurality of discharge holes are arranged on the outer wall of the vent cavity, one side of the model is provided with a connecting sleeve, the other side is connected with a half mold mechanism driving end assembly, the sealed end of a flute-shaped pipe penetrates through the connecting sleeve and extends into the hot air cavity, a plurality of air exhaust holes are arranged on the flute-shaped pipe in the axial direction, a driven shaft is a pipe shaft component, the driven shaft is detachably connected with the half mold mechanism driven end assembly, the open end of the flute-shaped pipe extends into the driven shaft, and the other end of the driven shaft is in plug-in sealing cooperation with a hot air pipeline. The application is convenient for quick dismounting of the hot air pipeline and the flute-shaped pipe, and avoids the melting and degradation of ice shapes caused by too long waiting time.

Description

Technical Field

[0001] This invention belongs to the field of aircraft icing test technology, and particularly relates to an icing wind tunnel hot gas anti-icing test model. Background Technology

[0002] Aircraft icing poses a serious threat to flight safety, and thermal anti-icing has been applied to most transport aircraft. To study the effectiveness of thermal anti-icing on wing anti-icing, relevant testing and research are necessary. Icing wind tunnel testing is a common method for studying the mechanism of aircraft wing icing. Conducting anti-icing and de-icing tests on a thermal anti-icing test model in an icing wind tunnel is an effective testing method for studying the effectiveness of thermal anti-icing. In thermal anti-icing tests, the external thermal piping of the model needs to be adjusted according to the model's angle of attack while ensuring the piping's sealing. Furthermore, after the test, operations such as hand-drawing the icing pattern and 3D icing pattern scanning are required. The model design allows for rapid opening of the test section's sidewalls to prevent icing degradation. In some tests, it is also necessary to easily replace the flute tubes to study the anti-icing effect of different flute tube types. This invention discloses a hot gas anti-icing test model. Its drive shaft is mounted on a half-mold mechanism, allowing adjustment of the model's angle of attack. The driven shaft is a hollow structure serving as a hot gas pipeline, with a flute-shaped tube installed inside the driven shaft. Hot gas enters the flute-shaped tube from inside the driven shaft. The flute-shaped tube is installed inside the driven shaft, and the driven shaft and connecting sleeve have a clearance fit, with a sealing ring between them to ensure the hot gas pipeline's airtightness. Based on this invention's hot gas anti-icing test model, the driven shaft and model have a plug-in structure. After the test, the driven shaft and hot gas pipeline can be quickly disassembled, allowing the test section sidewall to be opened and ice shape measurements to be performed. Furthermore, it significantly reduces the workload of replacing the flute-shaped tube, improving test efficiency. Summary of the Invention

[0003] The purpose of this invention is to provide a hot gas anti-icing test model for icing wind tunnels, to solve the problems of melting and degradation of ice formation due to excessively long waiting times in existing hot gas anti-icing tests for icing wind tunnels. The technical solution adopted by this invention is as follows:

[0004] An anti-icing test model for hot air in an icing wind tunnel is provided. The model is tested in a test section of the icing wind tunnel. A half-mold mechanism drive end assembly is provided on one side wall of the test section, and an opening is provided on the other side wall of the test section. A wall panel door opens and closes the opening. A half-mold mechanism driven end assembly is provided on the wall panel door. The working end of the half-mold mechanism drive end assembly and the working end of the half-mold mechanism driven end assembly are coaxially arranged.

[0005] The model includes a slat leading edge skin, a slat trailing edge skin, an air cushion plate, and a wing box. The slat leading edge skin, the slat trailing edge skin, and the air cushion plate form a leading edge slat structure. The air cushion plate divides the interior of the leading edge slat structure into a hot air chamber at the front and an venting chamber at the rear. The hot air chamber and the venting chamber are connected through several air gap channels. Two slat supports are connected to the slat leading edge skin, the slat trailing edge skin, and the air cushion plate, and correspondingly seal the two ends of the hot air chamber and the two ends of the venting chamber. The two ends of the wing box are respectively connected to the two slat supports. A heat-insulating rubber pad is provided between the wing box and the leading edge slat structure. Several discharge holes are provided on the slat trailing edge skin.

[0006] A connecting sleeve is provided on one side of the slit bracket, and the slit bracket on the other side is connected to the working end of the half-mold mechanism drive end assembly through the drive shaft. The flute tube is a tubular component with one end open. The sealed end of the flute tube passes through the connecting sleeve and extends into the hot air chamber. Several exhaust holes are provided on the flute tube along the axial direction.

[0007] The driven shaft is a tubular shaft component. When the wall panel door is closed, the driven shaft is detachably connected to the working end of the driven end assembly of the half-mold mechanism. One end of the driven shaft passes through the wall panel door and is inserted into the connecting sleeve for sealing. The open end of the flute-shaped tube extends into the driven shaft, and the other end of the driven shaft is inserted into the hot air pipeline for sealing.

[0008] Furthermore, the air cushion plate is vertically arranged, with its upper and lower sides respectively connected to the upper and lower walls of the slat leading edge skin. The rear end of the upper wall of the slat leading edge skin is connected to the rear end of the slat trailing edge skin, and the front end of the slat trailing edge skin is connected to the air cushion plate. A hot air cavity is formed between the front part of the slat leading edge skin and the air cushion plate, and an venting cavity is formed between the rear part of the upper wall of the slat leading edge skin, the slat trailing edge skin, and the air cushion plate. Several air gap grooves are opened on the upper side end face of the air cushion plate, and the several air gap grooves and the upper wall of the slat leading edge skin cooperate to form several air gap channels.

[0009] Furthermore, the wing box is located below the trailing edge skin of the slat, and the rear part of the trailing edge skin of the slat abuts against the upper side of the wing box through an insulating rubber pad. The rear end of the lower sidewall of the leading edge skin of the slat is close to the lower side of the wing box. A gap is formed between the wing box, the front part of the trailing edge skin of the slat, and the air cushion plate. Several discharge holes are provided at the front part of the trailing edge skin of the slat, and the several discharge holes face the gap.

[0010] Furthermore, when the driven shaft is inserted into the connecting sleeve, the outer circumference of the connecting sleeve and the inner circumference of the driven shaft are sealed together by several sealing rings.

[0011] Furthermore, the flute-shaped tube has a shoulder structure on the outer periphery of its open end. The flute-shaped tube fits with the inner hole stop of the connecting sleeve through the shoulder structure. The outer diameter of the shoulder structure is smaller than the outer diameter of the connecting sleeve.

[0012] Furthermore, several exhaust vents are positioned facing forward.

[0013] Furthermore, the outer periphery of the open end of the flute-shaped tube is provided with a key-shaped protrusion structure, and the inner wall of the end where the driven shaft is inserted and engaged with the connecting sleeve is provided with a key-shaped slot structure. When the driven shaft is inserted and engaged with the connecting sleeve, the key-shaped protrusion structure and the key-shaped slot structure engage.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] 1. The model of this invention can be installed on the half-model mechanism of the icing wind tunnel to carry out hot gas anti-icing and de-icing tests. The driven shaft and the driving shaft jointly support the model. The open end of the flute-shaped tube is inserted into the driven shaft, which is then inserted into the connecting sleeve on the model. At the same time, the driven shaft is connected to the driven end component of the half-model mechanism. As part of the hot gas flow channel, the driven shaft can be quickly disassembled from the hot gas pipeline, the connecting sleeve, and the flute-shaped tube. This allows for quick replacement of flute-shaped tubes with different configurations and facilitates opening the side wall of the test section to carry out ice shape measurement and other work. This avoids the melting and degradation of ice due to excessive waiting time, and greatly improves the efficiency of the test.

[0016] 2. This invention proposes a design method for a flute-shaped tube. When the ratio of static pressure to dynamic pressure at the exhaust port is greater than or equal to 3, the outlet angle of the exhaust port is greater than or equal to 60°. Combined with the design of conditions 1 and 3, the hot gas ejected from each exhaust port can be uniform and the flow rate is consistent, which is more conducive to observing the anti-icing and de-icing effect of the model in the spanwise direction under the condition that each exhaust port ejects hot gas uniformly. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the device of the present invention;

[0018] Figure 2 yes Figure 1 A diagram showing the removal of the leading edge skin of the slats;

[0019] Figure 3 This is a top sectional view of the device of the present invention;

[0020] Figure 4 yes Figure 3 Enlarged view of point A;

[0021] Figure 5 yes Figure 3 BB cross-sectional view;

[0022] Figure 6 This is a cross-sectional view of the leading edge slat structure;

[0023] Figure 7 This is a schematic diagram of the air cushion plate structure;

[0024] Figure 8 This is a structural schematic diagram of the driven shaft;

[0025] Figure 9 This is a partial structural diagram of a flute-shaped tube;

[0026] Figure 10 This is a schematic diagram of the structure of the trailing edge skin of the slat;

[0027] Figure 11 This is a schematic diagram of the outflow status of the first and nth exhaust ports.

[0028] In the diagram, 1. Drive shaft, 2. Slat leading edge skin, 3. Driven shaft, 4. Wing box, 5. Slat support, 6. Flute tube, 7. Air cushion plate, 8. Slat trailing edge skin, 9. Insulating rubber pad, 10. Connecting sleeve, 11. Sealing ring, 12. Half-mold mechanism drive end assembly, 13. Side wall, 14. Half-mold mechanism driven end assembly, 15. Vent hole, 16. Air gap channel, 17. Hot air chamber, 18. Vent cavity, 19. Air gap groove, 20. Discharge hole, 21. Key-shaped slot structure, 22. Shoulder structure, 23. Key-shaped protrusion structure, 24. Leading edge slat structure. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this invention clearer, the invention is described below with reference to specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0030] The connections mentioned in this invention are divided into fixed connections and detachable connections. Fixed connections, also known as non-detachable connections, include but are not limited to conventional fixed connection methods such as folded connections, riveted connections, adhesive connections, and welded connections. Detachable connections include but are not limited to conventional disassembly methods such as bolted connections, snap-fit ​​connections, pin connections, and hinged connections. When a specific connection method is not explicitly defined, it is assumed that at least one existing connection method can be found to achieve this function, and those skilled in the art can choose according to their needs. For example, a welded connection can be chosen for fixed connections, and a bolted connection can be chosen for detachable connections.

[0031] The present invention will be further described in detail below with reference to the accompanying drawings. The following embodiments are explanations of the present invention, but the present invention is not limited to the following embodiments.

[0032] Example 1: As Figures 1-10As shown, an anti-icing test model for hot air in an icing wind tunnel is provided. The model is tested in a test section of the icing wind tunnel. A half-mold mechanism drive end assembly 12 is provided on one side wall 13 of the test section, and an opening is provided on the other side wall 13 of the test section. A wall panel door opens and closes the opening. A half-mold mechanism driven end assembly 14 is provided on the wall panel door. The working end of the half-mold mechanism drive end assembly 12 and the working end of the half-mold mechanism driven end assembly 14 are coaxially arranged.

[0033] The model includes a slat leading edge skin 2, a slat trailing edge skin 8, an air cushion plate 7, and a wing box 4. The slat leading edge skin 2, the slat trailing edge skin 8, and the air cushion plate 7 form a leading edge slat structure 24. The air cushion plate 7 divides the interior of the leading edge slat structure 24 into a hot air chamber 17 located at the front and an venting chamber 18 located at the rear. The hot air chamber 17 and the venting chamber 18 are connected through several air gap channels 16. Two slat supports 5 are connected to the slat leading edge skin 2, the slat trailing edge skin 8, and the air cushion plate 7, and correspondingly close the two ends of the hot air chamber 17 and the two ends of the venting chamber 18. The two ends of the wing box 4 are respectively connected to the two slat supports 5. A heat-insulating rubber pad 9 is provided between the wing box 4 and the leading edge slat structure 24. Several discharge holes 20 are provided on the slat trailing edge skin 8.

[0034] A connecting sleeve 10 is provided on one side of the slit bracket 5, and the other side of the slit bracket 5 is connected to the working end of the half mold mechanism drive end assembly 12 through the drive shaft 1. The flute tube 6 is a tubular component with one end open. The sealed end of the flute tube 6 passes through the connecting sleeve 10 and extends into the hot air chamber 17. Several exhaust holes 15 are provided on the flute tube 6 along the axial direction.

[0035] Driven shaft 3 is a tube shaft component. When the wall panel door is closed, driven shaft 3 is detachably connected to the working end of driven end assembly 14 of half mold mechanism. One end of driven shaft 3 passes through the wall panel door and is inserted into the connecting sleeve 10 for sealing. The open end of flute tube 6 extends into driven shaft 3, and the other end of driven shaft 3 is inserted into the hot air pipeline for sealing.

[0036] The air cushion plate 7 is vertically arranged. The upper and lower sides of the air cushion plate 7 are respectively connected to the upper and lower walls of the leading edge skin 2 of the slat. The rear end of the upper wall of the leading edge skin 2 is connected to the rear end of the trailing edge skin 8 of the slat. The front end of the trailing edge skin 8 is connected to the air cushion plate 7. A hot air cavity 17 is formed between the front part of the leading edge skin 2 and the air cushion plate 7. An air venting cavity 18 is formed between the rear part of the upper wall of the leading edge skin 2, the trailing edge skin 8, and the air cushion plate 7. Several air gap grooves 19 are opened on the upper side end face of the air cushion plate 7. Several air gap grooves 19 and the upper wall of the leading edge skin 2 of the slat cooperate to form several air gap channels 16.

[0037] The wing box 4 is located below the slat trailing edge skin 8. The rear part of the slat trailing edge skin 8 abuts against the upper side of the wing box 4 through the heat-insulating rubber pad 9. The rear end of the lower sidewall of the slat leading edge skin 2 is close to the lower side of the wing box 4. A gap is formed between the wing box 4, the front part of the slat trailing edge skin 8, and the air cushion plate 7. A number of discharge holes 20 are provided at the front part of the slat trailing edge skin 8, and the number of discharge holes 20 face the gap.

[0038] When the driven shaft 3 is inserted into the connecting sleeve 10, the outer circumference of the connecting sleeve 10 and the inner circumference of the driven shaft 3 are sealed together by a number of sealing rings 11.

[0039] The outer periphery of the open end of the flute tube 6 is provided with a shoulder structure 22. The flute tube 6 is engaged with the inner hole stop of the connecting sleeve 10 through the shoulder structure 22, which restricts the movement of the flute tube 6 along the length direction. The outer diameter of the shoulder structure 22 is smaller than the outer diameter of the connecting sleeve 10, so that when the connecting sleeve 10 is inserted into the driven shaft 3, the opening of the flute tube 6 can extend into the driven shaft 3.

[0040] Several exhaust holes 15 are set facing forward.

[0041] The outer periphery of the open end of the flute tube 6 is provided with a key-shaped protrusion structure 23. The inner wall of the end of the driven shaft 3 that is inserted into the connecting sleeve 10 is provided with a key-shaped slot structure 21. When the driven shaft 3 is inserted into the connecting sleeve 10, the key-shaped protrusion structure 23 and the key-shaped slot structure 21 cooperate to restrict the rotation of the flute tube 6.

[0042] In this invention, the leading edge skin 2, trailing edge skin 8, and ventilation pad 7 of the slat are all mounted on the slat bracket 5. The slat bracket 5 is connected to the wing box 4 by screws. An insulating rubber pad is placed between the slat bracket 5 and the wing box 4 to prevent heat transfer to the wing box 4. The wing box 4 can also adopt a frame and skin structure. The half-mold mechanism drive end assembly 12 drives the drive shaft 1 and the model to rotate, which is used to adjust the test angle of attack of the model.

[0043] Hot gas can be discharged into the hot gas chamber 17 through the driven shaft 3, the flute-shaped tube 6, and several exhaust holes 15 in sequence, and then enter the venting chamber 18 through several air gap channels 16. Finally, it is discharged from the model through several exhaust holes 20. The model of the present invention can be installed on the half-model mechanism of the icing wind tunnel to carry out hot gas anti-icing and de-icing tests.

[0044] The driven shaft 3 and the driving shaft 1 jointly support the model. The open end of the flute-shaped tube 6 is inserted into the driven shaft 3, and the driven shaft 3 is inserted into the connecting sleeve 10 on the model. At the same time, the driven shaft 3 is connected to the driven end assembly 14 of the half-mold mechanism. As part of the hot air flow channel, the driven shaft 3 can be quickly disassembled from the hot air pipeline, the connecting sleeve 10 and the flute-shaped tube 6. It allows for quick replacement of flute-shaped tubes 6 with different configurations, and facilitates opening the side wall 13 of the test section to carry out ice shape measurement and other work. It avoids the phenomenon of ice shape melting and deterioration due to excessive waiting time, and greatly improves the test efficiency.

[0045] Example 2: Figures 1 to 11 As shown, a method for designing a flute-shaped tube, wherein the flute-shaped tube is the flute-shaped tube 6 described in Embodiment 1, includes the following steps:

[0046] Step 1: Define the design objective: To ensure that the hot air ejected from each exhaust port 15 is uniform and has a consistent flow rate, the following two conditions must be met simultaneously:

[0047] Condition 1: The processing technology, shape and flow coefficient of each exhaust port 15 are the same;

[0048] Condition 2: The airflow outflow angle α of each exhaust port 15 is ≥60°;

[0049] Step 2: Number the proposed vent holes 15 according to their distance from the opening end of the flute-shaped tube 6 from closest to furthest. The static pressure at the location of each vent hole 15 inside the flute-shaped tube 6 is calculated using the following formula:

[0050] (1)

[0051] In the formula: P jn L is the static pressure at the location of the nth exhaust port 15 inside the flute tube 6. n Let μ be the airflow rate of the nth exhaust port 15. n Let f be the flow coefficient of the nth exhaust port 15. n Let ρ be the orifice area of ​​the nth exhaust port 15, and ρ be the density of the hot gas.

[0052] Step 3: Taking the first vent hole 15 as the reference, initially set the orifice area f1 and flow coefficient μ1 of the first vent hole 15, and substitute them into equation (1) to calculate the static pressure P at the location of the first vent hole 15 in the flute tube 6. j1 :

[0053] Step 4: Under test conditions, measure the total pressure P at the location of the first vent hole 15 inside the flute tube 6. 01 The dynamic pressure P at the location of the first exhaust hole 15 inside the flute tube 6 is... d1 Calculated using the following formula:

[0054] (2)

[0055] Step 5, if P j1 With P d1 If the ratio is greater than or equal to 3, then retain the initial values ​​of f1 and μ1. If P j1 With P d1 If the ratio is less than 3, adjust the initial values ​​of f1 and μ1 until P... j1 With P d1 The ratio is greater than or equal to 3;

[0056] Step 6: The dynamic pressure P at the location of the nth exhaust port 15 inside the flute tube 6. dn Calculated using the following formula:

[0057] (3)

[0058] In the formula: R is the friction loss per unit length inside the flute tube 6, l is the distance between the nth exhaust hole 15 and the first exhaust hole 15, and Z is the local resistance loss between the nth exhaust hole 15 and the first exhaust hole 15.

[0059] Step 7: Initially define the orifice area f of the nth vent hole 15. n and flow coefficient μ n Substitute the values ​​into equation (1) to calculate the static pressure P at the location of the nth exhaust hole 15 inside the flute tube 6. jn :

[0060] Step 8: Calculate the static pressure P at the location of the nth vent hole 15 inside the flute-shaped tube 6, as obtained in Step 7. jn Substitute into equation (3) to calculate the dynamic pressure P. dn :

[0061] Step 9, if P jn With P dn If the ratio is greater than or equal to 3, then retain f. n and μ n The initial value of P, if jn With P dn If the ratio is less than 3, then adjust f. n and μ n The initial value of P is set so that jn With P dn The ratio is greater than or equal to 3;

[0062] Step 10: Repeat steps 6 to 9 to determine the orifice area and flow coefficient of all exhaust holes 15;

[0063] Step 11: Design all exhaust holes 15 to have similar shapes.

[0064] This invention proposes a design method for the flute-shaped tube 6. When the ratio of static pressure to dynamic pressure at the exhaust port 15 is greater than or equal to 3, the outflow angle of each exhaust port 15 is greater than or equal to 60°, satisfying condition 2. By designing the shapes of all exhaust ports 15 to be similar, condition 1 can be satisfied. This makes the hot gas ejected from each exhaust port 15 uniform and the flow rate consistent, which is more conducive to observing the anti-icing and de-icing effect of the model in the spanwise direction under the condition that each exhaust port 15 ejects hot gas uniformly.

[0065] The above embodiments are merely illustrative examples of the present invention and do not limit its scope of protection. Those skilled in the art can make partial changes to them, as long as they do not exceed the spirit and essence of the present invention, they are all within the scope of protection of the present invention.

Claims

1. An anti-icing test model for hot air in an icing wind tunnel, wherein the model is tested in a test section of an icing wind tunnel, a half-mold mechanism drive end assembly (12) is provided on one side wall (13) of the test section, and an opening is provided on the other side wall (13) of the test section, and a wall panel door opens and closes the opening, and a half-mold mechanism driven end assembly (14) is provided on the wall panel door, and the working end of the half-mold mechanism drive end assembly (12) and the working end of the half-mold mechanism driven end assembly (14) are coaxially arranged; Its features are: The model includes a slat leading edge skin (2), a slat trailing edge skin (8), an air cushion (7), and a wing box (4). The slat leading edge skin (2), the slat trailing edge skin (8), and the air cushion (7) form a leading edge slat structure (24). The air cushion (7) divides the interior of the leading edge slat structure (24) into a hot air chamber (17) at the front and an venting chamber (18) at the rear. The hot air chamber (17) and the venting chamber (18) are connected by several air gaps. The channel (16) is connected, and the two slat brackets (5) are connected to the leading edge skin (2), the trailing edge skin (8) and the air cushion plate (7) of the slat, and correspondingly close the two ends of the hot air chamber (17) and the two ends of the venting chamber (18). The two ends of the wing box (4) are respectively connected to the two slat brackets (5). A heat-insulating rubber pad (9) is provided between the wing box (4) and the leading edge slat structure (24). Several discharge holes (20) are provided on the trailing edge skin (8). A connecting sleeve (10) is provided on one side of the slit bracket (5), and the slit bracket (5) on the other side is connected to the working end of the half mold mechanism drive end assembly (12) through the drive shaft (1). The flute tube (6) is a tubular component with one end open. The sealed end of the flute tube (6) passes through the connecting sleeve (10) and extends into the hot air chamber (17). Several exhaust holes (15) are provided on the flute tube (6) along the axial direction. The driven shaft (3) is a tube shaft component. When the wall panel door is closed, the driven shaft (3) is detachably connected to the working end of the driven end assembly (14) of the half mold mechanism. One end of the driven shaft (3) passes through the wall panel door and is inserted into the connecting sleeve (10) for sealing. The open end of the flute tube (6) extends into the driven shaft (3), and the other end of the driven shaft (3) is inserted into the hot air pipeline for sealing.

2. The icing wind tunnel hot gas anti-icing test model according to claim 1, characterized in that: The air cushion plate (7) is vertically arranged. The upper and lower sides of the air cushion plate (7) are respectively connected to the upper and lower walls of the leading edge skin (2) of the slat. The rear end of the upper wall of the leading edge skin (2) of the slat is connected to the rear end of the trailing edge skin (8) of the slat. The front end of the trailing edge skin (8) of the slat is connected to the air cushion plate (7). A hot air cavity (17) is formed between the front part of the leading edge skin (2) of the slat and the air cushion plate (7). An air venting cavity (18) is formed between the rear part of the upper wall of the leading edge skin (2) of the slat and the trailing edge skin (8) of the slat and the air cushion plate (7). Several air gap grooves (19) are opened on the upper side end face of the air cushion plate (7). Several air gap grooves (19) and the upper wall of the leading edge skin (2) of the slat cooperate to form several air gap channels (16).

3. The icing wind tunnel hot gas anti-icing test model according to claim 2, characterized in that: The wing box (4) is located on the lower side of the slat trailing edge skin (8). The rear part of the slat trailing edge skin (8) abuts against the upper side of the wing box (4) through the heat-insulating rubber pad (9). The rear end of the lower side wall of the slat leading edge skin (2) is close to the lower side of the wing box (4). A gap is formed between the wing box (4), the front part of the slat trailing edge skin (8), and the air cushion plate (7). A number of discharge holes (20) are provided on the front part of the slat trailing edge skin (8), and the number of discharge holes (20) face the gap.

4. The icing wind tunnel hot gas anti-icing test model according to claim 1, characterized in that: When the driven shaft (3) is inserted into the connecting sleeve (10), the outer circumference of the connecting sleeve (10) and the inner circumference of the driven shaft (3) are sealed together by several sealing rings (11).

5. The icing wind tunnel hot gas anti-icing test model according to claim 4, characterized in that: The flute tube (6) has a shoulder structure (22) on the outer periphery of its open end. The flute tube (6) is fitted with the inner hole stop of the connecting sleeve (10) through the shoulder structure (22). The outer diameter of the shoulder structure (22) is smaller than the outer diameter of the connecting sleeve (10).

6. The icing wind tunnel hot gas anti-icing test model according to any one of claims 1-5, characterized in that: Several exhaust holes (15) are set facing forward.

7. The icing wind tunnel hot gas anti-icing test model according to claim 6, characterized in that: The outer periphery of the open end of the flute tube (6) is provided with a key-shaped protrusion structure (23), and the inner wall of the end where the driven shaft (3) is inserted and engaged with the connecting sleeve (10) is provided with a key-shaped slot structure (21). When the driven shaft (3) is inserted and engaged with the connecting sleeve (10), the key-shaped protrusion structure (23) engages with the key-shaped slot structure (21).

Images