Aircraft inlet stealth structure and method

Abstract

The application discloses an aircraft inlet stealth structure and method, and the structure comprises a stealth grid and a plasma generating assembly; the stealth grid is fixedly installed at an air inlet of an aircraft inlet; the plasma generating assembly is arranged in a grid hole of the stealth grid; the plasma generating assembly comprises a negative electrode rod and a positive electrode rod, and the negative electrode rod and the positive electrode rod are arranged in parallel. The method is as follows: starting a plasma generator, electrifying the negative electrode rod and the positive electrode rod, generating high-energy plasma between the two electrode rods, mixing the high-energy plasma with high-speed free flow to form a high-energy plasma flow, and further fusing and superimposing the high-energy plasma flow formed in each grid hole to form a high-energy plasma group distributed in the stealth grid and the inside of the inlet, so that the inlet is stealthy through the high-energy plasma group; and the strength and size of the high-energy plasma generated between the negative electrode rod and the positive electrode rod are adjusted by adjusting the voltage and frequency of the plasma generator, so as to change the stealth effect of the inlet.

Description

Technical Field

[0001] This invention belongs to the field of aircraft stealth technology, and in particular relates to an aircraft air intake stealth structure and method. Background Technology

[0002] With the rapid development of drone technology, the requirements for drone stealth are becoming increasingly stringent. Currently, drone stealth technology mainly focuses on shape stealth and coating stealth, neglecting the stealth of the air intake, a weak point. Therefore, to further improve the overall stealth effect of drones, it is imperative to enhance the stealth performance of the aircraft's air intake. Summary of the Invention

[0003] To address the problems existing in the prior art, this invention provides a stealth structure and method for an aircraft air intake. For the first time, it organically combines grid stealth technology with plasma stealth technology, allowing the stealth grid at the air intake to be more sparse, reducing the obstruction of the stealth grid to the air intake. While using the stealth grid to block and reflect electromagnetic waves, it absorbs electromagnetic waves through plasma, ultimately improving the stealth effect of the aircraft air intake.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a stealth structure for an aircraft air intake, comprising a stealth grille and a plasma generating assembly; the stealth grille is fixedly installed at the air intake of the aircraft air intake; the plasma generating assembly is disposed within the grille holes of the stealth grille; the plasma generating assembly comprises a cathode electrode rod and a anode electrode rod, the cathode electrode rod and the anode electrode rod being distributed in parallel.

[0005] The plane containing the stealth grille has an angle relative to the vertical plane, ranging from 20° to 30°.

[0006] The connecting wires of the negative electrode rod are laid on the windward side of the stealth grid; the connecting wires of the positive electrode rod are laid on the leeward side of the stealth grid.

[0007] The distance between the negative electrode rod and the positive electrode rod is not less than 2 / 3 of the side length of the grid hole.

[0008] The negative electrode rod and the positive electrode rod are connected to the plasma generator via connecting wires. The plasma generator is installed inside the aircraft and is a voltage and frequency adjustable plasma generator.

[0009] A stealth method for an aircraft air intake, employing the aforementioned stealth structure, specifically involves: when stealth is required for the aircraft air intake, a plasma generator is activated, energizing the cathode and anode rods to generate high-energy plasma between them. This high-energy plasma mixes with a high-speed free-flowing stream, forming a high-energy plasma airflow. Simultaneously, the high-energy plasma airflows formed within each grid opening further merge and superimpose, forming high-energy plasma clusters distributed within the stealth grids and the air intake. This high-energy plasma clusters achieve air intake stealth. Furthermore, by adjusting the voltage and frequency of the plasma generator, the intensity and magnitude of the high-energy plasma generated between the cathode and anode rods are adjusted to modify the air intake stealth effect.

[0010] The beneficial effects of this invention are:

[0011] The stealth structure and method for aircraft air intakes of the present invention is the first to organically combine grid stealth technology with plasma stealth technology. This allows the stealth grid at the air intake to be made more sparse, reducing the obstruction of the stealth grid to the air intake. While using the stealth grid to block and reflect electromagnetic waves, the plasma absorbs electromagnetic waves, ultimately improving the stealth effect of the aircraft air intake. Attached Figure Description

[0012] Figure 1 This is a partial structural schematic diagram of the stealth structure of the aircraft air intake of the present invention.

[0013] Figure 2 This is a schematic diagram of the stealth grille structure of the stealth structure for the aircraft air intake of the present invention.

[0014] Figure 3 A schematic diagram of an aircraft that employs the stealth structure of the aircraft air intake of the present invention;

[0015] In the diagram, 1—stealth grid, 2—grid hole, 3—cathode rod, 4—anode rod. Detailed Implementation

[0016] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0017] like Figures 1-3 As shown, a stealth structure for an aircraft air intake includes a stealth grille 1 and a plasma generating assembly; the stealth grille 1 is fixedly installed at the air intake of the aircraft air intake; the plasma generating assembly is disposed in the grille hole 2 of the stealth grille 1; the plasma generating assembly includes a negative electrode rod 3 and a positive electrode rod 4, which are distributed in parallel.

[0018] In this embodiment, the upper and lower ends of the cathode rod 3 and the anode rod 4 are inserted into the stealth grid 1 to a depth equal to half the wall thickness of the stealth grid 1. This ensures that the cathode rod 3 and the anode rod 4 can be stably supported in the grid hole 2, and also prevents the stealth grid 1 from deforming.

[0019] The plane containing the stealth grille 1 has an angle relative to the vertical plane, ranging from 20° to 30°. If the angle is too large, it will reduce the engine's air intake; if the angle is too small, it will increase the radar echo and reduce the stealth effect of the air intake.

[0020] The connecting wires of the cathode rod 3 are laid on the windward side of the stealth grid 1; the connecting wires of the anode rod 4 are laid on the leeward side of the stealth grid 1. This separate wiring arrangement for the cathode rod 3 and anode rod 4 aims to minimize the probability of short circuits and improve the operational reliability of the plasma generation assembly.

[0021] The distance between the negative electrode rod 3 and the positive electrode rod 4 shall not be less than 2 / 3 of the side length of the grid hole 2. If the distance is too small, the area of ​​the grid hole 2 covered by the plasma generated between the negative electrode rod 3 and the positive electrode rod 4 will be too small, thus affecting the stealth effect of the aircraft's air intake.

[0022] The negative electrode rod 3 and the positive electrode rod 4 are connected to the plasma generator via connecting wires. The plasma generator is installed inside the aircraft and is a voltage and frequency adjustable plasma generator.

[0023] In this embodiment, the side length of the stealth grille 1 is 242mm, the side length of the grille hole 2 is 13mm, the distance between the negative electrode rod 3 and the positive electrode rod 4 is 10mm, and the wall thickness of the stealth grille 1 is 2mm.

[0024] A stealth method for an aircraft air intake, employing the aforementioned stealth structure, specifically involves: when the aircraft air intake requires stealth, a plasma generator is activated, energizing the negative electrode rod 3 and the positive electrode rod 4, generating high-energy plasma between them. This high-energy plasma mixes with a high-speed free flow to form a high-energy plasma airflow. Simultaneously, the high-energy plasma airflows formed within each grid hole 2 further merge and superimpose, forming high-energy plasma clusters distributed within the stealth grid 1 and the air intake. Stealth of the air intake is achieved through these high-energy plasma clusters. Furthermore, by adjusting the voltage and frequency of the plasma generator, the intensity and magnitude of the high-energy plasma generated between the negative electrode rod 3 and the positive electrode rod 4 are adjusted to modify the stealth effect of the air intake.

[0025] The solutions in the embodiments are not intended to limit the scope of protection of the present invention. All equivalent implementations or modifications that do not depart from the present invention are included in the scope of protection of the present invention.

Claims

1. A stealth structure for an aircraft air intake, characterized in that: It includes a stealth grille and a plasma generating assembly; the stealth grille is fixedly installed at the air intake of the aircraft's air intake duct; the plasma generating assembly is disposed within the grille openings of the stealth grille; the plasma generating assembly includes a cathode electrode and a cathode electrode, which are distributed in parallel.

2. The stealth structure for an aircraft air intake according to claim 1, characterized in that: The plane containing the stealth grille has an angle relative to the vertical plane, ranging from 20° to 30°.

3. The stealth structure for an aircraft air intake according to claim 1, characterized in that: The connecting wires of the negative electrode rod are laid on the windward side of the stealth grid; the connecting wires of the positive electrode rod are laid on the leeward side of the stealth grid.

4. The stealth structure for an aircraft air intake according to claim 1, characterized in that: The distance between the negative electrode rod and the positive electrode rod is not less than 2 / 3 of the side length of the grid hole.

5. The stealth structure for an aircraft air intake according to claim 1, characterized in that: The negative electrode rod and the positive electrode rod are connected to the plasma generator via connecting wires. The plasma generator is installed inside the aircraft and is a voltage and frequency adjustable plasma generator.

6. A stealth method for an aircraft air intake, employing the stealth structure for an aircraft air intake as described in claim 1, characterized in that, Specifically, when the aircraft's air intake needs to be stealthy, the plasma generator is activated, and the cathode and anode rods are energized, generating high-energy plasma between them. This high-energy plasma mixes with the high-speed free flow to form a high-energy plasma airflow. Simultaneously, the high-energy plasma airflows formed within each grid opening further merge and superimpose, forming high-energy plasma clusters distributed within the stealth grids and the air intake. The stealth of the air intake is achieved through these high-energy plasma clusters. Furthermore, by adjusting the voltage and frequency of the plasma generator, the intensity and size of the high-energy plasma generated between the cathode and anode rods can be adjusted to alter the stealth effect of the air intake.

Images