An adaptive wave-absorbing and fluid-guiding device for aero engines

Abstract

This invention discloses an adaptive wave-absorbing and flow-guiding device for aero-engines, comprising a casing made of wave-absorbing composite material, a wave-absorbing inner ring concentrically arranged with the casing, multiple adjustable wave-absorbing blades distributed circumferentially along the casing, a conical fairing disposed at the leading edge of the wave-absorbing inner ring, and an actuation mechanism. The adjustable wave-absorbing blades include an adjustable leading edge made of metal and an adjustable trailing portion made of wave-absorbing composite material. The leading edge of the adjustable wave-absorbing blade is fixedly disposed between the casing and the wave-absorbing inner ring, while the trailing portion is movably disposed between the casing and the wave-absorbing inner ring. The actuation mechanism is used to adjust the angle between the trailing portion of the adjustable wave-absorbing blade and the incoming flow. This adaptive wave-absorbing and flow-guiding device for aero-engines achieves the dual functions of regulating the inlet airflow and wave-absorbing efficiency, reducing the complexity of the aero-engine system and thus improving its operational reliability.

Description

Technical Field

[0001] This invention relates to the field of aero-engine design technology, and in particular to an adaptive wave-absorbing fluid guide device for aero-engines. Background Technology

[0002] Aircraft engines typically have guide vanes at their inlets to regulate airflow. Additionally, to reduce radar cross-section and ensure stealth performance, radar-absorbing guides are usually installed a short distance behind the air intake and before the engine inlet. However, the installation of these radar-absorbing guides increases the complexity of the aircraft engine system and reduces its reliability. Furthermore, the operating state of these guides is passive and unadjustable, making it impossible to adjust their radar absorption efficiency. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide an adaptive wave-absorbing fluid guide device for aero-engines, which can realize the dual functions of regulating the inlet airflow of aero-engines and regulating wave-absorbing efficiency.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] An adaptive wave-absorbing and flow-guiding device for an aero-engine includes a casing made of wave-absorbing composite material, a wave-absorbing inner ring concentrically arranged with the casing, a plurality of adjustable wave-absorbing blades distributed circumferentially along the casing, and a conical fairing disposed at the leading edge of the wave-absorbing inner ring. The adjustable wave-absorbing blades include an adjustable wave-absorbing blade leading edge made of metal material and an adjustable wave-absorbing blade rear part made of wave-absorbing composite material. The adjustable wave-absorbing blade leading edge is fixedly disposed between the casing and the wave-absorbing inner ring, and the adjustable wave-absorbing blade rear part is movably disposed between the casing and the wave-absorbing inner ring. The adaptive wave-absorbing and flow-guiding device for an aero-engine also includes an actuation mechanism for adjusting the angle between the rear part of the adjustable wave-absorbing blade and the incoming flow.

[0006] Preferably, the rear end of the adjustable absorbing blade is connected to the inner absorbing ring and is provided with a rotating shaft. The outer side of the inner absorbing ring is provided with a plurality of rotating shaft insertion holes distributed circumferentially. The actuation mechanism drives the rotating shaft to rotate to adjust the angle between the rear of the adjustable absorbing blade and the incoming flow.

[0007] Preferably, the head of the conical fairing is provided with multiple de-icing gaps.

[0008] Preferably, the adjustable absorbing blade has multiple de-icing gaps at its leading edge.

[0009] The beneficial technical effects of the present invention are as follows: The above-mentioned adaptive wave-absorbing guide device for aero-engines can adjust the angle between the rear of the adjustable wave-absorbing blade and the incoming flow through the actuation mechanism, realizing the dual functions of regulating the inlet airflow of the aero-engine and regulating the wave-absorbing efficiency. This adaptive wave-absorbing guide device can replace the guide blades used to regulate airflow and the wave-absorbing guides used to absorb radar electromagnetic waves in the prior art, reducing the number of components in the aero-engine system, reducing the complexity of the aero-engine system, and thus improving the operational reliability of the aero-engine system. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the adaptive wave-absorbing and fluid-guiding device of the present invention;

[0011] Figure 2 This is a schematic diagram of the adjustable absorbing blade of the present invention;

[0012] Figure 3 This is a schematic diagram of the conical fairing of the present invention;

[0013] Figure 4 This is a schematic diagram of the assembly of the adaptive wave-absorbing fluid guide device of the present invention on an aero-engine. Detailed Implementation

[0014] To enable those skilled in the art to more clearly understand the purpose, technical solution, and advantages of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0015] like Figure 1-2 As shown, in one embodiment of the present invention, the adaptive wave-absorbing and fluid-guiding device includes a housing 10, a wave-absorbing inner ring 20 concentrically arranged with the housing 10, a plurality of adjustable wave-absorbing blades 30 distributed circumferentially along the housing 10, a conical fairing 40 disposed at the leading edge of the wave-absorbing inner ring 20, and an actuation mechanism.

[0016] The conical fairing 40 is made of metal, which can protect against bird strikes or sand damage. The adjustable absorbing blade 30 includes an adjustable absorbing blade leading edge 31 and an adjustable absorbing blade rear part 32. The adjustable absorbing blade leading edge 31 is fixed between the housing 10 and the inner absorbing ring 20 by welding or bolting. The adjustable absorbing blade leading edge 31 is made of metal, which can protect against bird strikes or sand damage. The adjustable absorbing blade rear part 32 is movably disposed between the housing 10 and the inner absorbing ring 20. The adjustable absorbing blade rear part 32 is located behind the adjustable absorbing blade leading edge 31 and is made of absorbing composite material, which can absorb electromagnetic waves incident on the air intake of the aero-engine. The rear part 32 of the adjustable absorbing blade can be adjusted at the angle with the incoming flow under the drive of the actuation mechanism. On the one hand, it can adjust the airflow at the inlet of the aero-engine, and on the other hand, it can achieve adaptive adjustment of the absorbing efficiency according to the plan.

[0017] like Figure 4 As shown, the adaptive wave-absorbing fluid guide device is installed at the front end of the aero-engine 50. The airflow flows into the aero-engine compressor through the adaptive wave-absorbing fluid guide device. The incident electromagnetic waves are absorbed and attenuated by the rear part 32 of the adjustable wave-absorbing blade, reducing the electromagnetic scattering intensity. When it is necessary to adjust the reduction of electromagnetic scattering intensity, the electromagnetic waves can be better absorbed and attenuated by adjusting the angle between the rear part 32 of the adjustable wave-absorbing blade and the incoming flow. At the same time, the airflow at the aero-engine inlet can be adjusted by adjusting the angle between the rear part 32 of the adjustable wave-absorbing blade and the incoming flow.

[0018] like Figure 2 As shown, in a preferred embodiment of the present invention, a rotating shaft 33 is provided at one end of the adjustable absorbing blade rear portion 32 that connects to the absorbing inner ring 20. The outer side of the absorbing inner ring 20 has multiple circumferentially distributed rotating shaft insertion holes. The rotating shaft 33 is inserted into these holes, thereby connecting the adjustable absorbing blade rear portion 32 to the absorbing inner ring 20. The actuating mechanism drives the rotating shaft 33 to rotate, thereby causing the adjustable absorbing blade rear portion 32 to rotate around the rotating shaft 33, thus adjusting the angle between the adjustable absorbing blade rear portion 32 and the incoming flow.

[0019] like Figure 2 As shown, in a preferred embodiment of the present invention, the leading edge 31 of the adjustable absorbing blade is provided with a plurality of de-icing gaps 34, and the high-temperature airflow from the compressor of the aero-engine flows out from the de-icing gaps 34, which can prevent the adjustable absorbing blade 30 from icing.

[0020] like Figure 3 As shown, in a preferred embodiment of the present invention, the head of the conical fairing 40 is provided with a plurality of de-icing gaps 41, through which high-temperature airflow from the aero-engine compressor flows out, which can prevent the conical fairing 40 from icing.

[0021] In a preferred embodiment of the present invention, the casing 10 is made of a wave-absorbing composite material, which can further reduce the scattering of electromagnetic waves from the air intake.

[0022] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention in any way. Those skilled in the art can make various equivalent changes and improvements based on the above embodiments, and all equivalent variations or modifications made within the scope of the claims should fall within the protection scope of the present invention.

Claims

1. An adaptive wave-absorbing and fluid-guiding device for aero-engines, characterized in that: The adaptive wave-absorbing and flow-guiding device for aero-engines includes a casing made of wave-absorbing composite material, a wave-absorbing inner ring concentrically arranged with the casing, multiple adjustable wave-absorbing blades distributed circumferentially along the casing, and a conical fairing disposed at the leading edge of the wave-absorbing inner ring. The adjustable wave-absorbing blades include an adjustable wave-absorbing blade leading edge made of metal material and an adjustable wave-absorbing blade rear part made of wave-absorbing composite material. The adjustable wave-absorbing blade leading edge is fixedly disposed between the casing and the wave-absorbing inner ring, and the adjustable wave-absorbing blade rear part is movably disposed between the casing and the wave-absorbing inner ring. The adaptive wave-absorbing and flow-guiding device for aero-engines also includes an actuation mechanism for adjusting the angle between the rear part of the adjustable wave-absorbing blade and the incoming flow.

2. The adaptive wave-absorbing and fluid-guiding device for aero-engines as described in claim 1, characterized in that: The adjustable absorbing blade has a rotating shaft at one end connected to the inner absorbing ring. The outer side of the inner absorbing ring has multiple rotating shaft insertion holes distributed circumferentially. The actuation mechanism drives the rotating shaft to rotate to adjust the angle between the rear of the adjustable absorbing blade and the incoming flow.

3. The adaptive wave-absorbing and fluid-guiding device for aero-engines as described in claim 2, characterized in that: The conical fairing head is provided with multiple de-icing gaps.

4. The adaptive wave-absorbing and fluid-guiding device for aero-engines as described in claim 3, characterized in that: The adjustable absorbing blade has multiple de-icing gaps at its leading edge.

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