High-performance subsonic speed air inlet duct integrated with inner auxiliary air inlet duct

Abstract

The invention provides a high-performance subsonic speed air inlet duct integrated with an inner auxiliary air inlet duct. The high-performance subsonic speed air inlet duct integrated with the inner auxiliary air inlet duct comprises a main air inlet duct and the auxiliary air inlet duct. The main air inlet duct can be an S-shaped bent air inlet duct or an embedded type air inlet duct. The bottom edge of an inlet of the S-shaped bent air inlet duct is attached to the surface of a machine body. An inlet of the embedded type air inlet duct is fully integrated with the surface of the machine body. An inner channel of the auxiliary air inlet duct is communicated with an aircraft environment control system or a cabin air guiding channel. The auxiliary air inlet duct is arranged in an inner channel of the main air inlet duct in an integrated mode. By the adoption of the high-performance subsonic speed air inlet duct integrated with the inner auxiliary air inlet duct, the independently arranged auxiliary air inlet duct and a boundary layer partition channel on the machine body can be eliminated, so that the aerodynamic resistance of an aircraft is reduced, and the stealth performance of a radar of the aircraft is improved; in addition, through mutual cooperation between a plurality of groups of miniature eddy generators and auxiliary inlets in the inner channel, low-energy air flow in the main air inlet duct can be gathered and supplied to the auxiliary air inlet duct to be used, as a result, the total pressure recovery coefficient of the main air inlet duct is remarkably increased, and the flow distortion performance of the main air inlet duct is remarkably improved.

Description

technical field [0001] The invention relates to the field of aircraft design, in particular to a subsonic air inlet. Background technique [0002] Subsonic aircraft is the most common and widely used type of air-breathing aircraft. The inlets of its power system generally have pitot-type inlets, S-curved inlets, buried inlets, etc. . Considering factors such as engine installation, aerodynamic interference, additional aerodynamic resistance, and radar stealth, the application of S-curved inlets and buried inlets on modern advanced subsonic aircraft is becoming more and more common. [0003] Please combine figure 1 and figure 2 As shown, the S-curved air intake is an air intake with an S-shaped inner channel, which can guide the external airflow to the inside of the aircraft body and serve the overall layout of the engine completely submerged in the aircraft body. Compared with the Pitot-type inlet, the S-curved inlet induces more than two pairs of vortices due to the ex...

AI Technical Summary

Problems solved by technology

Since they belong to different subsystems of the aircraft, the auxiliary air inlet is usually designed separately from the main air inlet, and the air is bleed through the air inlet which is specially designed and independently arranged in other parts of the airframe, which will lead to a certain aerodynamic resistance, which is harmful to the aircraft. The radar stealth performance of the

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