Continuously adjustable air intake duct deflation device

Abstract

The invention discloses a continuously adjustable air intake duct deflation device. According to the device, a plurality of deflation grooves located in the inner side of a compression face are formed in a front body of an air intake duct, and the two sides of each deflation groove communicate with the outside of the air intake duct; and an opening penetrating through the compression face is formed between the deflation grooves and the compression face and communicates with the deflation grooves. The device further comprises a driving module, wherein the driving module comprises a motor located in an inner cavity and blades located in the deflation grooves, and the blades open or close the deflation grooves through rotation. The air intake duct deflation device is simple in structure, the deflation amount is continuously adjustable, and interference of dead points is avoided; the deflation device is small and exquisite in structure and suitable for a narrow space; the flexibility is high, adjustment within different angle ranges can be carried out only by changing the length of a kinematic pair without a special requirement on the rotating direction; and due to the fact that the rotating angle of the motor can be known, the rotating angle of the blades can be known without an additional sensor for monitoring the rotating angle of the blades.

Description

technical field [0001] The invention relates to the field of hypersonic inlet aerodynamic experiments, in particular to a continuously adjustable inlet deflation device. Background technique [0002] As one of the key components of the aircraft, the performance of the hypersonic inlet directly affects the propulsion efficiency of the propulsion system and even the overall performance of the aircraft. However, the low Mach number of the hypersonic inlet has a poor starting ability, which limits the capability of the aircraft. Therefore, the aircraft must use other power devices at low Mach numbers. This not only makes the structure more complex, but also affects the cost of hypersonic flight. [0003] Generally, the methods for reducing the starting Mach number of the intake port can be divided into two categories: variable geometry methods and other methods under fixed geometry conditions. Because the performance of the conventional fixed-geometry inlet varies greatly unde...

AI Technical Summary

Problems solved by technology

This scheme integrates the inner pressure section of the encircled city inlet on the lower surface of the aircraft, the throat and the casing of the combustion chamber as a whole, which has a great impact on the overall design of the aircraft and is difficult to achieve in practical applications.

(4) New adjustment technology, including flexible adjustable inlet technology and memory alloy adjustment scheme, which has strong potential in aviation, but also has problems such as poor high temperature resistance and slow response speed in engineering applications

However, the space of hypersonic vehicles is very limited, the working environment is harsh, and there are strong geometric constraints on the shape and operating range of the rotating me...

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