Aircraft engine test run honeycomb noise reduction flow guide screen and using method

Abstract

The invention relates to an aircraft engine test run honeycomb noise reduction flow guide screen and a using method. The using method comprises the following steps that a flow guide screen is fixed toa site in a bolt bar planting mode; an aircraft is dragged into the U-shaped flow guide screen, the nose is arranged to face the outside of the U-shaped flow guide screen, and the tail is arranged toface the inner screen body of the U-shaped flow guide screen; an aircraft engine is started, airflow of the engine impacts the flow guide screen body with noise and enters a plurality of noise reduction flow guide cups on the surface of the flow guide screen, the airflow enters arc-shaped cup bottoms of the noise reduction flow guide cups to form airflow recoil, and a layer of air cushion is formed on the surface of the flow guide screen; subsequent engine airflow impacts the air cushion, and neutralized airflow is generated; the direction of the neutralized airflow is changed along with thearc-shaped surface of a honeycomb noise reduction flow guide screen main body, horizontal airflow is guided into upward flowing airflow, and the airflow flows out through a wing noise reduction flow guide plate at the top of the flow guide screen, so that the flow guide rate of the airflow is effectively improved, the noise is greatly reduced, and the double effects of airflow guide and noise treatment are achieved.

Description

technical field [0001] The invention relates to a honeycomb noise-reducing air deflector and a method for using it, and is a air deflector for reducing the noise of a test run during a high-thrust test run on the ground of an aircraft. Background technique [0002] There are two main structures of the deflector screen used to reduce the noise of the test run during the high-thrust test run on the ground of the existing aircraft: [0003] One is that the diversion screen is a reinforced concrete structure as a whole, which only has a certain flow diversion function, but has no noise reduction function. The construction period for completing the diversion screen is long, and there is a lot of construction waste, so the relocation cannot be realized. [0004] Another type of deflector adopts a steel structure as the main structure. Part of the wall panel is made of microporous panels, and the rear part is filled with sound-absorbing cotton and sound-absorbing materials. The bac...

AI Technical Summary

Problems solved by technology

[0011] In view of the practical problems existing in the current mainstream structure of the guide screen, the present invention provides a honeycomb noise-reducing guide screen for the aviation engine test run and its use method. The modular unit is screwed and assembled, and the structural form is used to divert air and reduce noise, which solves various problems existing in the current diversion screen, greatly improves the noise reduction ability and diversion level, and can be used for secondary migration, greatly reducing the cost of use

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