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.
本发明涉及一种航发试车蜂巢降噪导流屏及使用方法,步骤如下:将导流屏通过螺栓植筋的形式固定在场地上;将飞机牵引到U状的导流屏内,机头朝向U状的导流屏外,机尾朝向U状的导流屏内屏体;启动飞机发动机,发动机气流并携带噪声冲击导流屏屏体,并进入导流屏面上的数个降噪导流杯内,气流进入降噪导流杯弧形状杯底内部形成气流反冲,在导流屏表面形成一层气垫;后续的发动机气流冲击到气垫上面,产生中和气流,随着蜂巢降噪导流屏主体弧形面改变方向,由水平气流导向为向上流动的气流,气流通过导流屏顶部的羽翼降噪导流板流出,有效的提高对气流的导流速率,极大降低噪声,起到对气流导向,噪声治理的双重效果。
Aircraft engine test run honeycomb noise reduction flow guide screen and using method
一种航发试车蜂巢降噪导流屏及使用方法
2020-09-08
Patent
Elektronische Ressource
Chinesisch
IPC: | B64F GROUND OR AIRCRAFT-CARRIER-DECK INSTALLATIONS SPECIALLY ADAPTED FOR USE IN CONNECTION WITH AIRCRAFT , Boden- oder Flugzeugträgerdeckeinrichtungen besonders ausgebildet für die Verwendung in Verbindung mit Luftfahrzeugen |
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