The invention relates to a helicopter rotor vortex ring state modification test ground simulation method, and belongs to the technical field of wind tunnel tests. The invention is mainly based on a domestic F5m vertical wind tunnel and a helicopter vertical lifting test bench developed in cooperation with the domestic F5m vertical wind tunnel. The invention firstly provides a test method for simulating vortex ring modification by quickly pulling up the total pitch of the rotor when the helicopter rotor is in a vortex ring state, so that the test process is standardized. According to the obtained change rule of the aerodynamic characteristics of the rotor wing before and after the vortex ring is changed, some meaningful results can be obtained to guide a pilot to timely and safely change the rotor wing after the rotor wing enters the vortex ring state.
本发明涉及一种直升机旋翼涡环状态改出试验地面模拟方法,属于风洞试验技术领域;本发明主要基于国内F5米立式风洞及其配套研制的直升机垂直升降试验台,率先提出一种当直升机旋翼处于涡环状态时,通过旋翼总距的快速拉起,模拟涡环改出的试验方法,使得试验流程规范化,根据获得的涡环改出前后旋翼气动特性的变化规律,可以取得一些有意义的成果,用以指导飞行员在旋翼进入涡环状态后如何及时安全改出。
Helicopter rotor vortex ring state modification test ground simulation method
一种直升机旋翼涡环状态改出试验地面模拟方法
2021-08-13
Patent
Electronic Resource
Chinese
IPC: | G01M TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES , Prüfen der statischen oder dynamischen Massenverteilung rotierender Teile von Maschinen oder Konstruktionen / 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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