大迎角耦合运动非定常空气动力特性

The unsteady aerodynamic characteristics of coupled motion at high angle of attack

采用某飞机大迎角大振幅运动风洞实验结果,分析了大迎角非定常空气动力的一些特性。结果表明,飞机机动飞行时多自由度运动的气动特性比单自由度运动复杂,耦合运动时的气动特性和两个单自由度运动的气动特性的叠加结果相比有一定差别。此外,旋转天平实验结果同本实验的结果相比差别较大。

Some of the unsteady aerodynamic characteristics were analyzed using the wind tunnel test results for a fighter model couple motion at high angle of attack in this paper. The results showed that the aerodynamic characteristics of multi-degree of freedom motion were more complicated than that of single degree of freedom. There were some differences on the aerodynamic characteristics between the test results of coupled motion and the linear superposition results of two single degree of freedom motions. In addition, compared with rotary balance testing, the resuits of the test in the paper showed a greater difference.