机翼对螺旋桨发动机旋转颤振的影响研究
收稿日期: 2015-12-11
修回日期: 2016-01-05
网络出版日期: 2016-01-22
基金资助
国家自然科学基金（11472216）；高等学校学科创新引智计划（B07050）
Effect of wing on whirl flutter of propeller engine
Received date: 2015-12-11
Revised date: 2016-01-05
Online published: 2016-01-22
Supported by
National Natural Science Foundation of China (11472216); The "111" Project of China (B07050)
陈兆林 , 杨智春 , 谷迎松 . 机翼对螺旋桨发动机旋转颤振的影响研究[J]. 航空学报, 2016 , 37(11) : 3351 -3360 . DOI: 10.7527/S1000-6893.2016.0008
In order to investigate the effects of wing on whirl flutter of propeller engine and reveal the underlying mechanism, the whirl flutter speed of the nacelle-propeller system and the wing-nacelle-propeller system under different structure parameters is analyzed. The strip theory is applied to calculate the aerodynamic loading of the propeller, and a method developed from MSC. Nastran is used to accomplish whirl flutter analysis. The results indicate that, the elasticity of wing structure can significantly decrease the natural frequency of engine's pitch mode, and slightly decrease the natural frequency of engine's yaw mode. This could change the difference between the natural frequencies of both modes. The degree of coupling between engine's pitch mode and yaw mode would then be influenced to cause the change in whirl flutter speed. In the case of tight coupling between the motion of the engine and the wing surface, the aerodynamic loading of the wing surface can significantly increase the whirl flutter speed of the engine.
Key words： whirl flutter; effect mechanism; mode coupling; wing; propeller
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