螺旋桨飞机近地飞行时的横航向稳定性

Lateral Stability of Propeller Aircraft During Low Altitude Flight

摘要:

根据算例飞机数据,分析了地面效应和螺旋桨滑流对飞机横航向静稳定性的影响。结果表明,无论是否存在地面效应,螺旋桨滑流都将使飞机的航向静稳定性和横向静稳定性变差；同时,无论是否存在螺旋桨滑流,地面效应都将使飞机的横向静稳定性增强,航向静稳定性变差。此外,计算了不同飞行条件下的飞机横航向模态特性,分析了地面效应和螺旋桨滑流对飞机横航向动稳定性的影响。结果表明:无论是否存在地面效应,螺旋桨滑流都将增强滚转模态及荷兰滚模态的稳定性,并同时降低螺旋模态的稳定性；而无论是否存在螺旋桨滑流,地面效应总体上也都将使飞机的横航向动稳定性增强。

Abstract:

Based on the sample plane data, the effect of ground effect and propeller slipstream to the lateral stability wasdiscussed, it indicated that no matter ground effect exists the lateral stability of the plane will be decreased by the propel.ler wake, and no matter propeller slipstream existed the lateral stability would be increased and the course stability wouldbe decreased by the ground effect. In addition no matter ground effect existed the rolling mode stability and the Hollandrolling stability would be increased and the vrille stability would be decreased by the propeller air wake, in the same timeno matter propeller wake existed the lateral dynamic stability would be increased by the ground effect.