加装格尼襟翼的旋翼机配平及稳定性研究

Trim and stability characteristics of an autogyro equipped with Gurney flaps

以某型自转旋翼机为对象,研究了格尼襟翼对自转旋翼机飞行动力学特性的影响。通过数值计算得到自转旋翼二维翼型加装格尼襟翼的气动力系数,采用叶素理论并结合动态入流理论建立自转旋翼动力学模型,在此基础上建立了旋翼机加装格尼襟翼的飞行动力学模型。研究表明,格尼襟翼对自转旋翼机的纵向配平特性有较大影响,纵向周期变距操纵量增大,旋翼稳定转速减小;格尼襟翼基本不影响全机稳定性,同时还能够达到减小功率消耗的效果。

This paper studies the influence of Gurney flaps （GF） on flight dynamics characteristics of au- togyro, taking a certain autogyro as object. Aerodynamic coefficients of rotor airfoil equipped with GF are calculated by numerical method. Flight dynamics model of autogyro with gurney flaps was established based on autorotation rotor dynamics modeled, which modeling by blade element theory coupled with dy- namic inflow theory. The result shows that GF has a great influence on longitudinal trim eharacteristics of autogiro. GF increases the amount of longitudinal pitch control and decreases the steady rotary speed of autogyro. GF almost does not influence the stability of autogiro, and meanwhile, GF can also reduce the power consumption, which is in favor of flight performance.