旋转流场下飞机大幅滚转振荡时的动态横向气动特性实验研究

在气动院FL-8风洞中,采用旋转流场下单自由度振荡机构进行了旋转流场下大幅滚转运动的动态气动特性实验研究.模型在绕风轴连续旋转的同时进行给定频率和振幅绕体轴的滚转振荡运动,测量了模型的动态气动特性,着重分析了不同运动参数对模型气动特性的影响.结果表明,旋转速度的存在使大幅滚转振荡试验中的滚转力矩和偏航力矩发生平移,同时使滚转力矩和偏航力矩的迟滞特性发生明显的变化.

Investigation of unsteady aerodynamic characteristics for the large amplitude rolling under rotary flow field

The large amplitude rolling motion test was conducted in FL-8 low speed wind tunnel of CARIA.The test set is a single freedom oscillating apparatus in rotary flow field.The six-component unsteady aerodynamic was measured when the model rotating around wind-axis and coupling the roll oscillating around body-axis.The unsteady aerodynamics characteristic of model is analyzed at different motion parameters.The results show that the rolling moment and the yawing moment is shifted on account of rotary motion,at the same time the aerodynamic characteristics of the hysteresis loops was changed obviously about roll moment and yaw moment.