上下游叶排对压气机转子叶片气动弹性稳定性的影响

使用自行开发的流固耦合程序集，分别考虑压气机上下游叶排的影响对转子叶片气动弹性稳定性进行分析.使用全环气动弹性模型通过叶片在非定常流场中振幅随时间的变化历程计算转子叶片不同振型下的气动阻尼，分析了不同的叶排轴向间距下尾迹和势干扰对气动阻尼的影响规律.通过将考虑转静干涉效应的气动阻尼与单转子的结果作比较，总结了转子-静子结构和导叶-转子结构的干涉作用对转子叶片颤振特性的影响规律.结果表明:对于1阶弯曲模态，转子叶片气动弹性稳定性不随轴向间距单调变化；上游尾迹干涉作用和下游静子势干扰的增强会加剧1阶扭转模态失稳，但是却促进1阶弯扭耦合模态气动弹性稳定. 

Influence of up- and downstream blade rows on aeroelastic stability of compressor rotor blade

Aeroelastic stability analysis of compressor rotor blades, including up- and downstream blade rows interaction, was conducted by self-developed fluid-structure coupled simulation programs. Blade aerodynamic damping values under different vibration modes were calculated through the time trace of the blade vibration amplitude induced by the unsteady flow field, using a whole assembly aeroelastic model. And the influence of wakes and potential waves on the aerodynamic damping values was studied for different axial gaps. Interaction effects on the flutter characteristics of rotor-stator and inlet guide vane-rotor configurations were assessed by comparing the damping data with that of the single rotor. The results show that the aeroelastic stability is not changed monotonically with the axial gap value for the first bending modal. The results also illustrate that the intensified wake and potential wave effects could destabilize the first torsional modal, but stabilize the first bending-torsion coupled modal.