静子尾迹对转子叶片气弹稳定性的影响

Influence of stator wake on aeroelasticity of rotor blade

基于相位延迟方法,发展了一种可考虑前排静子尾迹对转子叶片气弹稳定性影响的能量法,并利用时间推进法对该方法进行了验证。对比分析了叶片不同模态和叶间相位角下,尾迹对转子叶片气动阻尼的影响。结果表明:尾迹对转子叶片气弹稳定性的影响显著,所发展的方法可准确、高效地对其进行模拟。与一阶扭转模态相比,尾迹对转子叶片一阶弯曲模态的气动阻尼影响更大;在不同叶间相位角下,尾迹使一阶弯曲模态的低气动阻尼进一步降低,使高气动阻尼有所增大,而对于一阶扭转模态,其影响则相反。

An energy method was proposed to consider the effect of the wake induced by the upstream stator on the aeroelasticity of the rotor blade based on the phase lagged method,and then validated by the time-marching method.The effects of wake on aerodynamic damping of rotor blades under different modes and interblade phase angles were investigated.The results showed that the wake had a significant effect on the aeroelasticity of the rotor blades,and can be simulated by the developed method accurately and efficiently.Compared with the first torsional mode,the wake had a more serious impact on the aeroelasticity of the first bending mode.Furthermore,for different interblade phase angles,the wake can weaken the low aerodynamic damping and strengthen the high damping for the first bending mode,in contrast to the first torsion mode.