摘要
通过求解雷诺平均Navier-Stokes(N-S)方程并采用影响系数法,对三个基本正交模态的三维振荡跨声风扇叶片绕流问题进行了研究,基于刚体运动假设和模态叠加法,得到了可用于叶轮机械设计阶段颤振稳定性评估的稳定性参数图.结果表明,跨声风扇内部,激波对非定常气动力的分布具有主导作用;在一定情况下振型对颤振稳定性有重要影响,应将其作为颤振稳定性设计的重要参数之一;跨声风扇和亚声低压涡轮的稳定性参数图对比分析表明,两者稳定性参数分布形式具有相似性.
Numerical simulation of three-dimensional unsteady viscous flow around oscillating transonic fan was carried out in the influence coefficient domain with one blade oscillating in various three-dimensional rigid-body modes. Then the stability parameter map was gotten based on the assumption of rigid body mode and mode superposition method. The main result of this paper is that, the shock wave has dominant contribution on the unsteady aerodynamic force, mode shape has an important effect on flutter stability, and the stability parameter of transonic fan and subsonic low pressure turbine has similar pattern.
出处
《航空动力学报》
EI
CAS
CSCD
北大核心
2010年第3期537-548,共12页
Journal of Aerospace Power
基金
国家重点基础研究发展973计划(2007CB210103)
关键词
颤振
稳定性参数
振荡叶栅
影响系数法
跨声风扇
flutter
stability parameter
oscillating cascade
influence coefficient method
transonic fan
