跨音轴流风扇叶片气弹稳定性研究

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振动与冲击 ›› 2011, Vol. 30 ›› Issue (7) : 35-39,8.

论文

跨音轴流风扇叶片气弹稳定性研究

赵瑞勇; 杨慧; 王延荣

作者信息 +

Rearch on aeroelastic stability of the transonic axial compressor fan blade

Zhao rui-yong; Yang hui; Wang yan-rong

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文章历史 +

摘要

基于弱耦合的能量法原理，对近失速工况下NASA 67跨音风扇叶片进行了气弹稳定性分析。本文发展的三维线性插值方法为CSD/CFD数据交换提供了基础。采用FLUENT动网格技术，实现了振动叶片绕流计算。数值模拟了NASA 67叶片前三阶模态振型激励下的非定常气动响应。通过分析叶片表面非定常气动力和振动位移之间的相位差发现：该相位差的存在决定了非定常气动力做功的正、负。由叶片表面非定常压力分析结果得出近失速工况下，叶片的气动弹性稳定性受叶片模态振型和激波的影响较为显著。

Abstract

The aeroelastic stability of the NASA 67 transonic fan blade is predicted by using the energy method at the near stall condition. The CSD/CFD data transfer is based on the improved 3D linear interpolation method. The FLUENT dynamic mesh technology is used in the simulation of unsteady flow around the oscillating blade. The unsteady aerodynamics of NASA 67 blade with excitation of the first three modes is studied. It is found that the phase angle between unsteady aerodynamic forces and vibration displacements decides the unsteady aerodynamic force do positive or negative work. The analysis of unsteady surface pressures yields that the mode shape and the shock are the most important factors on the aeroelastic stability of the rotor blade.

导出引用

赵瑞勇;杨慧;王延荣. 跨音轴流风扇叶片气弹稳定性研究[J]. 振动与冲击, 2011, 30(7): 35-39,8

Zhao rui-yong;Yang hui; Wang yan-rong. Rearch on aeroelastic stability of the transonic axial compressor fan blade[J]. Journal of Vibration and Shock, 2011, 30(7): 35-39,8