期刊
INTERNATIONAL JOURNAL OF TURBOMACHINERY PROPULSION AND POWER
卷 6, 期 3, 页码 -出版社
MDPI
DOI: 10.3390/ijtpp6030026
关键词
non-synchronous vibration; flutter; aeroelastic instability; compressor
资金
- Clean Sky 2 Joint Undertaking (JU), project CATANA [864719]
- European Union
- EPSRC [EP/R004951/1]
This paper investigates non-synchronous vibrations by casting a reduced model in the frequency domain and analyzing stability for a range of parameters. It is shown how linear models can capture phenomena traditionally associated with aerodynamic nonlinearities under certain conditions. The study highlights the differences between convective non-synchronous vibrations and flutter, and identifies necessary modifications for quantitative predictions.
Non-synchronous vibrations arising near the stall boundary of compressors are a recurring and potentially safety-critical problem in modern aero-engines. Recent numerical and experimental investigations have shown that these vibrations are caused by the lock-in of circumferentially convected aerodynamic disturbances and structural vibration modes, and that it is possible to predict unstable vibration modes using coupled linear models. This paper aims to further investigate non-synchronous vibrations by casting a reduced model for NSV in the frequency domain and analysing stability for a range of parameters. It is shown how, and why, under certain conditions linear models are able to capture a phenomenon, which has traditionally been associated with aerodynamic non-linearities. The formulation clearly highlights the differences between convective non-synchronous vibrations and flutter and identifies the modifications necessary to make quantitative predictions.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据