Imperial College London
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Professor Mehdi Vahdati

Faculty of Engineering, Department of Mechanical Engineering

Principal Research Fellow
 
 
 
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Contact

 

+44 (0)20 7594 7073m.vahdati

 
 
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Location

 

606City and Guilds BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Zhao:2017:10.1115/1.4035567,
author = {Zhao, F and Smith, N and Vahdati, M},
doi = {10.1115/1.4035567},
journal = {Journal of Turbomachinery},
pages = {1--10},
title = {A simple model for identifying the flutter bite of fan blades},
url = {http://dx.doi.org/10.1115/1.4035567},
volume = {139},
year = {2017}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - This paper presents the work on part-speed fan flutter due to acoustic reflections from the intake, commonly called “flutter bite.” A simple model for the prediction of the flutter bite is presented. In a previous work by the authors, it was shown that the acoustic effects of the intake are very important and need to be considered during the design of a fan blade. It was also shown that the contribution to blade aerodamping due to blade motion (for the isolated rotor in an infinitely long duct) and intake acoustics is independent and can be analyzed separately. The acoustic reflections from the intake change the damping of the blade by modifying the phase and amplitude of the unsteady pressure at the leading edge of the fan. It will be shown in the paper that, for a given intake, the phase and amplitude of the reflected acoustic waves can be evaluated analytically based on established theories independent of the fan design. The proposed model requires only the design intent of the fan blade and the geometry of the intake, which are available in the early design stages of a new engine, and can predict the operating conditions at which fan flutter is likely to occur.
AU  - Zhao,F
AU  - Smith,N
AU  - Vahdati,M
DO  - 10.1115/1.4035567
EP  - 10
PY  - 2017///
SN  - 0889-504X
SP  - 1
TI  - A simple model for identifying the flutter bite of fan blades
T2  - Journal of Turbomachinery
UR  - http://dx.doi.org/10.1115/1.4035567
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000399936800003&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - https://asmedigitalcollection.asme.org/turbomachinery/article-abstract/139/7/071003/378855/A-Simple-Model-for-Identifying-the-Flutter-Bite-of
VL  - 139
ER  -
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