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Digital Library of the
European Council for Modelling and Simulation |
Title: |
Effect Of Turbulence Intensity On Vortex Formation Threshold In A
Jet Engine Test Cell |
Authors: |
Wei Hua Ho, Mark Jermy |
Published in: |
(2011).ECMS
2011 Proceedings edited by: T. Burczynski, J. Kolodziej, A. Byrski, M.
Carvalho. European Council for Modeling and Simulation. doi:10.7148/2011 ISBN:
978-0-9564944-2-9 25th
European Conference on Modelling and Simulation, Jubilee Conference Krakow,
June 7-10, 2011
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Citation
format: |
Ho, W. H., & Jermy, M. (2011).
Effect Of Turbulence Intensity On Vortex Formation Threshold In A Jet Engine
Test Cell. ECMS 2011 Proceedings edited by: T. Burczynski, J. Kolodziej, A.
Byrski, M. Carvalho (pp. 231-236). European Council
for Modeling and Simulation. doi:10.7148/2011-0231-0236 |
DOI: |
http://dx.doi.org/10.7148/2011-0231-0236 |
Abstract: |
Vortical
structures can develop in the intakes of aircraft engines during operation in
the proximity of solid surfaces. Take-off and testing in a ground facility
are clear examples of such scenarios. When such a vortex is formed and
ingested into the engine, potentially catastrophic damage can occur. The
vortex can cause the compressor to stall, resulting in severe damage to the
engine. Procedures
have been put in place to prevent such damage from occurring on the runway.
However to prevent such vortices from forming, especially in the test cells,
it is necessary to be able to predict the onset of the vortex or at least to
understand the factors affecting the formation of such vortices. This
paper extends the scope of previous investigations by investigating the
effects that increasing upstream turbulence intensity has on the vortex
formation threshold. The results show that an increase
in upstream turbulence intensity increases the range of conditions over which
a vortex forms. All three regimes show signs of shifting the threshold of
vortex formation to lower ratio of inlet velocity over upstream average
velocity (Vi/Vo) for a given ratio of inlet height over inlet diameter
(H/Di). |
Full
text: |