Imperial College London
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ProfessorJonathanMorrison

Faculty of Engineering, Department of Aeronautics

Professor of Experimental Fluid Mechanics
 
 
 
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Contact

 

+44 (0)20 7594 5067j.morrison Website

 
 
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Location

 

CAGB315City and Guilds BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Brackston:2018:10.1016/j.ijheatfluidflow.2018.03.015,
author = {Brackston, RD and Wynn, A and Morrison, JF},
doi = {10.1016/j.ijheatfluidflow.2018.03.015},
journal = {International Journal of Heat and Fluid Flow},
pages = {127--136},
title = {Modelling and feedback control of vortex shedding for drag reduction of a turbulent bluff body wake},
url = {http://dx.doi.org/10.1016/j.ijheatfluidflow.2018.03.015},
volume = {71},
year = {2018}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Three-dimensional bluff body wakes are of key importance due to their relevance to the automotive industry. Such wakes have both large pressure drag and a number of coherent flow structures associated with them. Depending on the geometry, these structures may include both a bistability resulting from a spatial symmetry breaking (SB), and a quasi-periodic vortex shedding. The authors have recently shown that the bistability may be modelled by a Langevin equation and that this model enables the design of a feedback control strategy that efficiently reduces the drag through suppression of asymmetry. In this work the stochastic modelling approach is extended to the vortex shedding, capturing qualitatively both the forced and unforced behaviour. A control strategy is then presented that makes use of the frequency response of the wake, and aims to reduce the measured fluctuations associated with the vortex shedding. The strategy proves to be effective at suppressing fluctuations within specific frequency ranges but, due to amplification of disturbances at other frequencies, is unable to give drag reduction.
AU  - Brackston,RD
AU  - Wynn,A
AU  - Morrison,JF
DO  - 10.1016/j.ijheatfluidflow.2018.03.015
EP  - 136
PY  - 2018///
SN  - 0142-727X
SP  - 127
TI  - Modelling and feedback control of vortex shedding for drag reduction of a turbulent bluff body wake
T2  - International Journal of Heat and Fluid Flow
UR  - http://dx.doi.org/10.1016/j.ijheatfluidflow.2018.03.015
UR  - http://hdl.handle.net/10044/1/58658
VL  - 71
ER  -
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