Imperial College London
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Professor Emile S Greenhalgh

Faculty of Engineering, Department of Aeronautics

Professor of Composite Materials
 
 
 
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Contact

 

+44 (0)20 7594 5070e.greenhalgh CV

 
 
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Location

 

334City and Guilds BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Nguyen:2019:10.1017/aer.2019.15,
author = {Nguyen, S and Corey, M and Chan, W and Greenhalgh, ES and Graham, JMR},
doi = {10.1017/aer.2019.15},
journal = {The Aeronautical Journal},
pages = {678--705},
title = {Experimental determination of the aerodynamic coefficients of spinning bodies},
url = {http://dx.doi.org/10.1017/aer.2019.15},
volume = {123},
year = {2019}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - To accurately predict the probabilities of impact damage to aircraft from runway debris, it is important to understand and quantify the aerodynamic forces that contribute to runway debris lofting. These lift and drag forces were therefore measured in experiments with various bodies spun over a range of angular velocities and Reynolds numbers. For a smooth sphere, the Magnus effect was observed for ratios of spin speed to flow speed between 0.3 and 0.4, but a negative Magnus force was observed at high Reynolds numbers as a transitional boundary layer region was approached. Similar relationships between lift and spin rate were found for both cube- and cylinder-shaped test objects, particularly with a ratio of spin speed to flow speed above 0.3, which suggested comparable separation patterns between rapidly spinning cubes and cylinders. A tumbling smooth ellipsoid had aerodynamic characteristics similar to that of a smooth sphere at a high spin rate. Surface roughness in the form of attached sandpaper increased the average lift on the cylinder by 24%, and approximately doubled the lift acting on the ellipsoid in both rolling and tumbling configurations.
AU  - Nguyen,S
AU  - Corey,M
AU  - Chan,W
AU  - Greenhalgh,ES
AU  - Graham,JMR
DO  - 10.1017/aer.2019.15
EP  - 705
PY  - 2019///
SN  - 0001-9240
SP  - 678
TI  - Experimental determination of the aerodynamic coefficients of spinning bodies
T2  - The Aeronautical Journal
UR  - http://dx.doi.org/10.1017/aer.2019.15
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000474255300007&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - http://hdl.handle.net/10044/1/86859
VL  - 123
ER  -
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