Fluctuating Lift Forces on Aerofoils Moving Through Transverse and Chordwise Gusts

[+] Author and Article Information
J. H. Horlock

Engineering Department, Cambridge University, Cambridge, England

J. Basic Eng 90(4), 494-500 (Dec 01, 1968) (7 pages) doi:10.1115/1.3605173 History: Received February 07, 1968; Online November 03, 2011


An analysis is given for determining the lift fluctuation on an aerofoil due to a gust parallel to the undisturbed flow. By combining the new analysis with an established theory for “transverse” gusts perpendicular to the undisturbed flow, it is possible to obtain the fluctuating lift on a rotating fan or compressor blade moving through a flow disturbance. It is shown that simple design rules may be derived for fans and compressors if the fluctuating lift forces, and possibly therefore the associated noise, are to be reduced.

Copyright © 1968 by ASME
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