Circulation control wing: Difference between revisions

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Latest revision as of 04:20, 18 March 2025

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A '''circulation control wing''' (CCW) is a form of [[high-lift device]] for use on the main wing of an aircraft to increase the maximum [[lift coefficient]] and reduce the [[stalling speed]]. CCW technology has been in the research and development phase for over sixty years. [[Blown flaps]] were an early example of CCW.<ref name="Circulation Control Wing">{{cite web |url=http://www.sae.org/technical/papers/2005-01-3192 |title= A Propulsion Concept for Circulation Control Wing Technology |accessdate=2024-07-27 |archive-url=https://web.archive.org/web/20080102083136/http://www.sae.org/technical/papers/2005-01-3192 |archive-date=2008-01-02 |url-status=dead |publisher=[[SAE International]]}}</ref>

The CCW works by increasing the velocity of the airflow over the [[leading edge]] and [[trailing edge]] of a specially designed aircraft [[wing]] using a series of blowing slots that eject jets of high-pressure air. The wing has a rounded trailing edge to tangentially eject the air through the [[Coandă effect]] thus causing lift.<ref name="Slomski">{{cite webbook |url=https://arc.aiaa.org/doi/abs/10.2514/6.2006-3011 |title=Large Eddy Simulation of a Circulation Control Airfoil. |accessdate=2024-07-27 |last=Slomski |first=J.F. |date=2006-06-05 |publisher=[[American Institute of Aeronautics and Astronautics]] |doi=10.2514/6.2006-3011 |isbn=978-1-62410-036-9 |url-access=subscription}}</ref> The increase in [[velocity]] of the airflow over the wing also adds to the lift force through conventional [[airfoil]] lift production.<ref name="cc">{{cite book |title=FlightWise: Principles of Aircraft Flight |url=https://archive.org/details/flightwiseprinci0000carp |url-access=registration |last=Carpenter |first=Chris |year=1996 |publisher=Airlife Publishing Ltd |___location= UK |isbn=9781853107191 }}</ref>

[[Image:Circulation Control Airfoil.svg|thumb|The [[trailing edge]] of a CCW showing the blowing slot and tangential [[coanda]] airflow.]]