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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]]. 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=Circulation Control Wing |accessdate=2007-12-15 |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 }}</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 web |url=http://pdf.aiaa.org/preview/CDReadyMFLC06_1187/PV2006_3011.pdf |title=Large Eddy Simulation of a Circulation Control Airfoil. |accessdate=2007-12-18 |last=Slomski |first=J.F. |coauthors= |date=2006-06-05 |format=PDF }}{{dead link|date=January 2018 |bot=InternetArchiveBot |fix-attempted=yes }}</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 |url=https://archive.org/details/flightwiseprinci0000carp |url-access=registration |last=Carpenter |first=Chris |year=1996 |publisher=Airlife Publishing Ltd |___location= UK }}</ref>
[[Image:Circulation Control Airfoil.svg|thumb|The [[trailing edge]] of a CCW showing the blowing slot and tangential [[coanda]] airflow.]]
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