NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Noise Reduction Through Circulation ControlCirculation control technology uses tangential blowing around a rounded trailing edge or a leading edge to change the force and moment characteristics of an aerodynamic body. This technology has been applied to circular cylinders, wings, helicopter rotors, and even to automobiles for improved aerodynamic performance. Only limited research has been conducted on the acoustic of this technology. Since wing flaps contribute to the environmental noise of an aircraft, an alternate blown high lift system without complex mechanical flaps could prove beneficial in reducing the noise of an approaching aircraft. Thus, in this study, a direct comparison of the acoustic characteristics of high lift systems employing a circulation control wing configuration and a conventional wing flapped configuration has been made. These results indicate that acoustically, a circulation control wing high lift system could be considerably more acceptable than a wing with conventional mechanical flaps.
Document ID
20050192626
Acquisition Source
Langley Research Center
Document Type
Conference Paper
Authors
Munro, Scott E.
(Georgia Inst. of Tech. Atlanta, GA, United States)
Ahuja, K. K.
(Georgia Inst. of Tech. Atlanta, GA, United States)
Englar, Robert J.
(Georgia Inst. of Tech. Atlanta, GA, United States)
Date Acquired
September 7, 2013
Publication Date
June 1, 2005
Publication Information
Publication: Proceedings of the 2004 NASA/ONR Circulation Control Workshop, Part 1
Subject Category
Aircraft Design, Testing And Performance
Report/Patent Number
AIAA Paper 2001-0666
Meeting Information
Meeting: 39th AIAA Aerospace Sciences Meeting and Exhibit
Country: United States
Start Date: January 1, 2001
End Date: January 8, 2001
Funding Number(s)
CONTRACT_GRANT: NAG1-2146
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
No Preview Available