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Continued Development and Application of Circulation Control Pneumatic Technology to Advanced Transport AircraftPersonnel of the Georgia Tech Research Institute (GTRI) Aerospace and Transportation Lab have completed a four-year grant program to develop and evaluate the pneumatic aerodynamic technology known as Circulation Control (CC) or Circulation Control Wing (CCW) for advanced transport aircraft. This pneumatic technology, which employs low-level blowing from tangential slots over round or near-round trailing edges of airfoils, greatly augments the circulation around a lifting or control surface and thus enhances the aerodynamic forces and moments generated by that surface. Two-dimensional force augmentations as high as 80 times the input blowing momentum coefficient have been recorded experimentally for these blown devices, thus providing returns of 8000% on the jet momentum expended. A further benefit is the absence of moving parts such as mechanical flaps, slats, spoilers, ailerons, elevators and rudders from these pneumatic surfaces, or the use of only very small, simple, blown aerodynamic surfaces on synergistic designs which integrate the lift, drag and control surfaces. The application of these devices to advanced aircraft can offer significant benefits in their performance, efficiency, simplicity, reliability, economic cost of operation, noise reduction, and safety of flight. To further develop and evaluate this potential, this research effort was conducted by GTRI under grant for the NASA Langley Research Center, Applied Aerodynamics Division, Subsonic Aerodynamics Branch, between June 14, 1993 and May 31, 1997.
Document ID
19980022169
Document Type
Contractor Report (CR)
Authors
Englar, Robert J. (Georgia Inst. of Tech. Atlanta, GA United States)
Date Acquired
September 6, 2013
Publication Date
March 3, 1998
Subject Category
Aerodynamics
Report/Patent Number
NAS 1.26:207471
GTRI-A-9483
NASA/CR-1998-207471
Funding Number(s)
CONTRACT_GRANT: NAG1-1517
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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