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Enhancements to the FAST-MAC Circulation Control Model and Recent High-Reynolds Number Testing in the National Transonic FacilityA second wind tunnel test of the FAST-MAC circulation control model was recently completed in the National Transonic Facility at the NASA Langley Research Center. The model was equipped with four onboard flow control valves allowing independent control of the circulation control plenums, which were directed over a 15% chord simple-hinged flap. The model was configured for low-speed high-lift testing with flap deflections of 30 and 60 degrees, along with the transonic cruise configuration with zero degree flap deflection. Testing was again conducted over a wide range of Mach numbers up to 0.88, and Reynolds numbers up to 30 million based on the mean chord. The first wind tunnel test had poor transonic force and moment data repeatability at mild cryogenic conditions due to inadequate thermal conditioning of the balance. The second test demonstrated that an improvement to the balance heating system significantly improved the transonic data repeatability, but also indicated further improvements are still needed. The low-speed highlift performance of the model was improved by testing various blowing slot heights, and the circulation control was again demonstrated to be effective in re-attaching the flow over the wing at off-design transonic conditions. A new tailored spanwise blowing technique was also demonstrated to be effective at transonic conditions with the benefit of reduced mass flow requirements.
Document ID
20140000466
Acquisition Source
Langley Research Center
Document Type
Conference Paper
Authors
Milholen, William E., II (NASA Langley Research Center Hampton, VA, United States)
Jones, Gregory S. (NASA Langley Research Center Hampton, VA, United States)
Chan, David T. (NASA Langley Research Center Hampton, VA, United States)
Goodliff, Scott L. (Jacobs Sverdrup Technology, Inc. Hampton, VA, United States)
Anders, Scott G. (NASA Langley Research Center Hampton, VA, United States)
Melton, Latunia P. (NASA Langley Research Center Hampton, VA, United States)
Carter, Melissa B. (NASA Langley Research Center Hampton, VA, United States)
Allan, Brian G. (NASA Langley Research Center Hampton, VA, United States)
Capone, Francis J. (Vigyan Research Associates, Inc. Hampton, VA, United States)
Date Acquired
January 29, 2014
Publication Date
June 24, 2013
Subject Category
Aerodynamics
Report/Patent Number
NF1676L-15676
Meeting Information
Meeting: AIAA Fluid Dynamics Conference and Exhibit
Location: San Diego, CA
Country: United States
Start Date: June 24, 2013
End Date: June 27, 2013
Sponsors: American Inst. of Aeronautics and Astronautics
Funding Number(s)
WBS: WBS 561581.02.08.07.46.01
Distribution Limits
Public
Copyright
Public Use Permitted.

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