NASA LogoNTRSNTRS - NASA Technical Reports ServerSearchmore_vertCollectionsAboutNewsHelpLogin Back to ResultsDynamic Stall Suppression Using Combustion-Powered Actuation (COMPACT)Retreating blade stall is a well-known phenomenon that limits rotorcraft speed, maneuverability, and efficiency. Airfoil dynamic stall is a simpler problem, which demonstrates many of the same flow phenomena. Combustion Powered Actuation (COMPACT) is an active flow control technology, which at the outset of this work, had been shown to mitigate static and dynamic stall at low Mach numbers. The attributes of this technology suggested strong potential for success at higher Mach numbers, but such experiments had never been conducted. The work detailed in this report documents a 3-year effort focused on assessing the effectiveness of COMPACT for dynamic stall suppression at freestream conditions up to Mach 0.5. The work done has focused on implementing COMPACT on a high-lift rotorcraft airfoil: the VR-12. This selection was made in order to ensure that any measured benefits are over and above the capabilities of state-of-the-art high-lift rotorcraft airfoils. The detailed Computational Fluid Dynamics (CFD) simulations, wind-tunnel experiments, and system-level modeling conducted have shown the following: (1) COMPACT, in its current state of development, is capable of reducing the adverse effects of deep dynamic stall at Mach numbers up to 0.4; (2) The two-dimensional (2D) CFD results trend well compared to the experiments; and (3) Implementation of the CFD results into a system-level model suggest that significant rotor-level benefits are possible.Document ID20160013834Acquisition SourceLangley Research CenterDocument TypeConference PaperAuthorsMatalanis, Claude G.*(United Technologies Research Center East Hartford, CT, United States)*Bowles, Patrick O.*(United Technologies Research Center East Hartford, CT, United States)*Jee, Solkeun*(United Technologies Research Center East Hartford, CT, United States)*Min, Byung-Young*(United Technologies Research Center East Hartford, CT, United States)*Kuczek, Andrzej E.*(United Technologies Research Center East Hartford, CT, United States)*Croteau, Paul F.*(United Technologies Research Center East Hartford, CT, United States)*Wake, Brian E.*(United Technologies Research Center East Hartford, CT, United States)*Crittenden, Thomas*(Georgia Inst. of Tech. Atlanta, GA, United States)*Glezer, Ari*(Georgia Inst. of Tech. Atlanta, GA, United States)*Lorber, Peter F.*(Sikorsky Aircraft Corp. Stratford, CT, United States)*Date AcquiredNovember 30, 2016Publication DateSeptember 1, 2016Subject CategoryFluid Mechanics And ThermodynamicsReport/Patent NumberNF1676L-24901NASA/CR-2016-219336Funding Number(s)CONTRACT_GRANT: NNC12CA36CWBS: WBS 664817.02.07.03.01.02Distribution LimitsPublicCopyrightPublic Use Permitted.Available DownloadsNameType20160013834.pdfSTIcloud_downloadcontent_copyvisibilityRelated RecordsThere are no records associated with this record.visibility_offNo Preview Available
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