High-Speed Experiments on Combustion-Powered Actuation for Dynamic Stall Suppression
Claude Matalanis, Patrick Bowles, United Technologies Research Cente; Peter Lorber, Sikorsky Aircraft; Tom Crittenden, Ari Glezer, Georgia Institute of Technology; Byung-Young Min, Solkeun Jee, Brian Wake, Andrzej Kuczek, United Technologies Research Center; Norman Schaeffler, NASA Langley Research Center
May 17, 2016
High-Speed Experiments on Combustion-Powered Actuation for Dynamic Stall Suppression
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High-Speed Experiments on Combustion-Powered Actuation for Dynamic Stall Suppression
Authors / Details: Claude Matalanis, Patrick Bowles, United Technologies Research Cente; Peter Lorber, Sikorsky Aircraft; Tom Crittenden and Ari Glezer, Georgia Institute of Technology; Byung-Young Min, Solkeun Jee, Brian Wake and Andrzej Kuczek, United Technologies Research Center; Norman Schaeffler, NASA Langley Research CenterAbstract
This work documents high-speed wind tunnel experiments conducted on a pitching airfoil equipped with an array of combustion-powered actuators (COMPACT). The main objective of these experiments was to demonstrate the stall-suppression capability of COMPACT on a high-lift rotorcraft airfoil, the VR-12, at relevant Mach numbers. Through dynamic pressure measurements at the airfoil surface, it was shown that COMPACT can positively affect the stall behavior of the VR-12 at Mach numbers up to 0.4. Static airfoil results demonstrated 25% and 50% increases in post-stall lift at Mach numbers of 0.4 and 0.3, respectively. Deep dynamic stall results showed cycle-averaged lift coefficient increases up to 11% at Mach 0.4. Furthermore, it was shown that these benefits could be achieved with relatively few pulses during down-stroke and with no need to pre-anticipate the stall event. The flow mechanisms responsible for stall suppression were investigated using particle image velocimetry.
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High-Speed Experiments on Combustion-Powered Actuation for Dynamic Stall Suppression
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