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Fundamental Study And Development Of Tuned Active Flow Control Actuators, Brian A. Binkley
Fundamental Study And Development Of Tuned Active Flow Control Actuators, Brian A. Binkley
Doctoral Dissertations
A novel, multi-level, flow-control actuator was developed using piezoceramic materials. Several actuators were fabricated in various shapes and sizes to produce a variety of effects for flow control applications. The actuators were studied in a quiescent-air bench test to understand the vibrations produced by various actuator shapes. The actuator flow-control effect was studied experimentally with flat-plate and cavity configurations, and was studied numerically using moving boundary conditions and dynamic meshing. The disturbances produced by the actuator couple with the cavity flow field producing increased cavity tones, increased vorticity, and sustainment of large-scale vorticity downstream of the cavity. The combined actuation …
Analysis And Comparison Of Effects Of An Airfoil Or A Rod On Supersonic Cavity Flow., William Leland Fowler
Analysis And Comparison Of Effects Of An Airfoil Or A Rod On Supersonic Cavity Flow., William Leland Fowler
Masters Theses
The effects of an airfoil at different angles of attack and a circular cylindrical rod within the edge of the boundary layer flow at the leading edge of a cavity as a device for controlling the large pressure fluctuations (resonance tones) in the cavity were investigated. The airfoil results were compared with the rod in crossflow method positioned at the same leading edge location. The cavity used for testing corresponded to a length to depth ratio, L/D of 11.0/2.25 with a length to width ratio, L/W of 11.0/3.00 at a freestream Mach 1.84 flow. The study included measurements of dynamic …