The aerodynamic forces and moments on an axisymmetric body of revolution are
controlled in a low-speed wind tunnel by induced local flow attachment. Control is
effected by an array of aft-facing synthetic jets emanating from narrow, azimuthally
segmented slots embedded within an axisymmetric backward facing step. The actuation
results in a localized, segmented vectoring of the separated base flow along a rear Coanda
surface and induced asymmetric aerodynamic forces and moments. The observed effects
are investigated in both quasi-steady and transient states, with emphasis on parametric
dependence. It is shown that the magnitude of the effected forces can be substantially
increased by slight variations of the Coanda surface geometry. Force and velocity
measurements are used to elucidate the mechanisms by which the synthetic jets produce
asymmetric aerodynamic forces and moments, demonstrating a novel method to steer
axisymmetric bodies during flight.
| Identifer | oai:union.ndltd.org:GATECH/oai:smartech.gatech.edu:1853/42830 |
| Date | 14 November 2011 |
| Creators | Rinehart, Christopher S. |
| Publisher | Georgia Institute of Technology |
| Source Sets | Georgia Tech Electronic Thesis and Dissertation Archive |
| Detected Language | English |
| Type | Dissertation |
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