Hybrid Control of Jet Flows
Abstract
The use of swirl and synthetic jet actuators in a hybrid control scheme is described. The results here are limited to the characterization of (1) swirling jet flows and (2) synthetic jets in a two-dimensional mixing layer. Jets with swirl numbers of 0.10 and 0.23 with different tangential velocity profiles were studied. The lower swirl jets behaved similarly to non-swirling jets, whereas the higher swirl jets enhanced mixing significantly, up to 40% for the cases studied here. At the nozzle exit, higher turbulence levels were observed in the swirling jets, and the investigation of the effect of swirl on turbulent structure continues. Synthetic jet actuators on the trailing edge of a splitter plate were studied in two orientations - aligned spanwise to the flow and aligned with the flow. The actuator oriented spanwise to the flow enhanced the streamwise vortices in the mixing layer yielding an increase in non-dimensional mixing layer growth rate of 53%, whereas the other orientation produced little change in the streamwise vortices and only produced a 19% increase.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 31, 2003
- Accession Number
- ADA417777
Entities
People
- Douglas R. Smith
- Jonathan W. Naughton
Organizations
- University of Wyoming