Active Control of a Planar Offset Attaching Jet Using Synthetic Jets. (2015)

• Record Type: Journal Article
• Authors: Xia, Yu; Liu, Xuanhe; Gao, Nan
• Is Part Of: Procedia engineering. Volume 126(2015)
• Page Start: 58
• Page End: 62
• Publication Date: 2015
• Subjects: Active flow control -- synthetic jet actuator -- offset attaching jet; Engineering -- Congresses; Engineering -- Periodicals; Engineering; Conference proceedings; Periodicals; 620.005
• DOI: 10.1016/j.proeng.2015.11.178
• Languages: English
• ISSNs: 1877-7058

Abstract

Abstract: A planar jet issued from a contoured nozzle was forced using a pair of synthetic jet actuators located along the upper and the lower edges of the jet exit. The forcing frequency varied from f Hj / Uo of 0.08 to 0.45 for a fixed forcing amplitude u ′/ U of 0.3. It was found that the time-averaged re-attachment length was reduced by forcing, the decreases were particularly large when the lower actuator was used. The flow field was modified significantly by the forcing when f Hj / Uo was 0.08, strong vortical structures were observed in the flow which increased the turbulent fluctuations along both shear layers.