Abstract
An experimental study of flow control using an array of three synthetic jets has been undertaken in a separated laminar flow over a flap in water. PIV was employed to obtain the information about the extent of flow separation delay at different synthetic jet operating conditions. Laser induced florescence (LIF) flow visualisation technique was used to reveal the characteristics of the vortical structures produced by the synthetic jets which result in a delay of separation. It was observed that the flow separation delay is typically associated with the presence of two streaks or three streaks of high streamwise velocity in the separating flow. Based on the results from the present experiment, a parameter map indicating the flow patterns observed at different synthetic jet operating conditions is produced. In addition, a contour map showing the separation control effectiveness at the corresponding conditions is also obtained. It was found that the twostreak flow pattern is mostly produced at a jet-to-freestream velocity ratio (VR) between 0.3 and 0.5 whereas the three-streak pattern occurs at 0.5
| Original language | English |
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| Title of host publication | 39th AIAA Fluid Dynamics Conference|AIAA Fluid Dyn. Conf. |
| Publication status | Published - 2009 |
| Event | 39th AIAA Fluid Dynamics Conference - San Antonio, TX Duration: 1 Jul 2009 → … |
Conference
| Conference | 39th AIAA Fluid Dynamics Conference |
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| City | San Antonio, TX |
| Period | 1/07/09 → … |
