What is it about?
This work deals with the flow control of a straight wing model using an array of synthetic jet actuators. The Tomographic PIV measurements were carried out to investigate the flow control phenomenon in an in-depth manner. Both time-averaged and phase-locked flow fields were analyzed. It is found that the control effect reaches its maximum at the nominal phase angle 180 °, which is close to the instant when the SJ array achieves its maximum blowing. Significant reduction of the shape factor confirms the effectiveness of the current SJ array in overcoming flow separation
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Why is it important?
The present work unveils more flow details of mildly controlled separated flow over a straight-wing model using a newly developed SJ array. The SJ array used in the control produces SJs with a relatively smaller momentum coefficient 4.2 × 10^−5 at SJ actuation frequency 400 Hz. Even with a smaller momentum coefficient, the SJs are effective in controlling the flow separation.
Perspectives
The newly developed synthetic jet actuators have the capability to control the flow separation effectively. Through this study, it was observed that although the control of the newly developed SJ array is mild, it is able to bring favorable change to a separated flow towards a fully attached flow.
Dr Pramod Salunkhe
Manipal University
Read the Original
This page is a summary of: PIV measurement of mildly controlled flow over a straight-wing model, International Journal of Heat and Fluid Flow, December 2016, Elsevier,
DOI: 10.1016/j.ijheatfluidflow.2016.08.004.
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