Active control of the jet in coaxial arrangement
1 Institute of Thermomechanics AS CR, 182 00 Prague, Czech Republic
2 CTU, Faculty of Mechanical Engineering, 166 07 Prague, Czech Republic
An axisymmetric jet flow, issuing as a fully developed flow from a long straight pipe at Re = 1600 and 5500, was actively controlled by an annular synthetic jet. The Pitot tube, hot-wire anemometry (CTA) and flow visualization were used for an experimental investigation of the flow control. The working fluid was air. The effect of varying Strouhal number (St = (0.18÷1.94)) on a width and entrainment of the main jet flow was studied. It was found that the main jet is the most sensitive to the actuation at St = 0.28÷0.60 and St = 0.18, for Re = 1600 and Re = 5500, respectively.
© Owned by the authors, published by EDP Sciences, 2013
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