The effect of low-speed, circular synthetic jets (SJ) on the turbulent transition of a laminar
boundary layer is studied through direct numerical simulations. The SJ capability in fixating
the streamwise location of transition onset is analyzed in terms of its operation parameters
(reduced frequency F+ and momentum coefficient C μ⁠). The effect of free-stream
turbulence (FST) on the near-wall vortical structures generated by the synthetic jet is
analyzed as well, to mimic the actual operation of the control system. Velocity spectra, phase …