Real-time reactive control of stochastic disturbances in forced turbulent jets
Igor A. Maia, Peter Jordan, André V. G. Cavalieri, Eduardo Martini, Kenzo Sasaki, Flávio J. Silvestre
Abstract
In this work we perform reactive control of axisymmetric disturbances in turbulent jets. The disturbances are produced by an external forcing and possess stochastic phases and amplitudes, akin to turbulent fluctuations found in unforced jets. The control law is based on an existing inverse feedforward scheme developed for transition control. Here we apply it to control convective growth mechanisms in fully turbulent jets and we build on previous works that considered control of harmonic disturbances. We demonstrate the successful implementation of real-time reactive control of the disturbances and achieve order-of-magnitude attenuations of velocity fluctuations.