Seventh International Symposium on Turbulence and Shear Flow Phenomena
DOI: 10.1615/TSFP7
THE INFLUENCE OF FREQUENCY-LIMITED AND NOISE-CONTAMINATED SENSING ON REACTIVE TURBULENCE CONTROL SCHEMES
pages 1-6
DOI: 10.1615/TSFP7.2310
ABSTRACT
Existing reactive turbulence control schemes for skin friction drag reduction are investigated to see how frequencylimited and noise-contaminated sensing will influence their control performance. It is found that the sensing frequency can be reduced substantially when the control scheme is modified to account for the convection speed of the measured sensor signal. Noisy sensor signals are shown to strongly affect the achievable net energy saving rate and energy gain at high sensing frequencies, while their influence is weaker for reduced sensing frequencies. These results also hold for increased Reynolds number where the performance of the control scheme is generally reduced.