PSJA を用いた円柱後流の遅延フィードバック制御

抄録

This study shows the results of experiments in which the delayed feedback control at a flow velocity of a cylinder wake using PSJA. PSJA is a fluid control device using plasma generated by dielectric barrier discharge. The aim of this experiment is to effectively suppress the generation of vortices at the rear of a cylinder by the delayed feedback control method. The experiments are performed at Re = 1.6×10⁴ . The delayed feedback control was converted into PWM signals for the external input to the drive circuit output obtained from the hot wire anemometer in the microcomputer, and drive PSJA. As a result, the PWM driving by the delayed feedback control relative to non-driving, an increase in the flow velocity, a reduction in the turbulence intensity was seen. However, this result is not extend to the result of the continuous driving, it did not lead to effective suppression of vortex. Therefore, it is necessary to review threshold during PWM signal conversion in microcomputer and optimize the delay time τ.