抄録
Numerical simulations are carried out to find out the optimum operating mode of a piezo-ceramic actuator attached to a flat-plate surface. The goal is to generate a strong velocity fluctuation waves in a boundary layer. As a result, it is shown that strong waves can be generated when the actuator is operated concentrating the production of vorticity fluctuations to smaller region. It is also shown that making the actuators to travel downstream at the speed of the target T-S waves can generate even stronger waves.
