Experimental investigation of separation-reattachment flow control after a forward facing step is performed. In order to control separation-reattachment flow, the surface near the forward facing step is manipulated by piezo actuators set at 3 spanwise locations. It is shown that the spanwise phase of separation-reattachment flow can be controlled without increasing the average turbulence level of the flow by minute movement of the actuators. The spanwise phase can be controlled when the manipulating frequency is between 600 Hz and 1200 Hz. The controllable frequency extends to lower values when the spanwise phase of the actuator movement is uniform, while it extends to higher values for alternate phase manipulation.
|Number of pages||6|
|Journal||Nippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B|
|Publication status||Published - 1997|
ASJC Scopus subject areas
- Condensed Matter Physics
- Mechanical Engineering