Effect of Piezoelectric Material in Mitigation of Aerodynamic Forces
- 508 Downloads
In this study, piezoelectric materials were used to generate perturbations on the surface. This perturbation was used to combine upward wall motion and surface curvature. For this purpose, a Macro Fiber Composite (MFC) material was mounted on the surface of a cylindrical specimen for generating perturbation in the wind tunnel. Four different perturbation frequencies (1 Hz, 2 Hz, 3 Hz and 4 Hz) as well as the baseline specimen were tested in a low-speed wind tunnel (Re = 2.8 × 104). The MFC materials were mounted in a specimen to apply a combination of upward wall motion and surface curvature on the specimen in order to their effects on the leeward flow filed. The results showed that in the leeward flow field, for all actuation frequencies flow is bounded to a narrower width. In addition, Confinement of the flow in high actuation frequencies result in more turbulence in the leeward locations. In this case, the actuation frequencies resulted in up to 27% increase in turbulence intensity in the leeward.
KeywordsWind tunnel Macro Fiber Composite (MFC) Surface actuation Flow field Turbulence