Aeroelastic Analysis of a Smart Sandwich Compressor Blade with Electrorheological Core

Torsional aero-elastic analysis as well as the effect of the bending-torsion coupling on flutter stability boundaries of a turbomachinery cascade with electrorheological (ER) smart fluid based sandwich blade are studied. The governing equation of bending and torsional motion is based on classical sandwich beam theory and also the torsional theory of laminated rectangular plate have been used to formulate the structural dynamics of the blade in torsional mode. The electrorheological smart fluid is used as a middle layer between two elastic layers to investigate the effect of this electrorheological fluid on the aero-elastic behavior of the blades. Unsteady Whitehead's aerodynamic theory applied to model aerodynamic loadings. Lagrange equation and the assumed mode method are employed for discretization and derive the governing equation of the system. The results show the acceptable effect of adding smart fluid as a middle layer on the aero-elastic behavior and stability of mistuning blades. In fact, the aim of this study is to investigate the effect of electrorheological (ER) smart fluid on aeroelastic behavior of a sandwich beam with electrorheological core and elastic constraining layers.Observations showed that adding this fluid to the system can also be considered as a passive method in controlling vibrations and delaying the flutter phenomenon. by increasing the electric field intensity from ۲ to ۴, the dimensionless flutter speed increases by ۲۲.۲%.

کلیدواژه ها:

Torsional Vibration ، Rotary Smart Sandwich Blade ، Electrorheological Core