Turbomachine airfoil vibration control utilizing active and passive piezoelectric elements
Abstract
Vibration of turbomachine airfoils due to unsteady aerodynamic loading is a significant cause of gas turbine engine failures and the need for both unscheduled and scheduled maintenance. Minimization of the response to the aerodynamic forcing functions which the components experience can reduce or even alleviate the need for costly repairs and diminish the possibility of failure. This thesis research is directed at investigating a series of preliminary airfoil vibration control experiments which are described. Electrically shunted bonded piezoelectric elements are utilized to actively and passively control airfoil vibrational motion and alleviate the high cycle induced stresses in the airfoil which lead to premature failure. The shunts are optimized to control specific vibrational modes. Data are analyzed and demonstrate the viability of this unique vibration control technique.
Degree
Ph.D.
Advisors
Fleeter, Purdue University.
Subject Area
Mechanical engineering|Aerospace materials
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