Type of Document	Thesis
Author	Hogue, Joshua Michael
Author's Email Address	jmh05e@fsu.edu
URN	etd-04142011-163922
Title	Broadband Microjet Flow Control Using Piezoelectric Actuators
Degree	Master of Science
Department	Mechanical Engineering, Department of
Advisory Committee	Advisor Name Title William Oates Committee Chair Farrukh Alvi Committee Member Jonathan Clark Committee Member
Keywords	piezoelectric hydraulic actuator pulsed flow microjet
Date of Defense	2011-03-25
Availability	unrestricted
Abstract A piezohydraulic active flow control actuator is developed using a 400 µm diameter micro jet that is capable of pulsing flow over a broad frequency range. The design of the piezohydraulic microjet is presented together with experimental results that demonstrate multiphysics system dynamic characteristics. The microjet actuator couples a piezoelectric stack actuator and a hydraulic circuit to amplify the stack actuator displacement to an amplitude that is necessary to throttle flow through the micro jet. Unsteady pressure measurements at the microjet exit are compared with the piezoelectric stack actuator displacement and voltage input to provide comparisons between internal electromechanical actuation and external pulsed flow behavior. High-speed micro-Schlieren imagery is also utilized to quantify the flow field. The results illustrate broadband supersonic pulsed microjet actuator performance using a piezohydraulic circuit.
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