Modelling a piezoelectric-driven actuator for active flow control
Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Flow control is an area of research of particular interest within automotive and aerospace industries since methods used to affect the fluid flow around vehicles can reduce drag and therefore lower their fuel consumption. One of these methods, which has generated a lot of interest in later years, is called active flow control and uses different types of actuators to impact the surrounding flow.
In this thesis a model of a piezoelectric actuator for active flow control has been developed using Lumped Element Modelling and equivalent circuits. This approach, together with the chosen software for implementation, Simulink, provides models which are easy to simulate and evaluate.
The actuator model has been validated using a novel methodology with sub-models with the purpose of reducing computational costs. The actuator is therefore divided into two submodels,one for structural and one for fluid dynamics, which are validated separately. This enables the use of simple yet accurate FEM and CFD models instead of time consuming FSI software which the complete model requires.
The three implemented models have been validated using cases presented in previous studies and data from CFD-simulations. The results show that the decoupled models can be validated separately and its results can be integrated into the complete model, although further tests with a real actuator is needed.
In addition to the modelling, a parameter study of the actuator has been performed in order to prepare for prototype design.
Place, publisher, year, edition, pages
2014. , 64 p.
Piezoelectric actuator, Lumped Element Modelling, Equivalent circuits, Active Flow Control, Simulink
IdentifiersURN: urn:nbn:se:liu:diva-114957ISRN: LitH-ISY-EX--14/4818--SEOAI: oai:DiVA.org:liu-114957DiVA: diva2:793180
Subject / course