Harvesting wind energy using a galloping piezoelectric beam

dc.contributor.advisorSirohi, Jayanten
dc.contributor.committeeMemberBennighof, Jeffreyen
dc.creatorMahadik, Rohan Ramen
dc.date.accessioned2011-07-12T15:19:59Zen
dc.date.available2011-07-12T15:19:59Zen
dc.date.issued2011-05en
dc.date.submittedMay 2011en
dc.date.updated2011-07-12T15:20:11Zen
dc.descriptiontexten
dc.description.abstractGalloping of structures such as transmission lines and bridges is a classical aeroelastic instability that has been considered as harmful and destructive. However, there exists potential to harness useful energy from this phenomenon. The study presented in this paper focuses on harvesting wind energy that is being transferred to a galloping beam. The beam has a rigid prismatic tip body. Triangular and D-section are the two kinds of cross section of the tip body that are studied, developed and tested. Piezoelectric sheets are bonded on the top and bottom surface of elastic portion of the beam. During galloping, vibrational motion is input to the system due to aerodynamic forces acting on the tip body. This motion is converted into electrical energy by the piezoelectric (PZT) sheets. A potential application for this device is to power wireless sensor networks on outdoor structures such as bridges and buildings. The relative importance of various parameters of the system such as wind speed, material properties of the beam, electrical load, beam natural frequency and aerodynamic geometry of the tip body is discussed. A model is developed to predict the dynamic response, voltage and power results. Experimental investigations are performed on a representative device in order to verify the accuracy of the model as well as to study the feasibility of the device. A maximum output power of 1.14 mW was measured at a wind velocity of 10.5 mph.en
dc.description.departmentAerospace Engineeringen
dc.format.mimetypeapplication/pdfen
dc.identifier.slug2152/ETD-UT-2011-05-2524en
dc.identifier.urihttp://hdl.handle.net/2152/ETD-UT-2011-05-2524en
dc.language.isoengen
dc.subjectGallopingen
dc.subjectVibrationen
dc.subjectPiezoelectricen
dc.subjectCantilever beamen
dc.subjectWind energyen
dc.subjectEnergy harvestingen
dc.subjectAerodynamicen
dc.titleHarvesting wind energy using a galloping piezoelectric beamen
dc.type.genrethesisen
thesis.degree.departmentAerospace Engineeringen
thesis.degree.disciplineAerospace Engineeringen
thesis.degree.grantorUniversity of Texas at Austinen
thesis.degree.levelMastersen
thesis.degree.nameMaster of Science in Engineeringen

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