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dc.rights.licenseUsers may download and share copies with attribution in accordance with a Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 License. No commercial use or derivatives are permitted without the explicit approval of the author.
dc.contributorAmitay, Michael
dc.contributorOberai, Assad
dc.contributorHerron, Isom H., 1946-
dc.contributorSahni, Onkar
dc.contributor.authorTaylor, Keith Robert
dc.date.accessioned2021-11-03T08:09:12Z
dc.date.available2021-11-03T08:09:12Z
dc.date.created2014-09-11T10:22:40Z
dc.date.issued2014-05
dc.identifier.urihttps://hdl.handle.net/20.500.13015/1091
dc.descriptionMay 2014
dc.descriptionSchool of Engineering
dc.description.abstractThis study demonstrated that, through the introduction of periodic momentum near the leading edge of this model, the average tip deflection could be reduced under dynamic conditions. Furthermore, it was demonstrated that, at certain levels of momentum injection, tip deflections might actually be enhanced. Where load oscillations during dynamic conditions were observed, a similar trend occured. Certain levels of momentum injection resulted in higher oscillations in loading observed during dynamic pitching, where higher momentum injection levels reduced load oscillations during dynamic cycles. This work concludes with the suggestion that, moving to full scale testing of this flow control system, it will be necessary to provide sufficiently high momentum injection such that damage will not occur from the implementation and actuation of a flow control system.
dc.description.abstractUnderstanding and implementing engineering techniques that serve the purpose of reducing structural vibrations and load variations in wind turbine blades is of critical importance to the goal of reducing the cost of energy of wind energy systems. The effectiveness in reducing structural vibrations and load oscillations of a finite span S809 airfoil was investigated experimentally in the Rensselaer Polytechnic Institute's low speed wind tunnel at the Center for Flow Physics and Control (CeFPaC). The structural vibrations and load oscillations arose due to prescribed dynamic pitching parameters corresponding to non-dimensional motion parameters typically seen in field conditions. Aerodynamic loading was measured through a six component load cell located at the root of the model. Two-component and three-component velocity fields were measured through the use of a stereoscopic PIV system. Structural vibrations were measured through the use of strain gauges placed at the base of the model, and tip deflection was inferred by calibrating voltage variations in the strain gauges with tip deflections measured by a laser displacement sensor.
dc.description.abstractThis process seems to be the result of changing how the flow field transitions from trailing edge separation to a fully separated flow. In a phase-averaged sense, this is defined by the creation of a phase averaged leading edge recirculation region, which interacts with the trailing edge separation. Through the introduction of momentum near the leading edge, this process can be altered, such that the phase averaged trailing edge separation region is the dominant structure present in the flow.
dc.language.isoENG
dc.publisherRensselaer Polytechnic Institute, Troy, NY
dc.relation.ispartofRensselaer Theses and Dissertations Online Collection
dc.subjectAeronautical engineering
dc.titleDynamic load control of a wind turbine blade using synthetic jets
dc.typeElectronic thesis
dc.typeThesis
dc.digitool.pid172615
dc.digitool.pid172616
dc.digitool.pid172617
dc.rights.holderThis electronic version is a licensed copy owned by Rensselaer Polytechnic Institute, Troy, NY. Copyright of original work retained by author.
dc.description.degreePhD
dc.relation.departmentDept. of Mechanical, Aerospace, and Nuclear Engineering


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