Please use this identifier to cite or link to this item: http://buratest.brunel.ac.uk/handle/2438/10611
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dc.contributor.authorJabbal, M-
dc.contributor.authorKykkotis, S-
dc.date.accessioned2015-04-21T13:03:04Z-
dc.date.available2014-
dc.date.available2015-04-21T13:03:04Z-
dc.date.issued2014-
dc.identifier.citation32nd AIAA Applied Aerodynamics Conference, 16-20 June 2014, Atlanta, GAen_US
dc.identifier.isbn9781624102882-
dc.identifier.urihttp://arc.aiaa.org/doi/abs/10.2514/6.2014-2975-
dc.identifier.urihttp://bura.brunel.ac.uk/handle/2438/10611-
dc.description.abstractThis paper details an experimental investigation aimed at reducing the noise output of piezoelectrical-driven synthetic jet actuators without compromising peak jet velocity. Specifically, the study considers double-chamber ('back-to-back') actuators for anti-phase noise suppression and corrugated-lobed orifices as a method to enhance turbulent mixing of the jets to suppress jet noise. The study involved the design, manufacture and bench test of interchangeable actuator hardware. Hot-wire anemometry and microphone recordings were employed to acquire velocity and noise measurements respectively for each chamber configuration and orifice plate across a range of excitation frequencies and for a fixed input voltage. The data analysis indicated a 32% noise reduction (20 dBA) from operating a singlechamber, circular orifice SJA to a double-chamber, corrugated-lobed orifice SJA at the Helmholtz resonant frequency. Results also showed there was a small reduction in peak jet velocity of 7% (~3 m/s) between these two cases based on orifices of the same discharge area. Finally, the electrical-to-fluidic power conversion efficiency of the double-chamber actuator was found to be 15% across all orifice designs at the resonant frequency; approximately double the efficiency of a single-chamber actuator. This work has thus demonstrated feasible gains in noise reduction and power efficiency through synthetic jet actuator design.en_US
dc.language.isoenen_US
dc.publisherAmerican Institute of Aeronautics and Astronautics Inc.en_US
dc.subjectNoise reductionen_US
dc.subjectPiezoelectricalen_US
dc.subjectSynthetic jet actuatorsen_US
dc.titleTowards the noise reduction of piezoelectrical-driven synthetic jet actuatorsen_US
dc.typeConference Paperen_US
dc.identifier.doihttp://dx.doi.org/10.2514/6.2014-2975-
dc.relation.isPartOf32nd AIAA Applied Aerodynamics Conference-
dc.relation.isPartOf32nd AIAA Applied Aerodynamics Conference-
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pubs.organisational-data/Brunel/Brunel Staff by College/Department/Division/College of Engineering, Design and Physical Sciences/Dept of Mechanical, Aerospace and Civil Engineering-
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Appears in Collections:Dept of Mechanical Aerospace and Civil Engineering Research Papers

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