Please use this identifier to cite or link to this item:
http://bura.brunel.ac.uk/handle/2438/10611
Title: | Towards the noise reduction of piezoelectrical-driven synthetic jet actuators |
Authors: | Jabbal, M Kykkotis, S |
Keywords: | Noise reduction;Piezoelectrical;Synthetic jet actuators |
Issue Date: | 2014 |
Publisher: | American Institute of Aeronautics and Astronautics Inc. |
Citation: | 32nd AIAA Applied Aerodynamics Conference, 16-20 June 2014, Atlanta, GA |
Abstract: | This 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. |
URI: | http://arc.aiaa.org/doi/abs/10.2514/6.2014-2975 http://bura.brunel.ac.uk/handle/2438/10611 |
DOI: | http://dx.doi.org/10.2514/6.2014-2975 |
ISBN: | 9781624102882 |
Appears in Collections: | Dept of Mechanical and Aerospace Engineering Research Papers |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Fulltext.pdf | 919.51 kB | Adobe PDF | View/Open |
Items in BURA are protected by copyright, with all rights reserved, unless otherwise indicated.