Dual-pin electrohydrodynamic generator driven by alternating current

Dau, Van Thanh and Dinh, Thien Xuan and Tran, Canh-Dung and Terebessy, Tibor and Bui, Tung Thanh (2018) Dual-pin electrohydrodynamic generator driven by alternating current. Experimental Thermal and Fluid Science, 97. pp. 290-295. ISSN 0894-1777


We report a unique alternating current (AC) driven corona based air-flow generator using symmetrically arranged
electrodes. Unlike the conventional configuration where one electrode generates charged ions moving
towards the reference electrode, this configuration allows both negative and positive charges to simultaneously
move away from the device and generate ion wind in parallel with the electrodes. In comparison with the direct
current (DC) driven corona generator, the time oscillating AC field allows the device a better stabilization owing
to the independence of ion wind strength from the inter-electrode spacing. Our results by both simulation and
experiment showed that when the AC frequency exceeds a threshold value of 1100 Hz, the electric field at the
electrode tips is determined dominantly by the charge cloud created in the previous half-cycle, resulting in stronger net electric field and thus stronger ion wind. In addition, the electrode separation in the AC driven corona based generator is less critical above the frequency threshold, yielding a more robust design with minimized susceptibility to manufacturing tolerances and impurities on the electrodes. Moreover, lower voltage levels of the AC driven system allow simpler and more economical design in the high voltage circuit of the AC generator.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Accepted version embargoed until 1 June 2019 (12 months), in accordance with the copyright policy of the publisher.
Faculty / Department / School: Current - Faculty of Health, Engineering and Sciences - School of Mechanical and Electrical Engineering
Date Deposited: 09 May 2018 01:50
Last Modified: 16 May 2018 02:01
Uncontrolled Keywords: alternating current, bipolar discharge, ion wind, parallel pin
Fields of Research : 09 Engineering > 0915 Interdisciplinary Engineering > 091599 Interdisciplinary Engineering not elsewhere classified
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970102 Expanding Knowledge in the Physical Sciences
URI: http://eprints.usq.edu.au/id/eprint/34095

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