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Dual-pin electrohydrodynamic generator driven by alternating current

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

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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.

Item Type: Article
Uncontrolled Keywords: Parallel pin, Ion wind, Alternating current, Bipolar discharge
Subjects: ISI-indexed journals
Divisions: Faculty of Electronics and Telecommunications (FET)
Depositing User: Bùi Thanh Tùng
Date Deposited: 13 Jun 2018 09:37
Last Modified: 13 Jun 2018 09:37

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