Performance and flow characteristics of single and a novel double oscillating water column devices

Prasad, Deepak D. and Kim, C.G. and Kang, H.G. and Ahmed, Mohammed R. and Lee, Y.H. (2017) Performance and flow characteristics of single and a novel double oscillating water column devices. Journal of Mechanical Science and Technology, 31 (12). pp. 5879-5886. ISSN 1738-494X

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Abstract

The performance of a single oscillating water column (OWC) in normal and opposite configuration employing a Savonius rotor is investigated. For the normal OWC, the peak performance occurred at wave period T = 1.7 s with rotor speed of 86 rpm at wave height H = 80 mm. The opposite OWC recorded peak performance at the same wave period and the rotor had a maximum speed of 65 rpm at H = 80 mm. Furthermore, a novel double OWC configuration was tested and the peak performance of the rotor in the front and rear OWC occurred at T = 1.675 s with respective rotor speeds of 74 rpm and 53 rpm. The double OWC was analyzed by combining the performance of the rotor in the front and rear OWC. The particle image velocimetry (PIV) results showed regions of re-circulating flow in the chamber as well as around the rotor. It was interesting to note that when comparing the advancing flow and the retreating flow, the flow had more energy when retreating hence suggesting more energy is imparted onto the rotor during this time. The PIV results provided a deeper insight into the flow characteristics and the rotor performance.

Item Type:	Journal Article
Additional Information:	The paper will appear online after 20 December 2017
Uncontrolled Keywords:	Wave energy; Oscillating water column; Double OWC; Particle image velocimetry (PIV); Savonius rotor.
Subjects:	T Technology > TJ Mechanical engineering and machinery
Divisions:	Faculty of Science, Technology and Environment (FSTE) > School of Engineering and Physics
Depositing User:	M. Rafiuddin Ahmed
Date Deposited:	12 Dec 2017 02:49
Last Modified:	05 Jan 2018 02:01
URI:	https://repository.usp.ac.fj/id/eprint/10408

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