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Experimental analysis into the effects of air compressibility in OWC model testing
Citation
Howe, D and Nader, J-R and MacFarlance, G, Experimental analysis into the effects of air compressibility in OWC model testing, AWTEC 2018 Proceedings, 09-13 September 2018, Taipei, Taiwan, pp. 449. (2018) [Refereed Conference Paper]
Copyright Statement
Copyright 2018 the authors
Official URL: https://www.awtec2018.com/programme
Abstract
It is well documented that the effect of air compressibility will potentially influence the performance of an Oscillating Water Column (OWC) device, with a number of previous theoretical studies examining these effects [1-5]. The implications of air compressibility have the most significant effect at full scale, which can be attributed to the large air chamber volume and the increase in associated pressure and flow rate. However, the development of wave energy converter technology relies significantly on model scale testing, which is often scaled using the Froude criterion. This scaling method are not appropriate for the modelling of air compressibility and introduces uncertainties in the prediction the performance results at full-scale. To account for these effects, methods have been derived to more accurately represent the effect of air compressibility at small scale, one of which requires scaling the air chamber volume by the scale factor squared as opposed to the traditional scale factor cubed following the Froude criterion methodology [1]. This paper examines a preliminary investigation into the effect of air compressibility through hydrodynamic experimentation of a bent duct OWC device, from which the behaviour of the obtained results are compared with the expression proposed analytically by Sarmento and Falcao [1].
Item Details
| Item Type: | Refereed Conference Paper |
|---|---|
| Keywords: | oscillating water column, wave energy converter, air compressibility, hydrodynamic experimentation |
| Research Division: | Engineering |
| Research Group: | Maritime engineering |
| Research Field: | Ocean engineering |
| Objective Division: | Energy |
| Objective Group: | Renewable energy |
| Objective Field: | Wave energy |
| UTAS Author: | Howe, D (Dr Damon Howe) |
| UTAS Author: | Nader, J-R (Dr Jean-Roch Nader) |
| UTAS Author: | MacFarlance, G (Associate Professor Gregor MacFarlane) |
| ID Code: | 128702 |
| Year Published: | 2018 |
| Deposited By: | NC Maritime Engineering and Hydrodynamics |
| Deposited On: | 2018-10-08 |
| Last Modified: | 2019-03-21 |
| Downloads: | 60 View Download Statistics |
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