| Numerical Simulation and Experimental Investigation on Performance of the Wells Turbine in Irregular Oscillating Flow |
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| 作者姓名： | 黄忠洲 蒋念东 余志 |
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| 作者单位： | Department of Thermal Science and Energy Engineering，The University of Science and Technology of China，Guangzhou Institute of Energy Conversion，Chinese Academy of Sciences，Department of Applied Mechanics and Engineering，Zhongshan University Hefei 230026，China，Guangzhou Institute of Energy Conversion，Chinese Academy of Sciences，Guangzhou 510070，China，Guangzhou 510070，China，Guangzhou 510275，China |
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| 摘 要： | The Wells turbine is an axial-flow air-turbine designed to extract energy from ocean waves. An important consideration is the self-starting capability of the Wells turbine, a phenomenon encountered where the turbine accelerate by itself up to a certain speed for the best turbine performance. In order to clarify the self-starting characteristic and running performance of the Wells turbine in an irregular oscillating flow, a numerical simulation process is established in this paper on the rational assumption of quasi-steady flow conditions. Both self-starting characteristics and running performance are obtained through the numerical simulation and subsequently compared with the experimental data achieved on a computer-controlled oscillating flow test rig which could realize some irregular oscillating flow according to the specified spectrum. Results show that the self-starting time decreases with the increase of the significant wave height and the mean frequency of the irregular oscillating flow. Therefor
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Numerical Simulation and Experimental Investigation on Performance of the Wells Turbine in Irregular Oscillating Flow |
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| HUANG Zhongzhou.Numerical Simulation and Experimental Investigation on Performance of the Wells Turbine in Irregular Oscillating Flow[J].China Ocean Engineering,2001(3):407-416. |
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| Authors: | HUANG Zhongzhou |
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| Abstract: | The Wells turbine is an axial-flow air-turbine designed to extract energy from ocean waves. An important consideration is the self-starting capability of the Wells turbine, a phenomenon encountered where the turbine accelerate by itself up to a certain speed for the best turbine performance. In order to clarify the self-starting characteristic and running performance of the Wells turbine in an irregular oscillating flow, a numerical simulation process is established in this paper on the rational assumption of quasi-steady flow conditions. Both self-starting characteristics and running performance are obtained through the numerical simulation and subsequently compared with the experimental data achieved on a computer-controlled oscillating flow test rig which could realize some irregular oscillating flow according to the specified spectrum. Results show that the self-starting time decreases with the increase of the significant wave height and the mean frequency of the irregular oscillating flow. Therefore, it is possible to predict accurately the performance of the Wells turbine by computer simulation. |
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| Keywords: | wave energy renewable energy Wells turbine irregular oscillating flow fluid machinery |
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