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|Title:||HYDRO NUMERICAL MODELLING OF TURBINES FOR FLOATING OWC WATER POWER PLANTS|
HYDRO NUMERICAL MODELLING
FLOATING OWC WATER POWER PLANTS
|Abstract:||Wave energy is the most abundant source of renewable energy in the world. For the last two decades, engineers has been investigating and defining different methods for power extraction from wave motion. Wave power plants with oscillating water column are one of the most promising wave energy converters due to relatively simple construction and the use of conventional and well developed technology. It is the goal of a research project at the Hydraulic Engineering and Applied Hydromechanics Institute at the Technische Universitat Dresden in Germany to analyse the behaviour of a floating Oscillating water column (OWC) energy converter by using numerical and physical models. The first step is to build the numerical model of the several parts of the whole energy converter, in that order turbines come first. The objective of the present work is to compile executable hydro-numerical model for different types of turbine for OWC. Two different turbines, namely Wells turbine and Impulse turbine with guide vanes, are most commonly used around the world for • wave energy generation. The ultimate goal is to optimize the performance of the turbine under actual sea conditions. In the present work, an attempt has been made to carry out the three-dimensional Computational Fluid Dynamics (CFD) analysis of the impulse turbine with fixed guide vanes and Wells turbine used for wave energy conversion. Solid works, ANSYS design modeller and FLUENT 12.1 were used to create a 3-D model of both the turbines. The results for both the turbine were obtained over a wide range of flow coefficients. A comparison of CFD based analysed results was made with the experimental results available from the previous experimental studies for similar system under similar conditions. Satisfactory agreement was obtained with experimental data. Further, degree of insight into flow behaviour was obtained for both the turbines under consideration which may not be possible experimentally. Sizeable areas of separation on the pressure side of the rotor blade were identified toward the tip. The basic objective of the study to benchmark the CFD results with experimental data available in the previous studies and to investigate the performance of both the turbines using CFD has been achieved|
|Appears in Collections:||MASTERS' DISSERTATIONS (Hydrology)|
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