Abstract
With the strong demands on the further development of economy and energy, tidal energy, with own green and renewable advantages, has gained more and more attention, of which as the main application type, bulb tubular turbines have played an important role in the power exploitation. Characteristic of low head and large discharge, flow properties of a bulb turbine turn out to be more complicated, which seriously affects the actual operation performance of the station. To promote wide development of tidal energy, it is ritual to deeply dig into the performance of bulb turbine. In this paper, a bulb-type model turbine used for tidal energy is taken for example. By means of CFD method and model test, hydraulic specifications, like efficiency and cavitation properties, have been obtained and compared in case of different conditions. Through the contrast between numerical simulation and model test, a novel corrected method relative to the low-head tidal turbine is brought out for further adaptation to execute the hydraulic, dynamic and stability analysis.
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