The energy characteristics test for new type of bidirectional shaft tubular turbine
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Abstract:
In order to research the energy characteristics of new type, high efficiency, low head, large discharge, bidirectional shaft tubular turbine for a tidal power station, we make the mode test and numerical simulation, and measure parameters such as the head, discharge and torque under positive and negative, different turbine blade angle, different guide vane opening, and draw the turbine model synthetic characteristic curve, and the curve is compared with numerical simulation results. The test results indicate that, when the turbine under rated operating mode, positive efficiency can reach 89.68%, reverse efficiency can reach 84.08%, which can satisfy the operation requirements of tidal power station; the results we test can meet the numerical simulation results which validate the reliability of numerical simulation results, by means of the compassion between prototype and model efficiency and CFD numerical simulation results, we found that when deviated from designed point but keep the rated head, the affection which the discharge change caused by changing the guide vane opening is a bit greater than which the discharge change caused by changing the blade angle.
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