On Study Of Hydrodynamic Performance Of The Spring-Controlling Of Vertical-axis Variable-Pitch Turbine

In this paper, theoretical and experimental investigation on the newly developed equipment of renewable tidal-current energy spring-control vertical-axis variable-pitch turbine is presented. Much attention is focused on the comparison and studying of the hydrodynamic performance of three kinds of turbines and focused on the probing into the hydrodynamic mechanism of the new turbine. All of these are the important base of the selecting of turbine, the designing of hydrodynamic performance, and the general designing of marine tidal-currents energy plant.At first experimental device and three test modals of the turbine in presented. It gave the particular description of experimental plan which is aimed at the parameter of the turbine.Then by dealing with a series of modal test, the experimental data on hydrodynamic performance of the turbine are concluded. We discussed the influences of solidity, spring rate, the position of blade shaft, blade angle areas and channel device on the energy conversion coefficient of the spring-control vertical-axis variable-pitch turbine.Mathematical modal based on double-disk multi-streamtube method are presented in order to calculate the hydrodynamic performance of the turbine including two blade kinetic rules. One is based on calculation result of controlling gear; the other is the experimental data. And then compare the result which is calculated by two methods with experimental data.At last we used Borland C++ Builder program to design hydrodynamic performance program of vertical-axis variable-pitch turbine in order to help hydrodynamic performance calculation of the turbine in future.