The Research Of Hydrodynamic Mechanism And Performance Of A Swing-type Device For River/Ocean Water Flow Energy Coversion

This thesis is mainly to calculate the hydrodynamic performance of a new swing-type device for the conversion of renewable river/ocean water flow energy.Firstly, the hydrodynamic forces acting on the blade and the motion characters of the device components are analyzed, and then the math model of the device simulation and the simulation program are established. Under the same condition, the contrasts between the simulation program's calculation and the water channel model test results show the validation of simulation program and the math model of the device simulation. It has important means for understanding the device work deeply and improving it on in the future.Secondly, the results of the water channel model test are deeply analyzed and the conditions when the model performs well are concluded. It also has analyzed the reason that the volt and the blade's velocity fluctuant and put forward a method to predigest the test results.Thirdly, the theoretical deduction and programming of the classic single-disk single-streamtube model are accomplished and the hydrodynamic performance of the flat plane has been analyzed by the program. According to the contrast between the program's calculation and the water channel model test results, it validates the single-disk single-streamtube model and is considered to be a reliable tool for the prophase evaluation in the future engineering practice.Finally, the hydrodynamic performance of another blade (NACA0018) is calculated using the single-disk single-streamtube program. A contrast between the hydrodynamic performance of the flat plate and the NACA0018 are made. The reason why the blade with an airfoil of NACA0018 has a better hydrodynamic performance are studied.