非对称翼冲击式透平动叶片弯扭角的三维数值模拟研究

he impulse turbine, as an important component for the second energy conversion of Oscillating Water Column (OWC) wave energy converter, is capable of converting low pressure pneumatic energy into mechanical shaft power in the condition of bi-directional flow. Nowadays, the investigation on traditional symmetric impulse turbine has been comprehensive and systematic. However, to optimize the structure of turbine for higher efficiency is still the ultimate purpose and direction for the study of impulse turbine. In the present paper, a new unsymmetric bladed impulse turbine with twisted rotor blades is proposed and has been studied with computational fluent dynamics technology (CFD). On basis of the satisfactory coherence between experimental and numerical data, the Multiple Reference Frame model has been employed to exploit the effects of twisted angle of rotor blade on turbine performance with the help of Gambit2.4 and Fluent14.5. It can be concluded that the unsymmetric bladed impulse turbine with 5 twisted rotor blades is predicted to obtain a higher turbine efficiency.