Numerical Simulation Of Wind Turbine Dynamic Magnification Of The Tip Plus A Small Wing

This paper is a research which a tip vane is a flat of V type and S type which is fitted onthe blade tip. It changes the flow flied characteristic around the wind turbine, thereby,change the performance of the wind turbine----power, pressure and velocity performance.The aim of The wind turbine with a tip vane decrease the vortex on the blade tip and theflow loss and bring the power augmentation, and is that the more wind energy is convertedto the electric energy.In this paper ,we simulate dynamic magnification performance of horizontal axis windturbine and horizontal axis wind turbine with a tip vane by software of CFD----FLUENT.During the calculation, we base on N-S equation, choice 3-D, steady, implicit solver.Turbulence model is k-ωSST. Discretization is SECOND ORDER UPWIND.Pressure-velocity coupling is a typical SIMPLE scheme. We simulate the status of thesteady running wind turbine with the tip vane of the different longitudinal and transyersedimensions, the ratio of the leading edge to the trailing edge length, the front camber angleand back camber angle and endue changing regularity of power augmentation of a windturbine with a tip vane. It accord with the change tendency of the wind turbine theory.After compared with the experiment results, computational results have some error to theexperiment results, but it is same with the variation tendency of the experimental values.The results shows the tip vane have the augmentation action surely. Subsequently thepressure performance and velocity performance of the wind turbine with a tip vane arecompared with the wind turbine with a tip vane, and we gained the change of the blade tipof the wind turbine with the tip vane. Thereby we analyze and disclosure the dynamicaugmentation principle of the wind turbine with the tip vane, Meanwhile, after comparingcomputational results with experiment results, we think the method of calculation andsimulation to the wind turbine with the tip vane is correct. This method is foundation to thecalculation of the different fitting angle and wind direction of the tip vane later.