| Comparisons between vertical axis wind turbine(VAWT) and horizontal axiswind turbine(HAWT), both of them have the same theoretical basis in the designaspect. However, it is different in the aerodynamic performance between them, so theway designed the VAWT is impossible used completely as the way of HAWT. Thoughmany home and abroad scholar reached the main effects of the aerodynamicperformance of the VAWT in many aspects, the theory is not perfect. In thispaper,making use of the design theory of VAWT to preliminarily devise various parametersof the wind turbine,then the aerodynamic performance of a VAWT is calculated based on thetheory model of double-multiple streamtube model by means of MATLAB software in orderto improve the performance of the wind turbine;and the performance of airfoil and windturbine are analysed.The main contents include four parts as follows:1. various parameters of wind turbine is preliminarily confirmed such as balde-sectionchord、 rotor diameter、rotor height、tip speed ratio and so on, by means of relative designtheory of Vawt,then We use the fluent software to simulate aerodynamic performance ofthree kinds of symmetrical airfoil to determine the airfoil of wind turbine.2. The power of wind turbine is calculated based on double-multiple streamtubemodel by menans of Matlab software.in order to ensure the performancerequirement,we optimize the rotor parameters,and analyse influence of differentparameters to the aerodynamic performance of wind trubine.3. In order to improve CFD simulation accurate of wind turbine,in this paper,weanalyse different turbulent models,different boundary conditions,different grid distributionsand different Reynolds to affect the calculate accuracy of aerodynamic performance ofairfoil.4. In order to analyse the flow field characteristics of VAWT.Numercalsimulation on unsteady flow is done based on moving mesh by means of Fluentsoftware.Thus,we compare the result of numerical simulation with the result fromMatlab program. |
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