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Steady and Unsteady Numerical Simulation on Flow Field of a 1.5MW Wind Turbine
Received date: 2016-06-11
Revised date: 2016-07-11
Online published: 2016-08-30
This paper conducted a research on the aerodynamic characteristics of megawatt wind turbine’s 3D model using the Computational Fluid Dynamics (CFD) method. A 1.5 MW wind turbine’s 3D model was proposed as an example. For the blades including three airfoils, the improved Wilson’s method was used for aerodynamic design. The blades were optimized by finding the best Reynolds number of various sections. By using FLUENT software, a 3D model of the whole turbine was established. Flow field was designed and divided into grids, and boundary conditions were set. By using steady and unsteady CFD methods, the model under rated wind speed condition was calculated to study its pressure, stalling characteristics and other aerodynamic characteristics. The results show that: average pressure on the back of the rotor for unsteady simulation is lower than that for steady simulation, which is caused by tip output increase and increases the pressure difference and the output power of the rotor; rotation leads to fluid separation delay on the wind blades, and produces a higher lift coefficient.
LIU Yi-fan , ZHONG Lin-juan , YANG Tao , HUANG Shu-hong . Steady and Unsteady Numerical Simulation on Flow Field of a 1.5MW Wind Turbine[J]. Advances in New and Renewable Energy, 2016 , 4(4) : 266 -271 . DOI: 10.3969/j.issn.2095-560X.2016.04.002
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