# Simulation of the flow around a horizontal axis wind turbine with three blades

Wind energy is primarily used to generate electricity. Wind turbine systems in the United States, Europe, India, and increasingly in some places else in the past decade, have been enhanced by the development of technologies that provide relatively high wind power efficiency. The key process of converting kinetic energy of the movement of air to the mechanical energy of the shaft is the rotation of the turbine. Similar to solar power, one of the main challenges with wind power is interruption and diversity that requires regular operation settings as well as strategies for integrating wind power into the network.

Construction and testing of wind turbines in various dimensions, shapes and types will cost a lot. For this reason, the simulation and analysis of these turbomachineries can be a great help to the industry and greatly reduce the cost of this technology.

In this analysis, it has been tried to simulate the flow around a horizontal winding turbine with three blades, using Ansys Fluent software.

### Geometry and Mesh

The geometry required for this analysis was generated by Ansys Design Modeler software. The meshing required for this analysis was also generated by Ansys Meshing software. The type of meshing used in this analysis is structural. The total number of cells produced for this geometry is 5508247 cells.

### Model

In this analysis, the viscosity model K-epsilon RNG has been used to check the fluid flow. The Standard Wall Functions is also used near the wall.

In this analysis, Mesh Motion has been used to model spin rotations. The rotor velocity is also assumed to 144 rpm.

### Boundary Conditions

The inlet for this analysis is defined as Velocity Inlet and its value is defined as 12 m/s. The wind turbine body is considered to be rotating as a Moving Wall. outlet is also considered as Pressure Outlet. The domain of the solution is also defined as Wall.

### Discretization of equations

In this analysis, the SIMPLE formulation algorithm is used to discretize the velocity and pressure coupling equations. The Momentum equation is also discretized into Second Order Upwind.

The results are presented as velocity contours as well as streamlines.

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