Duct Effect on HAWT Performance, CFD Simulation ANSYS Fluent Training

$270.00 Student Discount

In this project, a horizontal axis wind turbine (HAWT) is modeled in two different cases via Ansys Fluent.

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editable geometry and mesh allows users to create and modify geometry and mesh to define the computational domain for simulations.
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Geometry, Mesh, and CFD Simulation methodologygy explanation, result analysis and conclusion
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Duct Effect on HAWT Performance Problem Description

In this project, Duct Effect on HAWT Performance is simulated in two different cases via Ansys Fluent. Once, without implementing any duct, and in another case, a duct is installed. The study aims to investigate the effect of the duct on turbine performance. Plus, the multi-reference frame (MRF) module is used, and the tip-speed ratio is 2.5.

Geometry & Mesh

The 3D geometry is modeled in Ansys Design Modeler software for both cases. Also, the mesh grid is carried out using Ansys Meshing software. Furthermore, an unstructured grid and boundary layer is generated in the first place and then transformed into polyhedron elements to decrease the computational cost. Therefore, 10506896 & 12216335 elements established the fluid domain, respectively.



CFD Simulation

Several assumptions have been considered to simulate HAWT, including:

  • The simulation is Steady in order to investigate the performance in a working manner.
  • The pressure-based solver type was used due to the incompressibility of the working fluid.
  • Gravitational acceleration effects were ignored.

The following table represents a summary of the solution:


Viscous K-w SST
Fluid Definition method Fluent database
Material name Air
Cell zone condition
Material name Air
Frame Motion -2000rpm
Boundary condition
Inlet Type Velocity inlet
Velocity magnitude 5m/s
Turbulent intensity 5%
Turbulent viscosity ratio 10
Outlet Type Pressure-outlet
Gauge Pressure 0




Type Wall

(Stationary – No-slip condition)

Solver configuration
Pressure-velocity coupling Scheme Coupled
Spatial Discretization Gradient Least squares cell-based
Pressure PRESTO!
Momentum First-order upwind
Turbulent kinetic energy First-order upwind
Turbulent dissipation rate First-order upwind
Initialization Initialization methods Standard Initialization
Run Calculation Number of Iterations 2500


Duct Effect on HAWT Performance Results

After the simulation process, 2D & 3D contours are extracted, as shown below. To assess properly, the torque generated by the turbine blade around the y-axis is reported by ANSYS Fluent. The results show a significant increase in torque which equals 63%! or in other words, the performance of wind turbines. To conclude, in tip-speed-ratio of 2.5 is a great effect but should be observed for different working conditions.

Without Duct With Duct
Wind Turbine Torque [N.m] 0.0031304626 0.0051037854



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