Water Turbine (Horizontal Axis), ANSYS Fluent CFD Simulation Training

$240.00 Student Discount

The present study investigates the water flow on the horizontal axis water turbine blades so that the purpose of the problem is to investigate the distribution of velocity and pressure on the blade’s wall.


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Geometry, Mesh, and CFD Simulation methodologygy explanation, result analysis and conclusion
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Water Turbine Problem Description

The present study investigates the water flow on the horizontal axis water turbine (HAWT) blades so that the purpose of the problem is to investigate the distribution of velocity and pressure on the wall of the blade by ANSYS Fluent software. There are two areas around the blades, including a cylindrical area just around the blades and a large area around the cylinder. The flow of water in the large outer space behaves as a normal flow, while in the cylindrical region around the blades, the rotational flow is caused by the rotational motion of the blades.

CFD Assumption

To simulate the present problem, several assumptions are considered:

The simulation is Steady State. Because the present turbine is of horizontal axis type and therefore time will not affect drag and lift forces.

The solver is Pressure-Based.

The Gravity Force is ignored.

Geometry and Mesh of the Water Turbine

The present model is designed in 3-D form so that the section of the turbine blades is a S814-type airfoil whose coordinates are obtained from the Airfoil Tools website and output in the form of a notepad file. Since the airfoil cross section of the blades decreases or increases with different scales at a given scale, excel is used to define the coordinates of the blades at different points. Each airfoil section is then plotted in SOLIDWORKS software at appropriate angles and coordinates and then inserted into the Design Modeler software to design the blades and axis of the turbine. In the Design Modeler software, we create a rotational water flow around the turbine blades and a large space designed as a normal water flow space.

An Unstructured mesh was performed using ANSYS Meshing software. To increase the accuracy of the modeling, the boundary layer mesh on the surfaces of the turbine blades was used and the number of cells produced was 4270222.

Water Turbine CFD Simulation

Here is a summary of the steps in the table to define and solve the problem:

k-omega Viscous model
SST k-omega model
Boundry conditions
Velocity inlet Inlet type
1 m.s-1 velocity
Pressure outlet Outlet type
0 Pa gauge pressure
wall Walls type
stationary wall all walls
Solution Methods (water turbine)
Simple   Pressure-velocity coupling
Second-order upwind pressure Spatial discretization
Second-order upwind momentum
Second-order upwind turbulent kinetic energy
Second-order upwind turbulent dissipation rate
Initialization (water turbine)
Standard Initialization method
-1 m.s-1 velocity (z)

Frame Motion Method

The purpose of the present simulation is to investigate the effect of water flow on turbine blades. In this case, the turbine blades rotate at a rotational speed of 191 rpm and the water in the area surrounding the blades is stationary. Using the above method, the blades can be assumed to be constant and the flow of water around the blades is assumed to be a rotating zone with the same rotational speed of 191 rpm around the Z axis. Also, since the simulation is Steady State, the Mesh Motion option is disabled because it is used when the time effect must be applied to the problem solving and the purpose of the problem is to define the rotational speed for the blade.

2 reviews for Water Turbine (Horizontal Axis), ANSYS Fluent CFD Simulation Training

  1. Maybelle Stracke

    How can this simulation help in the CFD course project that I have taken in university this term?

    • MR CFD Support

      This simulation can provide valuable insights into the performance of a 3-blade horizontal axis water turbine, helping you optimize its design and operation for maximum efficiency.

  2. Olen D’Amore

    Hi, it was good training, the teacher is clear in his expression, good vital points are also said.

  3. Alessandra Conn

    I am working on using mesh motion, can preparing this project help me?

    • MR CFD Support

      Yes, you can do your project according to the tips mentioned. Although, this simulation applies a Steady-State solver while using the Mesh Motion Method needs a Transient solver. But the CFD simulation procedure is the same in more than 90% of the content.

  4. Ernest Schroeder

    How does the simulation model the interaction between the water and the turbine blades?

    • MR CFD Support

      The simulation models the interaction between the water and the turbine blades using the sliding mesh model in ANSYS Fluent, which allows for accurate prediction of the fluid-structure interaction.

  5. Marilou Feest

    How is the power output of the turbine calculated in the simulation?

    • MR CFD Support

      The power output of the turbine is calculated based on the torque exerted on the turbine blades and the rotational speed of the turbine.

  6. Gabriel D’Amore

    Can you customize this simulation to fit my specific needs?

    • MR CFD Support

      Yes, at MR-CFD, we are open to contributions and can accommodate your desired simulations. Please feel free to reach out to us with your specific requirements.

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