Boat Propeller Transient Solution, ANSYS CFX Training
$150.00 Student Discount
- The problem numerically simulates the rotation of Boat Propeller using ANSYS CFX software.
- The geometry is designed in a 3D model with the SpaceClaim software.
- We performed the mesh of the model with ANSYS Meshing software, and the element number equals 4,037,941.
- The solution is carried out in transient form.
- Transient Rotor Stator is set for frame change model of the interfaces.
This project uses the ANSYS CFX modeling application to simulate the rotational movement of a boat propeller in Transient form.
A propeller converts torque, or the force that causes anything to revolve, into thrust. Water moves behind and downhill behind the blades of a rotating propeller, creating a thrust of water from the blades.
Each blade has a specific curved shape that, when it turns, helps to move the water below it and away from it, acting as a foil to do so before pushing the water out from behind.
The 3D geometry of the solution is designed in SpaceClaim software. The propeller is placed at middle of the domain and closer to the inlet. The waterflow enters the domain with the velocity of 20m/s while the propeller rotates with the rotational velocity of 1500 rad/sec.
The simulation is carried out for 0.08sec.
Then the geometry is connected to the ANSYS Meshing software. The elements with a high quality are produced in tetrahedral type.
Furthermore, 5 layers of inflation is set around the circle which results in elements equal to 1,746,106 and 2,291,835 for stationary and rotating zones, respectively.
Methodology: Boat Propeller Transient Solution
The simulation runs considering time (Transient state). Gravitational impacts are also disregarded.
The turbulence model is Shear Stress Transport (k-ԑ SST).
The domain motion of the propeller zone is set to rotating. Also, the Frame Change/Mixing Model of the interfaces of rotationary and stationary zones are set to Transient Rotor Stator.
The Advection Scheme, Transient Scheme and Turbulence Numeric are set to upwind, second order backward order and First order, respectively.
At the end of the solution process, two-dimensional contours, vectors and streamlines related to velocity, pressure, Eddy viscosity and the Turbulence Kinetic Energy are obtained.
As shown in the figures, the pressure amount on the propeller is visible.
The periodic behavior of waterflow over time is displayed in animations exported from CFD-Post software.
Additionally, if you give closer attention, you can see the vortexes behind the propeller via the vectors and streamlines.