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-   -   Rotating Wind turbine rotor model step up (https://www.cfd-online.com/Forums/cfx/117531-rotating-wind-turbine-rotor-model-step-up.html)

 shiyun May 10, 2013 03:36

Rotating Wind turbine rotor model step up

3 Attachment(s)
Hi everyone

I am doing a rotating wind turbine simulation via ANSYS CFX, I found it is difficult to find a tutorial related to this kind of model, so here I would like to share my CFX setting to those fresh people who has no idea how to set up this simulation.
MOREOVER, I also hope those real sophisticated experts can help and correct my setting as the simulation result is NOT good.

Geometry: the blade is 2.5m, the rotor is full model of dual blades.
Fluid domain:
1.Stationary cylinder---Up stream 10m, down stream 50m, Diameter 25m. 2.Rotating thin disk: radius is 0.1m longer than rotor radius, 0.1m in front and behind of the rotor.

Mesh: Structured mesh in stationary domain, unstructured mesh in rotating domain.

Material: Air ideal gas
Reference pressure: 1 atm
Turbulent model: SST

Stationary domain
Inlet: 10m/s in axial directon
Outlet: 0 Pa
FF wall: Free slip wall

Rotating domain
R speed: 320 rpm
rotor wall: No slip wall

Interface: each surface of the rotating disk domain is a individual interface connect to the Stationary fluid, use general connection ---> Frozen Rotor

However, I found the simulation result is not reasonable, eg, the fluid is discontinuous between the rotating and stationary domain, and unexpected velocity domain in wake region.

I upload the mesh and simulation result pictures. and draw out the problems.
Please give me some suggestion to improve this simulation.

 shiyun May 13, 2013 01:25

anybody can help？

 ghorrocks May 13, 2013 06:33

This is an FAQ: http://www.cfd-online.com/Wiki/Ansys..._inaccurate.3F

In this case, I suspect:
* You have not run the simulation long enough to blow the wake fully downstream.