Can anyone help me in Computational modeling of Wind Turbine's Wake? I am just not sure to how to start this project in 2D? assuming an actuator disc doesn't always work... any new ideas?
Wind Turbine wake modelling is not a simple problem and simply selecting one CFD package over another is not the answer.
Modelling the flow over an aerofoil section requires a fine and rather sophisticated mesh to capture the boundary layer separation. This means elements in the 1mm range on the blade surface.
Problem is an wind turbine is massive which means a lot of elements. The second issue is the wake zone, what exactly are you trying to measure or simulate? If it's related to the performance of the blade section then you really don't care what happens downstream because this has no influence on the blade past 1 rotation (turbulence from the proceeding blade due to the solidity factor).
If however you are trying to model the low frequency noise that is driving everyone mad then you need to accurately capture the pressure pulsations.
That is an extremely difficult problem to solve because all of the current CFD commercial packages are highly diffusive due to the dominate face centered solvers.
I will use in 3D in my MS thesis. I have project for CFD subject course and time limit is just 1.5 month!!
I use FLUENT normally and for Hypersonic Flows i used MB_CNS in my UG project.
you can do this very easily using Fluent... For the modelling of wake take special care for the generation of grid.....u can use Gridgen for preparation of grid..these two works good...
Were you able to model it? In only 1.5 months? I'm interested to hear from your experiences.
No bro..i could not! I changed the topic two weeks before presentation ;-)
Wind Turbine wake modelling is not a simple problem and simply selecting one CFD package over another is not the answer.
Modelling the flow over an aerofoil section requires a fine and rather sophisticated mesh to capture the boundary layer separation. This means elements in the 1mm range on the blade surface.
Problem is an wind turbine is massive which means a lot of elements. The second issue is the wake zone, what exactly are you trying to measure or simulate? If it's related to the performance of the blade section then you really don't care what happens downstream because this has no influence on the blade past 1 rotation (turbulence from the proceeding blade due to the solidity factor).
If however you are trying to model the low frequency noise that is driving everyone mad then you need to accurately capture the pressure pulsations.
That is an extremely difficult problem to solve because all of the current CFD commercial packages are highly diffusive due to the dominate face centered solvers.
thank you peter for your detailed reply....
i was trying for power turbine........... through virtual blade simulation which was done for rotor of helicopter.....
i have simulated aerofoil section ........... anyway........ i am not interested in wind turbine now.... but i have to decide thesis for my MS....
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