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How to scale the turbine size in QBlade

Hi everyone, I have two question, the first one is,  is it possible to scale the wind turbine blade in QBlade, or for example, can I export the geometry to another software, scale the geometry and then import this new geometry in QBlade? I have tried to do the latter, but I can’t import the geometry. Any recommendations?

The second question is, when considering a float for a wind turbine, is the speed taken into account for power production only the wind speed or is it a wind speed that considers the programmed wind speed and the speed induced by the float?



Hello Denisse,

the “Blade Design Module” has a scaling feature which can be used to scale the radial position, chord length or twist angle of a blade design.

You can also directly edit a blade desfinition file (.bld) to modify a blade design (see also the Documentation).

Regarding your second question: when simulating a floating wind turbine all relative velocities, resulting from blade rotation, blade deflection and floater movement are taken into account to evaluate the aerodynamics.




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Denisse Arriagada has reacted to this post.
Denisse Arriagada

Hi David,

Thank you for your answers, it have been very helpful for my.

I take the opportunity to ask other questions, when performing a simulation there is interaction between the wake of the turbine blades in the aerodynamic model of QBlade?

Is it possible to obtain pressure fields on the blades and the deformation of the blades as a function of the wind?



Hi Denisse,

the effect of the wake onto the rotor can be modeled in two ways:

  1. By using the Blade Element Momentum Method
  2. Using the Free Vortex Wake method

Both methods yield induced velocities, acting in the rotor plane. Using the Free Vortex Wake method has the advantage that it can also be used to evaluate the wake induced velocities anywhere in the field. This could be used for instance to model the wake interaction between two wind turbines operating in close vicinity.

The blade aerodynamics are modeled using 2-D polar data. From this polar data (if obtained via XFoil from within QBlade) you could obtain the surface pressure on a 2-D airfoil section. During a turbine simulation it is not possible to obtain blade surface pressure measurements, as the surface itself is not resolved.

Since QBlade is an aeroelastics code, you can obtain all deformations of the turbine model (blades, tower, floater, etc.) during any operating condition.