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NREL / floris

A controls-oriented engineering wake model.
http://nrel.github.io/floris
BSD 3-Clause "New" or "Revised" License
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Heterogeneous wind direction and heterogeneous turbulence intensity. #852

Closed CaiZhiming-HHU closed 6 months ago

CaiZhiming-HHU commented 6 months ago

Hello, I recently read a paper: Design and analysis of a wake model for spatially heterogeneous flow. This article mainly describes the implementation of heterogeneous flow. I have two questions about it.

  1. What is the heterogeneous flow interpolation method? I noticed that the FLORIS-3.5 code uses linear interpolation using SciPy's LinearNDInterpolator. However, the paper proposes to use Delaunay triangulation and Barycentric interpolation. How can I implement the interpolation method in the paper?implement the interpolation method in the paper?
  2. In addition to heterogeneous wind speed, the paper also mentions heterogeneous wind direction and heterogeneous turbulence intensity. However, in the code of FLORIS-3.5, I only saw the heterogeneous wind speed function implemented (using speed_multipliers under different x,y and z). So how do I achieve heterogeneous wind direction and heterogeneous turbulence intensity?
yinghanguan commented 6 months ago

Hello, I would like to ask you how to adjust the pitch angle β of the fan in floris and by what parameter. thanks!!!

CaiZhiming-HHU commented 6 months ago

Hello, I would like to ask you how to adjust the pitch angle β of the fan in floris and by what parameter. thanks!!!

I think only by modifying the thrust coefficient curve and power coefficient curve can the pitch angle change be realized.

misi9170 commented 6 months ago

Hello, I would like to ask you how to adjust the pitch angle β of the fan in floris and by what parameter. thanks!!!

I think only by modifying the thrust coefficient curve and power coefficient curve can the pitch angle change be realized.

@yinghanguan , @CaiZhiming-HHU is correct here---the effect of a change in pitch angle will need to be captured in the turbine power and thrust coefficients. This is already what is done above rated power---the Cp and Ct values decrease above rated, modeling the effect of increasing the blade pitch angle to maintain the rated rotor speed.

misi9170 commented 6 months ago

@CaiZhiming-HHU , regarding your question:

The current implementation of Floris only supports wind speed heterogeneity. If you need wind direction and turbulence intensity heterogeneity, this is available in Floris v2.

Support for heterogeneous wind directions and turbulence intensities was not brought over to Floris v3 (the current version), because the vectorization of much of Floris was difficult to reconcile with wind direction heterogeneity. The upcoming release of Floris v4 will also support only wind speed heterogeneity, and we do not currently have plans to reimplement wind direction heterogeneity at this time.

See also #803.

CaiZhiming-HHU commented 6 months ago

@CaiZhiming-HHU , regarding your question:

The current implementation of Floris only support wind speed heterogeneity. If you need wind direction and turbulence intensity heterogeneity, this is available in Floris v2.

Support for heterogeneous wind directions and turbulence intensities was not brought over to Floris v3 (the current version), because the vectorization of much of Floris was difficult to reconcile with wind direction heterogeneity. The upcoming release of Floris v4 will also support only wind direction heterogeneity, and we do not current have plans to reimplement wind direction heterogeneity at this time.

See also #803.

Thank you very much for your response