The Crespo and Hernandez TI empirical correlation

Notes¶

Reference: “Turbulence characteristics in wind-turbine wakes” A. Crespo, J. Hernandez https://doi.org/10.1016/0167-6105(95)00033-X

For the wake diameter we use Eqns. (17), (15), (4), (5) from

doi:10.1088/1742-6596/625/1/012039

Attributes¶

a_near: float

Model parameter

a_far: float

Model parameter

e1: float

Model parameter

e2: float

Model parameter

e3: float

Model parameter

use_ambti: bool

Flag for using ambient TI instead of local wake corrected TI

sbeta_factor: float

Factor multiplying sbeta

near_wake_D: float

The near wake distance in units of D, calculated from TI and ct if None

wake_k: foxes.core.WakeK

Handler for the wake growth parameter k

Public members¶

CrespoHernandezTIWake(superposition, use_ambti=False, ...)[source]

Constructor.

__repr__()[source]

Return repr(self).

sub_models()[source]

List of all sub-models

new_wake_deltas(algo, mdata, fdata, tdata)[source]

Creates new empty wake delta arrays.

calc_wake_radius(algo, mdata, fdata, tdata, downwind_index, x, ct)[source]

Calculate the wake radius, depending on x only (not r).

calc_centreline(algo, mdata, fdata, tdata, downwind_index, ...)[source]

Calculate centre line results of wake deltas.

initialize(algo, verbosity=0, force=False)[source]

Initializes the model.

calc_wakes_x_r(algo, mdata, fdata, tdata, downwind_index, x, r)[source]

Calculate wake deltas.

calc_wakes_x_yz(algo, mdata, fdata, tdata, downwind_index, x, yz)[source]

Calculate wake deltas.

contribute(algo, mdata, fdata, tdata, downwind_index, ...)[source]

Modifies wake deltas at target points by contributions from the specified wake source turbines.

finalize_wake_deltas(algo, mdata, fdata, amb_results, wake_deltas)[source]

Finalize the wake calculation.

property affects_downwind

Flag for downwind or upwind effects on other turbines

classmethod new(wmodel_type, *args, **kwargs)[source]

Run-time wake model factory.

property model_id

Unique id based on the model type.

var(v)[source]

Creates a model specific variable name.

property initialized

Initialization flag.

load_data(algo, verbosity=0)[source]

Load and/or create all model data that is subject to chunking.

property running

Flag for currently running models

set_running(algo, data_stash, sel=None, isel=None, verbosity=0)[source]

Sets this model status to running, and moves all large data to stash.

unset_running(algo, data_stash, sel=None, isel=None, verbosity=0)[source]

Sets this model status to not running, recovering large data from stash

finalize(algo, verbosity=0)[source]

Finalizes the model.

get_data(variable, target, lookup='smfp', mdata=None, ...)[source]

Getter for a data entry in the model object or provided data sources