def test_NOJ_two_turbines_in_row(wdir, x, y):
# Two turbines in a row, North-South
# Replicate result from: Jensen, Niels Otto. "A note on wind generator interaction." (1983).
windTurbines = NibeA0
site = UniformSite([1], 0.1)
wfm = NOJ(site, windTurbines)
wfm.verbose = False
h_i = [50, 50, 50]
WS_eff_ilk = wfm.calc_wt_interaction(x, y, h_i, [0, 0, 0], wdir, 8.1)[0]
ws_wt3 = 8.1 - np.hypot(8.1 * 2 / 3 * (20 / 26)**2, 8.1 * 2 / 3 *
(20 / 30)**2)
npt.assert_array_almost_equal(WS_eff_ilk[:, 0, 0], [8.1, 4.35, ws_wt3])
def test_NOJ_6_turbines_in_row():
n_wt = 6
x = [0] * n_wt
y = -np.arange(n_wt) * 40 * 2
site = UniformSite([1], 0.1)
wfm = NOJ(site, NibeA0)
wfm.verbose = False
WS_eff_ilk = wfm.calc_wt_interaction(x, y, [50] * n_wt, [0] * n_wt, 0.0,
11.0)[0]
np.testing.assert_array_almost_equal(
WS_eff_ilk[1:, 0, 0], 11 - np.sqrt(
np.cumsum(
((11 * 2 / 3 * 20**2)**2) / (20 + 8 * np.arange(1, 6))**4)))