# This file is part of FAST-OAD_CS23 : A framework for rapid Overall Aircraft Design
# Copyright (C) 2022 ONERA & ISAE-SUPAERO
# FAST is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <https://www.gnu.org/licenses/>.
import numpy as np
import openmdao.api as om
import fastoad.api as oad
from fastga.models.aerodynamics.constants import SUBMODEL_CY_BETA_WING
[docs]@oad.RegisterSubmodel(
SUBMODEL_CY_BETA_WING, "fastga.submodel.aerodynamics.wing.side_force_beta.legacy"
)
class ComputeCyBetaWing(om.ExplicitComponent):
"""
Class to compute the contribution of the wing to the side force coefficient due to sideslip.
Based on :cite:`roskampart6:1985` section 10.2.4.1
"""
[docs] def setup(self):
self.add_input("data:geometry:wing:dihedral", val=np.nan, units="deg")
self.add_output("data:aerodynamics:wing:Cy_beta", units="rad**-1")
self.declare_partials(of="*", wrt="*", method="exact")
[docs] def compute(self, inputs, outputs, discrete_inputs=None, discrete_outputs=None):
outputs["data:aerodynamics:wing:Cy_beta"] = -0.00573 * inputs["data:geometry:wing:dihedral"]
[docs] def compute_partials(self, inputs, partials, discrete_inputs=None):
partials["data:aerodynamics:wing:Cy_beta", "data:geometry:wing:dihedral"] = -0.00573