"""Computation of form drag for whole aircraft."""
# This file is part of FAST-OAD : A framework for rapid Overall Aircraft Design
# Copyright (C) 2021 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 openmdao.api as om
from fastoad.module_management.service_registry import RegisterSubmodel
from ..constants import (
SERVICE_CD0,
SERVICE_CD0_FUSELAGE,
SERVICE_CD0_HORIZONTAL_TAIL,
SERVICE_CD0_NACELLES_PYLONS,
SERVICE_CD0_SUM,
SERVICE_CD0_VERTICAL_TAIL,
SERVICE_CD0_WING,
)
[docs]@RegisterSubmodel(SERVICE_CD0, "fastoad.submodel.aerodynamics.CD0.legacy")
class CD0(om.Group):
"""
Computation of form drag for whole aircraft.
Computes and sums the drag coefficients of all components.
Interaction drag is assumed to be taken into account at component level.
"""
[docs] def initialize(self):
self.options.declare("low_speed_aero", default=False, types=bool)
[docs] def setup(self):
low_speed_option = {"low_speed_aero": self.options["low_speed_aero"]}
self.add_subsystem(
"cd0_wing",
RegisterSubmodel.get_submodel(SERVICE_CD0_WING, low_speed_option),
promotes=["*"],
)
self.add_subsystem(
"cd0_fuselage",
RegisterSubmodel.get_submodel(SERVICE_CD0_FUSELAGE, low_speed_option),
promotes=["*"],
)
self.add_subsystem(
"cd0_ht",
RegisterSubmodel.get_submodel(SERVICE_CD0_HORIZONTAL_TAIL, low_speed_option),
promotes=["*"],
)
self.add_subsystem(
"cd0_vt",
RegisterSubmodel.get_submodel(SERVICE_CD0_VERTICAL_TAIL, low_speed_option),
promotes=["*"],
)
self.add_subsystem(
"cd0_nac_pylons",
RegisterSubmodel.get_submodel(SERVICE_CD0_NACELLES_PYLONS, low_speed_option),
promotes=["*"],
)
self.add_subsystem(
"cd0_total",
RegisterSubmodel.get_submodel(SERVICE_CD0_SUM, low_speed_option),
promotes=["*"],
)