"""Computation of aerodynamic polar in low speed conditions."""
# 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.constants import ModelDomain
from fastoad.module_management.service_registry import RegisterOpenMDAOSystem, RegisterSubmodel
from .constants import (
PolarType,
SERVICE_CD0,
SERVICE_CD_TRIM,
SERVICE_INDUCED_DRAG_COEFFICIENT,
SERVICE_INITIALIZE_CL,
SERVICE_OSWALD_COEFFICIENT,
SERVICE_POLAR,
SERVICE_REYNOLDS_COEFFICIENT,
SERVICE_LOW_SPEED_CL_AOA,
)
[docs]@RegisterOpenMDAOSystem("fastoad.aerodynamics.lowspeed.legacy", domain=ModelDomain.AERODYNAMICS)
class AerodynamicsLowSpeed(om.Group):
"""
Models for low speed aerodynamics
"""
[docs] def setup(self):
low_speed_option = {"low_speed_aero": True}
self.add_subsystem(
"compute_low_speed_aero",
RegisterSubmodel.get_submodel(SERVICE_LOW_SPEED_CL_AOA),
promotes=["*"],
)
ivc = om.IndepVarComp("data:aerodynamics:aircraft:takeoff:mach", val=0.2)
self.add_subsystem("mach_low_speed", ivc, promotes=["*"])
self.add_subsystem(
"compute_oswald_coeff",
RegisterSubmodel.get_submodel(SERVICE_OSWALD_COEFFICIENT, low_speed_option),
promotes=["*"],
)
self.add_subsystem(
"compute_induced_drag_coeff",
RegisterSubmodel.get_submodel(SERVICE_INDUCED_DRAG_COEFFICIENT, low_speed_option),
promotes=["*"],
)
self.add_subsystem(
"comp_re",
RegisterSubmodel.get_submodel(SERVICE_REYNOLDS_COEFFICIENT, low_speed_option),
promotes=["*"],
)
self.add_subsystem(
"initialize_cl",
RegisterSubmodel.get_submodel(SERVICE_INITIALIZE_CL, low_speed_option),
promotes=["*"],
)
self.add_subsystem(
"cd0_wing",
RegisterSubmodel.get_submodel(SERVICE_CD0, low_speed_option),
promotes=["*"],
)
self.add_subsystem(
"cd_trim",
RegisterSubmodel.get_submodel(SERVICE_CD_TRIM, low_speed_option),
promotes=["*"],
)
polar_type_option = {"polar_type": PolarType.LOW_SPEED}
self.add_subsystem(
"get_polar",
RegisterSubmodel.get_submodel(SERVICE_POLAR, polar_type_option),
promotes=["*"],
)