def setup(self):
surfaces = self.options['surfaces']
rotational = self.options['rotational']
num_collocation_points = 0
for surface in surfaces:
mesh = surface['mesh']
nx = self.nx = mesh.shape[0]
ny = self.ny = mesh.shape[1]
num_collocation_points += (ny - 1) * (nx - 1)
num_force_points = num_collocation_points
# Get collocation points
self.add_subsystem(
'collocation_points',
CollocationPoints(surfaces=surfaces),
promotes_inputs=['*'],
promotes_outputs=['coll_pts', 'force_pts', 'bound_vecs'])
# Compute the vortex mesh based off the deformed aerodynamic mesh
self.add_subsystem('vortex_mesh',
VortexMesh(surfaces=surfaces),
promotes_inputs=['*'],
promotes_outputs=['*'])
# Get vectors from mesh points to collocation points
self.add_subsystem('get_vectors',
GetVectors(surfaces=surfaces,
num_eval_points=num_collocation_points,
eval_name='coll_pts'),
promotes_inputs=['*'],
promotes_outputs=['*'])
# Construct matrix based on rings, not horseshoes
self.add_subsystem('mtx_assy',
EvalVelMtx(surfaces=surfaces,
num_eval_points=num_collocation_points,
eval_name='coll_pts'),
promotes_inputs=['*'],
promotes_outputs=['*'])
# Convert freestream velocity to array of velocities
if rotational:
self.add_subsystem('rotational_velocity',
RotationalVelocity(surfaces=surfaces),
promotes_inputs=['*'],
promotes_outputs=['*'])
self.add_subsystem('convert_velocity',
ConvertVelocity(surfaces=surfaces,
rotational=rotational),
promotes_inputs=['*'],
promotes_outputs=['*'])
# Construct RHS and full matrix of system
self.add_subsystem('mtx_rhs',
VLMMtxRHSComp(surfaces=surfaces),
promotes_inputs=['*'],
promotes_outputs=['*'])
# Solve Mtx RHS to get ring circs
self.add_subsystem('solve_matrix',
SolveMatrix(surfaces=surfaces),
promotes_inputs=['*'],
promotes_outputs=['*'])
# Convert ring circs to horseshoe circs
self.add_subsystem('horseshoe_circulations',
HorseshoeCirculations(surfaces=surfaces),
promotes_inputs=['*'],
promotes_outputs=['*'])
# Eval force vectors
self.add_subsystem('get_vectors_force',
GetVectors(surfaces=surfaces,
num_eval_points=num_force_points,
eval_name='force_pts'),
promotes_inputs=['*'],
promotes_outputs=['*'])
# Set up force mtx
self.add_subsystem('mtx_assy_forces',
EvalVelMtx(surfaces=surfaces,
num_eval_points=num_force_points,
eval_name='force_pts'),
promotes_inputs=['*'],
promotes_outputs=['*'])
# Multiply by horseshoe circs to get velocities
self.add_subsystem('eval_velocities',
EvalVelocities(surfaces=surfaces,
num_eval_points=num_force_points,
eval_name='force_pts'),
promotes_inputs=['*'],
promotes_outputs=['*'])
# Get sectional panel forces
self.add_subsystem('panel_forces',
PanelForces(surfaces=surfaces),
promotes_inputs=['*'],
promotes_outputs=['*'])
# Get panel forces for each lifting surface individually
self.add_subsystem('panel_forces_surf',
PanelForcesSurf(surfaces=surfaces),
promotes_inputs=['*'],
promotes_outputs=['*'])
# Get nodal forces for each lifting surface individually
self.add_subsystem('mesh_point_forces_surf',
MeshPointForces(surfaces=surfaces),
promotes_inputs=['*'],
promotes_outputs=['*'])
def test_groundplane(self):
surfaces = get_ground_effect_surfaces()
comp = VortexMesh(surfaces=surfaces)
run_test(self, comp, atol=1e6)
def setup(self):
surfaces = self.options['surfaces']
rotational = self.options['rotational']
num_collocation_points = 0
for surface in surfaces:
mesh = surface['mesh']
nx = self.nx = mesh.shape[0]
ny = self.ny = mesh.shape[1]
num_collocation_points += (ny - 1) * (nx - 1)
num_force_points = num_collocation_points
#----------------------------------------------------------------
# Step 0: Need to calculate a few things prior to transformation.
#----------------------------------------------------------------
# Get collocation points
self.add_subsystem('collocation_points',
CollocationPoints(surfaces=surfaces),
promotes_inputs=['*'])
# Convert freestream velocity to array of velocities
if rotational:
self.add_subsystem('rotational_velocity',
RotationalVelocity(surfaces=surfaces),
promotes_inputs=['cg', 'omega'])
self.connect('collocation_points.coll_pts',
'rotational_velocity.coll_pts')
#----------------------------------------
# Step 1: Transform geometry to PG domain
#----------------------------------------
self.connect('collocation_points.coll_pts', 'pg_transform.coll_pts')
self.connect('collocation_points.bound_vecs',
'pg_transform.bound_vecs')
self.connect('collocation_points.force_pts', 'pg_transform.force_pts')
if rotational:
self.connect('rotational_velocity.rotational_velocities',
'pg_transform.rotational_velocities')
prom_in = ['alpha', 'beta', 'Mach_number']
for surface in surfaces:
name = surface['name']
vname = name + '_def_mesh'
prom_in.append(vname)
self.connect('pg_transform.' + vname + '_pg',
'vortex_mesh.' + vname)
vname = name + '_normals'
prom_in.append(vname)
self.connect('pg_transform.' + vname + '_pg', 'mtx_rhs.' + vname)
self.add_subsystem('pg_transform',
PGTransform(surfaces=surfaces,
rotational=rotational),
promotes_inputs=prom_in)
self.connect('pg_transform.coll_pts_pg', 'coll_pts')
self.connect('pg_transform.bound_vecs_pg', 'bound_vecs')
self.connect('pg_transform.force_pts_pg', 'force_pts')
if rotational:
self.connect('pg_transform.rotational_velocities_pg',
'rotational_velocities')
#---------------------------------------------------
# Step 2: Solve incompressible problem in PG domain
#---------------------------------------------------
# Compute the vortex mesh based off the deformed aerodynamic mesh
self.add_subsystem('vortex_mesh',
VortexMesh(surfaces=surfaces),
promotes_outputs=['*'])
# Get vectors from mesh points to collocation points
self.add_subsystem('get_vectors',
GetVectors(surfaces=surfaces,
num_eval_points=num_collocation_points,
eval_name='coll_pts'),
promotes_inputs=['*'],
promotes_outputs=['*'])
# In the PG domain, alpha and beta are zero.
indep_var_comp = IndepVarComp()
indep_var_comp.add_output('alpha_pg', val=0., units='deg')
indep_var_comp.add_output('beta_pg', val=0., units='deg')
self.add_subsystem('pg_frame', indep_var_comp)
# Construct matrix based on rings, not horseshoes
self.add_subsystem('mtx_assy',
EvalVelMtx(surfaces=surfaces,
num_eval_points=num_collocation_points,
eval_name='coll_pts'),
promotes_inputs=['*_vectors'],
promotes_outputs=['*'])
self.connect('pg_frame.alpha_pg', 'mtx_assy.alpha')
# Convert freestream velocity to array of velocities
# Note, don't want to promote Alpha or Beta here because we are in the transformed system.
prom_in = ['v']
if rotational:
prom_in.append('rotational_velocities')
self.add_subsystem('convert_velocity',
ConvertVelocity(surfaces=surfaces,
rotational=rotational),
promotes_inputs=prom_in,
promotes_outputs=['*'])
self.connect('pg_frame.alpha_pg', 'convert_velocity.alpha')
self.connect('pg_frame.beta_pg', 'convert_velocity.beta')
# Construct RHS and full matrix of system
self.add_subsystem(
'mtx_rhs',
VLMMtxRHSComp(surfaces=surfaces),
promotes_inputs=['freestream_velocities', '*coll_pts_vel_mtx'],
promotes_outputs=['*'])
# Solve Mtx RHS to get ring circs
self.add_subsystem('solve_matrix',
SolveMatrix(surfaces=surfaces),
promotes_inputs=['*'],
promotes_outputs=['*'])
# Convert ring circs to horseshoe circs
self.add_subsystem('horseshoe_circulations',
HorseshoeCirculations(surfaces=surfaces),
promotes_inputs=['*'],
promotes_outputs=['*'])
# Eval force vectors
self.add_subsystem('get_vectors_force',
GetVectors(surfaces=surfaces,
num_eval_points=num_force_points,
eval_name='force_pts'),
promotes_inputs=['*'],
promotes_outputs=['*'])
# Set up force mtx
# Note, don't want to promote Alpha here because we are in the transformed system.
self.add_subsystem('mtx_assy_forces',
EvalVelMtx(surfaces=surfaces,
num_eval_points=num_force_points,
eval_name='force_pts'),
promotes_inputs=['*_force_pts_vectors'],
promotes_outputs=['*'])
self.connect('pg_frame.alpha_pg', 'mtx_assy_forces.alpha')
# Multiply by horseshoe circs to get velocities
self.add_subsystem('eval_velocities',
EvalVelocities(surfaces=surfaces,
num_eval_points=num_force_points,
eval_name='force_pts'),
promotes_inputs=['*'],
promotes_outputs=['*'])
# Get sectional panel forces
self.add_subsystem('panel_forces',
PanelForces(surfaces=surfaces),
promotes_inputs=['*'],
promotes_outputs=['*'])
# Get panel forces for each lifting surface individually
self.add_subsystem('panel_forces_surf',
PanelForcesSurf(surfaces=surfaces),
promotes_inputs=['*'])
#-----------------------------------------------------------
# Step 3: Transform forces from PG domain to physical domain
#-----------------------------------------------------------
prom_out = []
for surface in surfaces:
vname = surface['name'] + '_sec_forces'
prom_out.append(vname)
self.connect('panel_forces_surf.' + vname,
'inverse_pg_transform.' + vname + '_pg')
self.add_subsystem('inverse_pg_transform',
InversePGTransform(surfaces=surfaces),
promotes_inputs=['alpha', 'beta', 'Mach_number'],
promotes_outputs=prom_out)
#---------------------------------------------------------------
# Step 4: Mesh point forces are downstream, already transformed.
#---------------------------------------------------------------
# Get nodal forces for each lifting surface individually
self.add_subsystem('mesh_point_forces_surf',
MeshPointForces(surfaces=surfaces),
promotes_inputs=['*'],
promotes_outputs=['*'])
def test(self):
surfaces = get_default_surfaces()
comp = VortexMesh(surfaces=surfaces)
run_test(self, comp)