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Verified Commit 4ee56800 authored by Paul Dechamps's avatar Paul Dechamps :speech_balloon:
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(feat) Added 2D validation case for RAE airfoil

Validate 2D transonic capabilities.
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1 merge request!1BLASTER v1.0
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
# Copyright 2022 University of Liège
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# @author Paul Dechamps
# @date 2022
# Imports.
import blast.utils as viscUtils
import numpy as np
from fwk.wutils import parseargs
import fwk
from fwk.testing import *
from fwk.coloring import ccolors
import math
def cfgInviscid(nthrds, verb):
import os.path
# Parameters
return {
# Options
'scenario' : 'aerodynamic',
'task' : 'analysis',
'Threads' : nthrds, # number of threads
'Verb' : verb, # verbosity
# Model (geometry or mesh)
'File' : os.path.dirname(os.path.dirname(os.path.abspath(__file__))) + '/models/dart/rae_2.geo', # Input file containing the model
'Pars' : {'xLgt' : 5, 'yLgt' : 5, 'msF' : 1, 'msTe' : 0.01, 'msLe' : 0.002}, # parameters for input file model
'Dim' : 2, # problem dimension
'Format' : 'gmsh', # save format (vtk or gmsh)
# Markers
'Fluid' : 'field', # name of physical group containing the fluid
'Farfield' : ['upstream', 'farfield', 'downstream'], # LIST of names of physical groups containing the farfield boundaries (upstream/downstream should be first/last element)
'Wing' : 'airfoil', # LIST of names of physical groups containing the lifting surface boundary
'Wake' : 'wake', # LIST of names of physical group containing the wake
'WakeTip' : 'wakeTip', # LIST of names of physical group containing the edge of the wake
'Te' : 'te', # LIST of names of physical group containing the trailing edge
'dbc' : True,
'Upstream' : 'upstream',
# Freestream
'M_inf' : 0.729, # freestream Mach number
'AoA' : 2.31, # freestream angle of attack
# Geometry
'S_ref' : 1., # reference surface length
'c_ref' : 1., # reference chord length
'x_ref' : .25, # reference point for moment computation (x)
'y_ref' : 0.0, # reference point for moment computation (y)
'z_ref' : 0.0, # reference point for moment computation (z)
# Numerical
'LSolver' : 'GMRES', # inner solver (Pardiso, MUMPS or GMRES)
'G_fill' : 2, # fill-in factor for GMRES preconditioner
'G_tol' : 1e-5, # tolerance for GMRES
'G_restart' : 50, # restart for GMRES
'Rel_tol' : 1e-6, # relative tolerance on solver residual
'Abs_tol' : 1e-8, # absolute tolerance on solver residual
'Max_it' : 50 # solver maximum number of iterations
}
def cfgBlast(verb):
return {
'Re' : 6.5e6, # Freestream Reynolds number
'Minf' : 0.73, # Freestream Mach number (used for the computation of the time step only)
'CFL0' : 1, # Inital CFL number of the calculation
'Verb': verb, # Verbosity level of the solver
'couplIter': 50, # Maximum number of iterations
'couplTol' : 1e-4, # Tolerance of the VII methodology
'iterPrint': 5, # int, number of iterations between outputs
'resetInv' : True, # bool, flag to reset the inviscid calculation at every iteration.
'sections' : [0],
'xtrF' : [0., 0.],# Forced transition location
'interpolator' : 'Matching',
'nDim' : 2
}
def main():
# Timer.
tms = fwk.Timers()
tms['total'].start()
args = parseargs()
icfg = cfgInviscid(args.k, args.verb)
vcfg = cfgBlast(args.verb)
tms['pre'].start()
coupler, iSolverAPI, vSolver = viscUtils.initBlast(icfg, vcfg)
tms['pre'].stop()
print(ccolors.ANSI_BLUE + 'PySolving...' + ccolors.ANSI_RESET)
tms['solver'].start()
aeroCoeffs = coupler.run()
tms['solver'].stop()
# Display results.
print(ccolors.ANSI_BLUE + 'PyRes...' + ccolors.ANSI_RESET)
print(' Re M alpha Cl Cd Cdp Cdf Cm')
print('{0:6.1f}e6 {1:8.2f} {2:8.1f} {3:8.4f} {4:8.4f} {5:8.4f} {6:8.4f} {7:8.4f}'.format(vcfg['Re']/1e6, iSolverAPI.getMinf(), iSolverAPI.getAoA()*180/math.pi, iSolverAPI.getCl(), vSolver.Cdt, vSolver.Cdp, vSolver.Cdf, iSolverAPI.getCm()))
# Write results to file.
vSolution = viscUtils.getSolution(vSolver)
vSolution['Cdt_int'] = vSolution['Cdf'] + iSolverAPI.getCd()
tms['total'].stop()
print(ccolors.ANSI_BLUE + 'PyTiming...' + ccolors.ANSI_RESET)
print('CPU statistics')
print(tms)
print('SOLVERS statistics')
print(coupler.tms)
# Test solution
print(ccolors.ANSI_BLUE + 'PyTesting...' + ccolors.ANSI_RESET)
tests = CTests()
tests.add(CTest('Cl', iSolverAPI.getCl(), 0.752, 5e-2)) # XFOIL 0.2325
tests.add(CTest('Cd wake', vSolution['Cdt_w'], 0.0094, 1e-3, forceabs=True)) # XFOIL 0.00531
tests.add(CTest('Cd integral', vSolution['Cdt_int'], 0.0145, 1e-3, forceabs=True)) # XFOIL 0.00531
tests.add(CTest('Cdf', vSolution['Cdf'], 0.0069, 1e-3, forceabs=True)) # XFOIL 0.00084, Cdf = 0.00447
tests.add(CTest('Iterations', len(aeroCoeffs), 35, 0, forceabs=True))
tests.run()
# Show results
if not args.nogui:
iCp = viscUtils.read('Cp_inviscid.dat')
vCp = viscUtils.read('Cp_viscous.dat')
plotcp = {'curves': [np.column_stack((vCp[:,0], vCp[:,3])),
np.column_stack((iCp[:,0], iCp[:,3]))],
'labels': ['Blast (VII)', 'DART (inviscid)'],
'lw': [3, 3, 2, 2],
'color': ['darkblue', 'darkblue'],
'ls': ['-', '--'],
'reverse': True,
'xlim':[0, 1],
'yreverse': True,
'legend': True,
'xlabel': '$x/c$',
'ylabel': '$c_p$'
}
viscUtils.plot(plotcp)
plotcf = {'curves': [np.column_stack((vSolution['x'], vSolution['Cf']))],
'labels': ['Blast'],
'lw': [3, 3],
'color': ['darkblue'],
'ls': ['-'],
'reverse': True,
'xlim':[0, 1],
'legend': True,
'xlabel': '$x/c$',
'ylabel': '$c_f$'
}
viscUtils.plot(plotcf)
# eof
print('')
if __name__ == "__main__":
main()
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