def min_func(x):
global count
count += 1
print("\niteration: " + str(count))
_glider2d = deepcopy(glider2d)
glider_set_controlpoint(_glider2d, x)
glider3d = _glider2d.get_glider_3d()
panels = paraBEM_Panels(glider3d,
midribs=0,
profile_numpoints=40,
symmetric=True,
distribution=Distribution.from_nose_cos_distribution(40, 0.2),
num_average=0)
case = Case(panels[1], panels[2])
case.farfield = 5
case.drag_calc = "trefftz"
case.A_ref = 23
case.create_wake(length=10000, count=5)
case.v_inf = paraBEM.Vector3(8, 0, 1)
case.trefftz_cut_pos = case.v_inf * 50
alpha = v_inf_deg_range3(case.v_inf, 5, 9, 20)
polars = case.polars(alpha)
vtk_writer = CaseToVTK(case, "results/vtk_opt", suffix=str(count))
vtk_writer.write_panels(data_type="point")
cL = []
cD = []
for i in polars.values:
cL.append(i.cL)
cD.append(i.cD)
return np.interp(0.6, cL, cD)
from paraBEM.mesh import mesh_object
from paraBEM.pan3d import DirichletDoublet0Source0Case3 as Case
from paraBEM.vtk_export import CaseToVTK
mesh = mesh_object.from_OBJ("../mesh/sphere_half.obj")
for panel in mesh.panels:
panel.set_symmetric()
case = Case(mesh.panels)
case.run()
writer = CaseToVTK(case, "results/symmetric_test")
writer.write_panels(data_type="point")
writer.write_field([-2, 2, 20], [-2, 2, 20], [-2, 2, 20])
v_inf = [8, 0, 1]
case = Case(panels, trailing_edge)
case.mom_ref_point = paraBEM.Vector3(1.25, 0, -6)
case.A_ref = parametricGlider.shape.area
case.farfield = 5
case.drag_calc = "on_body"
case.trefftz_cut_pos = case.v_inf * 800
case.v_inf = paraBEM.Vector3(v_inf)
case.create_wake(length=10000, count=4) # length, count
polars = case.polars(v_inf_deg_range3(case.v_inf, -5, 12, 15))
vtk_writer = CaseToVTK(case, "results/vtk_glider_case")
vtk_writer.write_panels(data_type="cell")
vtk_writer.write_wake_panels()
vtk_writer.write_body_stream(panels, 100)
p = []
alpha = []
for i in polars.values:
alpha.append(np.rad2deg(i.alpha))
p.append((i.cL, i.cD, i.cP, i.cop.x, i.cop.z))
plt.figure(figsize=(10, 4))
# plt.title(u"Beiwerte bei variiertem Anströmwinkel")
plt.ylabel(u"$\\alpha$", rotation=0, fontsize=20)
plt.xlabel(u"$c_{Wi}$, $c_N$, $c_A$", rotation=0, fontsize=20)
plt.plot(np.array(p).T[0], alpha, label=u"$c_A$")
from paraBEM.vtk_export import CaseToVTK
with open("../openglider/glider/referenz_schirm_berg.json") as _file:
glider = load(_file)["data"]
panels = paraBEM_Panels(glider.get_glider_3d() , 0, 30, 0, False)
case = Case(panels[1], panels[2])
case.v_inf = paraBEM.Vector(glider.v_inf)
case.drag_calc = "on_body"
case.A_ref = glider.shape.area
#wake parallel to the x axis
print("* wake parallel to the x-axis")
case.create_wake(50, 100, paraBEM.Vector3(1., 0., 0.))
case.run()
writer = CaseToVTK(case, "results/wake/x-parallel")
writer.write_panels()
writer.write_wake_panels()
print("F_l = ", case.cL * case.A_ref * 1.2 * 11**2 / 2.,
"F_w = ", case.cD * case.A_ref * 1.2 * 11**2 / 2.)
#wake parallel to v_inf
print("* wake parallel to v_inf")
case.create_wake(50, 100, case.v_inf)
case.run()
writer = CaseToVTK(case, "results/wake/v_inf-parallel")
writer.write_panels()
writer.write_wake_panels()
print("F_l = ", case.cL * case.A_ref * 1.2 * 11**2 / 2.,
"F_w = ", case.cD * case.A_ref * 1.2 * 11**2 / 2.)
import paraBEM
from paraBEM import pan3d
from paraBEM.vtk_export import CaseToVTK
from paraBEM.mesh import mesh_object
import numpy as np
mesh = mesh_object.from_OBJ("../mesh/sphere_low_tri.obj")
case = pan3d.DirichletDoublet0Case3(mesh.panels)
case.v_inf = paraBEM.Vector3(1, 0, 0.)
case.farfield = 100
case.run()
lin = np.linspace(-0.5, 0.5, 5)
grid = [[-2, k, j] for j in lin for k in lin]
vtk_writer = CaseToVTK(case, "results/vtk_test_case")
vtk_writer.write_panels(data_type="point")
# vtk_writer.write_wake_panels()
vtk_writer.write_body_stream(mesh.panels, 50)
vtk_writer.write_field([-2, 2, 100], [-2, 2, 100], [-1, 1, 3])
n_x = 50
n_y = 10
a = Airfoil.joukowsky(-0.01+1j)
a.numpoints = n_x
print(a.coordinates)
ribs = [rib3d(a, y) for y in np.linspace(-5, 5, n_y)]
panels = []
for i in range(n_y)[:-1]:
for j in range(n_x):
panels.append(paraBEM.Panel3([ribs[i][j], ribs[i + 1][j], ribs[i + 1][j + 1], ribs[i][j + 1]]))
te = [rib[0] for rib in ribs]
print(te)
case = Case(panels, te)
case.farfield = 5
case.v_inf = paraBEM.Vector3(1, 0, 0.0)
case.create_wake(length=10000, count=3) # length, count
case.run()
for i in range(n_y):
plt.plot(*zip(*[[pan.center.x, pan.cp] for pan in case.panels[i * n_x : (i+1) * n_x]]),
marker="x")
# plt.show()
plt.plot(*zip(*a.coordinates))
# plt.show()
vtk_writer = CaseToVTK(case, "results/joukowsky3_d")
vtk_writer.write_panels(data_type="point")