ntrfc.turbo package

Subpackages

• ntrfc.turbo.airfoil_generators package
  • Submodules
  • ntrfc.turbo.airfoil_generators.naca_airfoil_creator module
    • interpolate()
    • linspace()
    • naca()
    • naca4()
    • naca5()
  • ntrfc.turbo.airfoil_generators.parsec_airfoil_creator module
    • parsec_airfoil_gen()
    • pcoef()
  • Module contents

Submodules

ntrfc.turbo.bladeloading module

ntrfc.turbo.bladeloading.calc_cf(tau_w, u_inf, rho_inf)

Calculates skin friction coefficient

Parameters:

• tau_w (float) – wall shear stress

• u_inf (float) – freestream velocity

• rho_inf (float) – freestream density

Returns:

skin friction coefficient

Return type:

float

ntrfc.turbo.bladeloading.calc_inflow_cp(px, pt1, p1)

Parameters:

• px – pressure at position

• pt1 – total pressure inlet

• p1 – pressure inlet

Returns:

lift coefficient

ntrfc.turbo.bladeloading.calc_zeta(pt1, pt2x, p2)

Calculates the Total Pressure Loss Coefficient (Zeta) for a fluid system.

Parameters:

pt1 : float : Upstream total pressure [Pa] pt2x : float : Downstream total pressure [Pa] p2 : float : Downstream static pressure [Pa]

Returns:

zeta : float : Total Pressure Loss Coefficient (Zeta) [dimensionless]

ntrfc.turbo.cascade_geometry module

ntrfc.turbo.cascade_geometry.calcmidpassagestreamline(x_mcl, y_mcl, beta1, beta2, x_inlet, x_outlet, t)

Returns mid-passage line from sceletal-line Returns two lists of Points representing a curve through the passage Input: x_mcl = Tuple y_mcl = Tuple beta1, beta2 = Angle in deg - Beta = Anströmwinkel x_inlet, x_outlet = scalar - representing position x-component of in/outlet t = scalar pitch

ntrfc.turbo.domaingen_cascade module

ntrfc.turbo.domaingen_cascade.cascade_2d_domain(profilepoints2d, x_inlet, x_outlet, pitch, unit, blade_shift, alpha, path=False)

profilepoints2d = 2d numpy array

ntrfc.turbo.domaingen_cascade.cascade_3d_domain(sortedPoly, psPoly, ssPoly, per_y_upper, per_y_lower, inletPoly, outletPoly, zspan, avdr=1, path=None)

ntrfc.turbo.integrals module

ntrfc.turbo.integrals.avdr(rho_1, mag_u_1, beta_1, rho_2, mag_u_2, beta_2)

Parameters:

• rho_1 – float

• mag_u_1 – float

• beta_1 – float

• rho_2 – float

• mag_u_2 – float

• beta_2 – float

Returns:

float

ntrfc.turbo.pointcloud_methods module

ntrfc.turbo.pointcloud_methods.calcMidPassageStreamLine(x_mcl, y_mcl, beta1, beta2, x_inlet, x_outlet, t, verbose=False)

Calculate the midpoint stream line curve through a passage.

Parameters:

x_mclarray_like

The x-coordinates of the mid-chord line.

y_mclarray_like

The y-coordinates of the mid-chord line.

beta1float

The angle in degrees representing the inflow angle at the inlet.

beta2float

The angle in degrees representing the outflow angle at the outlet.

x_inletfloat

The x-coordinate of the inlet position.

x_outletfloat

The x-coordinate of the outlet position.

tfloat

The pitch of the midpoint stream line.

verbosebool, optional

If True, a plot of the midpoint stream line is displayed.

Returns:

x_mpsl_refarray_like

The refined x-coordinates of the midpoint stream line.

y_mpsl_refarray_like

The refined y-coordinates of the midpoint stream line.

ntrfc.turbo.pointcloud_methods.extractSidePolys(ind_1, ind_2, sortedPoly, verbose=False)

ntrfc.turbo.pointcloud_methods.extract_geo_paras(polyblade, alpha=None, verbose=False)

This function is extracting profile-data as stagger-angle, midline, psPoly, ssPoly and more from a set of points Be careful, you need a suitable alpha-parameter in order to get the right geometry The calculation of the leading-edge and trailing-edge index needs time and its not 100% reliable (yet) Keep in mind, to check the results! :param polyblade: pyvista polymesh of the blade :param alpha: nondimensional alpha-coefficient (calcConcaveHull) :param verbose: bool for plots :return: points, psPoly, ssPoly, ind_vk_, ind_vk, midsPoly, beta_leading, beta_trailing, alpha

ntrfc.turbo.pointcloud_methods.extract_points_fromsortedpoly(sorted_indices, sorted_poly)

Extract a subset of points and associated data from a sorted polygon.

Parameters:

• sorted_indices (numpy.ndarray) – 1D array of shape (n_points,) containing the indices of the points in sorted_poly.points that should be extracted and used to create a new polygon. The indices should be sorted in the order that they should appear in the new polygon.

• sorted_poly (pyvista.PolyData) – Polygon represented as a PolyData object from the pyvista library. The sorted_poly.points attribute should be a NumPy array of shape (n_points, 3) containing the 3D coordinates of the polygon vertices, and the sorted_poly.point_data attribute should be a dictionary of NumPy arrays containing additional per-vertex data.

Returns:

A new PolyData object representing the subset of the original polygon specified by sorted_indices, with all per-vertex data preserved.

Return type:

pyvista.PolyData

Notes

This function assumes that the input polygon is sorted in a specific way. Specifically, the sorted_indices parameter should contain the indices of the points in the order that they should appear in the new polygon. If the input polygon is not sorted in this way, the resulting polygon may not be valid.

ntrfc.turbo.pointcloud_methods.mid_length(ind_1, ind_2, sorted_poly)

calc length of a midline. currently only used in the iterative computation of LE and TE index of a profile. probably this method is not necessary, as it is only two lines :param ind_1: index LE :param ind_2: index TE :param sorted_poly: pv.PolyData sorted :return: length

ntrfc.turbo.pointcloud_methods.midline_from_sides(ps_poly, ss_poly)

ntrfc.turbo.probegeneration module

ntrfc.turbo.probegeneration.create_midpassageprobes(midspan_z, x_inlet, x_outlet, pitch, beta1, beta2, midspoly, nop_streamline)

ntrfc.turbo.probegeneration.create_profileprobes(ssPoly, psPoly, midspan_z, pden_ps, pden_ss, tolerance=1e-10)

Create profile probes from two PolyData objects.

Parameters: - ssPoly: PyVista PolyData object representing the suction side profile. - psPoly: PyVista PolyData object representing the pressure side profile. - midspan_z: Height of the midspan plane along the z-axis. - pden_ps: Density of the pressure side profile points. - pden_ss: Density of the suction side profile points. - tolerance: Small tolerance value to shift the 3D faces along their normals.

Returns: - probes_ss: PyVista PolyData object representing the profile probes on the suction side. - probes_ps: PyVista PolyData object representing the profile probes on the pressure side.

ntrfc.turbo.probegeneration.create_stagnationpointprobes(length, nop, sortedpoly, ind_vk, u_inlet, midspan_z)

ntrfc.turbo.profile_tele_extraction module

ntrfc.turbo.profile_tele_extraction.extract_vk_hk(sortedPoly, verbose=False)

ntrfc.turbo.profile_tele_extraction.get_centroids(triangles)

Module contents