buffalo_wings.airfoil.Naca45DigitThicknessClassic

class buffalo_wings.airfoil.Naca45DigitThicknessClassic(mti)[source]

Bases: Thickness

Class for the classic NACA 4-digit and 5-digit airfoil thickness.

The thickness is parameterized on the square root of the chord location where the thickness is desired. This is to remove singularities that occur at the leading edge for the typical chord length parameterization.

Notes

To obtain a classic thickness profile the maximum thickness should be set to an integer value, i.e. 12. However, any floating point value can be passed in, i.e. 12.3, if a more accurate maximum thickness is needed to be specified.

Parameters:: mti (float)

__init__(mti)[source]

Initialize a classic NACA thickness distribution.

Parameters:: mti (float) – Maximum-thickness index as a percent of chord.
Raises:: ValueError – If mti is outside the supported classic NACA range.
Return type:: None

Methods

`__init__`(mti)	Initialize a classic NACA thickness distribution.
`delta`(t)	Return the thickness at specified parameter location.
`delta_t`(t)	Return first derivative of thickness at specified parameter location.
`delta_tt`(t)	Return second derivative of thickness at specified parameter location.
`discontinuities`()	Return the locations of any discontinuities in the thickness.
`max_thickness_parameter`()	Return parameter coordinate of maximum thickness.

Attributes

`a`	Return the polynomial coefficients.
`max_thickness_index`	Return the maximum-thickness index.

property max_thickness_index: float

Return the maximum-thickness index.

Returns:: Maximum thickness as a percent-chord index.
Return type:: float

property a: ndarray[tuple[int, ...], dtype[float64]]

Return the polynomial coefficients.

Returns:: Coefficients for the classic thickness relation.
Return type:: buffalo_wings.type_aliases.FloatArray

discontinuities()[source]

Return the locations of any discontinuities in the thickness.

Returns:: Parametric coordinates of any discontinuities.
Return type:: List[float]

max_thickness_parameter()[source]

Return parameter coordinate of maximum thickness.

Returns:: Parameter coordinate of maximum thickness.
Return type:: float

delta(t)[source]

Return the thickness at specified parameter location.

Parameters:: t (numpy.ndarray) – Parameter location of interest. Equal to the square root of the desired chord location.
Returns:: Thickness at specified parameter.
Return type:: numpy.ndarray

delta_t(t)[source]

Return first derivative of thickness at specified parameter location.

Parameters:: t (numpy.ndarray) – Parameter location of interest. Equal to the square root of the desired chord location.
Returns:: First derivative of thickness at specified parameter.
Return type:: numpy.ndarray

delta_tt(t)[source]

Return second derivative of thickness at specified parameter location.

Parameters:: t (numpy.ndarray) – Parameter location of interest. Equal to the square root of the desired chord location.
Returns:: Second derivative of thickness at specified parameter.
Return type:: numpy.ndarray