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nacelleGuideCurve Element

Guide curve

Namespace: Empty

Schema: Empty

Type
Parents
Children
NameOccurrencesDescription
All All
      Element description[0, 1]

Description

      Element fromZeta

Curve coordinate of the referenced section profile at which the guide curve shall start. Valid values are in the interval -1,..,1.

      Element guideCurveProfileUID

UID of the guide curve profile

      Element name

Name

      Element startSectionUID

UID of the start section

      Element toZeta

Curve coordinate of the profile following the referenced section profile. It defines where the guide curve ends. Valid values are in the interval -1,..,1.

Attributes
NameTypeRequiredDescription
Attribute externalDataDirectorySimple Type string
Attribute externalDataNodePathSimple Type string
Attribute externalFileNameSimple Type string
Remarks

The following figure shows the basic setup of the guide curves. They always start at a given ζ-position (fromZeta) on the profile of the specified start section (startSectionUID) and end at the ζ-position (toZeta) on the profile of the subsequent section. The relative coordinates of the guide curves are specified in cpacs/vehicles/profiles/guideCurves and referenced via its uID.

Guide curves

Note: Guide curves and profiles must result in a valid curve network.

The guide curve points are interpreted as (Δr and Δx) offsets from a cubic polynomial. This polynomial serves as a baseline for guide curves between segments located on different radial positions with smooth transitions:

Guide curve

Note: Currently, the nacelles do not have an explicit guide curve type but employ the standard guide curve definition, which is used in wings and profiles. Therefore, the parameters have a different meaning:

Standard guide curve parameterNacelle guide curve equivalentDescription
rXφ Independent variable normalized to [0,1]
rYΔx Orthogonal offset (translation in x-direction)
rZΔrRadial offset
See Also