referenceValues Element

Reference values for VSAero computation

Namespace: Empty

Schema: Empty

Type
Parents
Children
NameOccurrencesDescription
All All
      Element area

Reference area

      Element lengthCMXCMZ

Reference length for rolling and yawing moment

      Element lengthCMY

Reference length for pitching moment

      Element momentReferencePoint

Reference point

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

0. General overview

Reference values used by VSAero for aerodynamic computations. If this node is created automatically by the tool's input mapping ( Framework integration mode), the selected aircraft model's common reference length is used for <lengthCMXCMZ> and <lengthCMY>. If this node is created manually (for Toolwrapper input mode), the CPACS-Outputfile uses <lengthCMY> as common reference length.

1. <area> (mandatory)

This is the reference area, used to calculate all the aerodynamic coefficients.

2. <lengthCMXCMZ> (mandatory)

This is the reference length, used to calculate all the rolling and yawing moment coefficients (C Mx and C Mz ).

3. <lengthCMY> (mandatory)

This is the reference length, used to calculate all the pitching moment coefficients (C My ).

4. <momentReferencePoint> (mandatory)

This is the reference point in (global coordinate system), used for all moment computations. It further is origin of the three axis' for quasi steady rotation calculations. VSAero itself always uses the origin of the global coordinate system as origin for the quasi steady rotations. Hence, for the VSAero computation, the whole aircraft model is moved in a way, so that the <momentReferencePoint> is located at the origin [0,0,0] of the global coordinate system. The results are transformed back into the CPACS coordinate system afterwards.

See Also