Native format

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Native format

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This format (*.cft-geo) can be used to import rotational symmetric components only. It is a XML format including the following information:

General information (mandatory)

Length unit type

LengthMm for millimeters
LengthM for meters
LengthIn for inches

Unshrouded flag

Only required for vaned designs. 1 = unshrouded, 0 = shrouded

xTipInlet

Only required for vaned and unshrouded designs. Tip length at inlet.

xTipOutlet

Only required for vaned and unsrhouded designs. Tip length at outlet.

Meridional contour information (mandatory)

Hub contour

Array of curves. At least one curve is required. Each curve contains an array of 2D-points (r, z coordinates).
Stretches on rotation axis can be specified as part of the hub contour. It is required, for example, for designs without hub (stators with pipe form).

Shroud contour

Array of curves. At least one curve is required. Each curve contains an array of 2D-points (r, z coordinates).

Blades information (only required for vaned designs)

Mean lines and blade thickness data must be provided for both main and splitter blade. Only symmetric blades are supported.

Span positions

Relative position between hub and shroud (0...1). Array of at least 2 float numbers.

Mean line data

Array of at least 2 curves. Each curve contains an array of 3D-points (r, T, z coordinates).

Thickness data

Array of 2 curves. The first curve defines thickness data on hub, the second one on shroud. Each curve contains an array of points defined by two coordinates:

x = relative point position on mean line
y = blade thickness at this position

Thickness data are required at least for both relative positions, 0 (leading edge) and 1 (trailing edge). The thickness distribution along the mean line is interpolated using all values.

 

An example file can be easily generated by exporting any CFturbo component using the "CFturbo Exchange" export interface.