Length tolerance (meter)

The distance below which two points are considered to be coincident.

Separate leading and trailing edge surfaces

Select Separate leading and trailing edge surfaces to represent each of the leading edge, pressure surface, trailing edge, and suction surface, with the corresponding surface defined in the loaded NDF file. Otherwise, the leading edge, pressure surface, trailing edge, and suction surface, will together be represented by a single unbroken surface. A single unbroken surface provides superior continuity of curvature. However, when geometry involving such a single unbroken surface is exported for, and then loaded into, TurboGrid, the resulting geometry might be problematic; any such problems are expected to be very noticeable.

Blade extension factor

This setting defines the surface extension length, as a fraction of the average hub-to-shroud distance, for the blade surfaces. The surfaces must be extended to ensure that they can reach the hub and shroud contours, where they are trimmed.

Background mesh size

The interpolation mesh is used to establish spanwise and streamwise coordinates in the flow path. It is important that the interpolation mesh sufficiently resolves the flow path in order to avoid adversely affecting geometry creation.

The default interpolation mesh size is 2000. If the flow path is long and contains sharp bends (low-radius bends as viewed in the meridional plane), you should specify a higher interpolation mesh size. As a guideline, the mesh size should be 2000 multiplied by the number of blade rows.

Solid bodies

Select Solid bodies if you want to include solid bodies for blades in the geometry, for example to be used in a structural analysis.

TurboGrid geometry

Select TurboGrid geometry if you want to include the blade passage, blade surfaces, and other data needed by TurboGrid, in the geometry. Select this option if you want to export geometry to TurboGrid (which is for creating a CFD mesh).

Select High fidelity geometry to include high fidelity geometry, for example to model a complex blade end such as a partial tip.

Select Disable high fidelity for tip gaps and/or Disable high fidelity for plain ends to disable creating parts of the high fidelity geometry, for example to temporarily save computational resources if high fidelity geometric details are not required. Here, a "plain end" is where the blade meets the hub or shroud with neither a fillet nor a tip gap.

Enable subdivision surface body workflow

Select Enable subdivision surface body workflow if you want to include subdivision surface bodies in the geometry.