7.2.3. Profile Data Expansion with Mapping (Option = Mapped Expansion)

The Mapped Expansion option enables you to streamline your workflow by combining into one operation:

  • Profile mapping to mesh regions

  • Profile expansion

When you select this option, you are presented with all of the settings used by both the Expansion and Map to Mesh Regions options.

When the profile transformation is applied, the following operations take place:

  1. An initial profile expansion takes place, using the expansion-related settings, except that the Expand to Full Circle option is used.

    The initial expansion ensures that the original profile covers the whole of the regions of interest, even though the location of the periodic interfaces may differ between the original profile and the CFX mesh. It is assumed that the position of the profile already aligns with the CFX mesh (that is, the blades/hub/shroud are coincident); otherwise, other profile transformations must first be set up in order to align the profile correctly.

  2. The profile is mapped onto the selected mesh regions.

  3. A second expansion takes place, using your expansion settings. Note that it is assumed that the selected mesh regions are all from the same passage; this is important for ensuring that the Sector Tag variable (added in the Expansion process) correctly numbers the passages in the expanded profile — all of the selected mesh regions are given a Sector Tag variable set to 1.

For very large meshes or profiles, the initial full-wheel expansion in step 1 could be computationally expensive, since the mapping process needs to match the full-wheel profile with the selected mesh regions. If the initial full-wheel expansion is not necessary in order to ensure that the selected mesh regions are completely covered by the initial profile, you should consider setting up the three individual transformations separately.

Note:  Note: The mapping statistics displayed for a Mapped Expansion transformation refer to the profile immediately before the mapping operation (that is, after the initial profile expansion) and the profile immediately after the mapping operation (that is, before the second expansion). This means that the reported overlap percentages will normally be significantly less than 100%, and the variable ranges may be quite different before and after the mapping.