Due to rotational symmetry, only one blade passage must be meshed, reducing
computing cost and time. Instance transforms are used to
replicate sections of the computational domain in the viewer for viewing purposes.
For example, you may use a rotational transform to copy a blade passage to produce a
plot of an entire rotor or stator, or a fraction thereof. However, for most
purposes, it is sufficient to make use of the special toolbar icons dedicated to
viewing 1, 2, or all instances (
, 
, and 
respectively). Instance transforms are more
flexible than these special toolbar icons in that they can be applied to single
objects rather than to only all (qualified) objects at the same time.
To create an instance transform, select Insert > User Defined > Instance Transform from the main menu.
Note: In this release of Ansys TurboGrid, instancing is purely visual. This means that quantitative calculations can be carried out only for the original geometry.
The # of Copies is the number of times the domain is
replicated in the viewer. Type in the value, increase or decrease the value
by 1 by clicking 
or 
respectively.
To see the whole rotating machine, the number of copies must equal the
number of blade sets, as defined in the Machine Data
object.
If you edit an instance transform in the Command Editor dialog box, changes to settings, other than Number of Copies, will be lost the next time the Apply button is clicked in the instance transform editor. This happens because the instance transform editor overwrites all of the ccl parameters, except # of Copies, with the values stored in the default instance transform object.