## 6.6. Fourier Transformation

Unlike Time Transformation, the Fourier Transformation method does not have any known limitations on the pitch ratio (or nodal diameter for a blade flutter application) and works with both, compressible and incompressible flows.

The Fourier transformation method can be used in cases involving:

- Rotational flow boundary disturbances

- Blade flutter (or forced response)

- Transient rotor stator interactions (single stage only)

Note: See Fourier Transformation in the CFX-Solver Theory Guide for more theoretical information about the Fourier Transformation method.

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