Transferring CFD pressure to the FE model

The complex pressure amplitudes of the Fourier mode corresponding to the vane passing frequency are interpolated and extrapolated from the three profile sections onto a fine transfer mesh, covering the entire blade surface (Fig. 7). In a second step, the complex pressure results are transferred from the fine intermediate mesh to the much coarser surface mesh of the FE model.

Each FE surface element face is assigned the pressure of a single point on the transfer mesh. This point is found using a growing tolerance sphere around the center of the FE-element, truncated by two restricting planes parallel to the finite element surface (Fig. 8). This method automatically detects the correct blade surface.

Interpolated complex static pressure (transfer mesh)

Rotor profile

Stator profiles

Interpolation of the Q3D complex blade pressure (real part shown) to the blade