The NASA Rotor 67 fan bladed disk is a subsystem of a turbofan’s compressor set used in aerospace engine applications.
The following sector model, representing a challenging industrial example for which the detailed geometry and flow information is available in the public domain, consists of a disk and a fan blade with a sector angle of 16.364 degrees:
The full model consists of 22 fan blades:
The sector model represents the running condition or hot geometry of the blade. It is already optimized at the running condition under loading. The primary objective is to obtain the cold geometry (for manufacturing) from the given hot geometry using inverse solving.
To verify the inverse-solving analysis results, a standard forward-solving analysis is performed on the cold geometry (obtained by inverse solving) to complete a loop test for results comparison.
To highlight Mechanical APDL inverse-solving technology, this example problem does not involve a cyclic symmetry analysis.