Aeroelastic control of stability and forced response of supersonic rotors by aerodynamic detuningAerodynamic detuning, defined as designed passage-to-passage differences in the unsteady aerodynamic flow field of a rotor blade row, is a new approach to passive flutter and forced response control. In this paper, a mathematical model for aerodynamic detuning is developed and utilized to demonstrate the aeroelastic stability enhancement due to aerodynamic detuning of supersonic blade rows. In particular, a model is developed to analyze both the torsion mode and the coupled bending-torsion mode unstalled supersonic flutter and torsion mode aerodynamically forced response characteristics of an aerodynamically detuned rotor operating in a supersonic inlet flow field with a subsonic leading edge locus. As small solidity variations do not have a dominant effect on the steady-state performance of a rotor, the aerodynamic detuning mechanism considered is nonuniform circumferential spacing of adjacent blades.
Document ID
19870058975
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Hoyniak, Daniel (NASA Lewis Research Center Cleveland, OH, United States)
Fleeter, Sanford (Purdue University West Lafayette, IN, United States)