Design and Characterization of the OSU Rotor 67 Blisk for Future Damping and Mistuning Studies at Design Speed

To facilitate experimentation in the field of gas turbine disk dynamics, a new integrally bladed disk, or blisk, was designed and manufactured for use at The Ohio State University (OSU) Gas Turbine Laboratory. The blisk was designed using methods following the Federal Aviation Administration Code of Federal Regulations for safety analysis. Both the airfoils and the hub of the OSU blisk are realistic to accurately represent hardware in jet engines, while being publicly available for analysis to provide a design and data sets that can be published without the need to normalize and protect proprietary information. After the blisk was manufactured, it was inspected and dynamically tested using a roving modal hammer. The natural frequencies and mistuning of each airfoil were calculated, and the finite element model was updated with this information. Knowledge of the natural frequencies and mistuning are important for the design of ring dampers that will be used to dampen vibration of the blisk during rotating testing.