Reduced-Order Aerodynamic Models for Mistuned Compressor Blades

Mistuning, or blade-to-blade variation, is an important consideration for aeroelastic analysis of bladed disks. The effects of mistuning on blade structural dynamics have been extensively studied and are well understood; however, to date, aerodynamic effects have not been included in such analyses.

In this research, a coupled aerodynamic/structural mistuning framework is formulated. Reduced-order aerodynamic models are derived and coupled with an existing structural mistuning framework. The computational framework will be used to gain insight to the effects of aerodynamic damping on aeroelastic behavior of mistuned bladed disks and to quantify the impact on aerodynamic performance of intentional mistuning.

This project is supported by the Air Force Research Laboratory, and includes collaboration with Dr. James Kenyon of the Air Force Research Laboratory and Dr. Drew Feiner and Prof. Jerry Griffin of Carnegie Mellon University .

Publications
Willcox , K. and Peraire , J., “Application of Reduced-Order Aerodynamic Modeling to the Analysis of Structural Uncertainty in Bladed Disks,” ASME Paper GT-30680, presented at the ASME International Gas Turbine and Aeroengine Technical Conference, Amsterdam ,June 2002