Centrifugally Loaded Particle Damping

Period of Performance: 09/28/1998 - 04/28/2000


Phase 2 STTR

Recipient Firm

CSA Engineering, Inc.
2565 Leghorn Street
Mountain View, CA 94043
Principal Investigator
Firm POC

Research Institution

University of Dayton
300 College Park
Dayton, OH 45469
Institution POC

Research Topics


CSA Engineering, with the University of Dayton Research Institute (UDRI) proposes to continue the development and validation of a design method for implementing particle damping in gas turbine engine blades. The feasibility of this proposed approach as been demonstrated in Phase I efforts. The overall program objective is to develop a robust design method to apply particle damping for mitigation of high-cyle fatigue failures of engine blades. The objectives of this Phase II effort are to show 1) that a design method can be developed to predict blade damping effectiveness, and 2) that realistic particle damper configurations will function in high centrifugal load environments. To accomplish these objectives a particle damper parameter characterization test capability based on a small scale centrifuge will be developed to investigate the influence of compaction on particles. Such measurements will be used to help refine the analytical procedure developed to predict damping effectiveness. Finally, a blade-like structure will be acquired and the design methods developed in this effort will be used to implement a particle damping solution to be tested in a spin pit. To ensure relevance to the engine community, our team has support from Pratt & Whitney.