Completed Projects

Turbo machinery blade rows are designed to contain identical blades within a given blade row.  However, minor differences in blade shape, structural properties, material properties, and flow field are inherently present among the blades in all bladed disks – collectively, these minor variations are known as “mistuning.”  Mistuning coupled with flexibility of the disk can localize the vibration energy of the system to a small sector of the disk containing only a few blades.  These blades could experience vibratory stresses several times higher than other blades not influenced by mistuning.  Current design methods assume a rotor to be tuned (all blades identical) and do not quantitatively account for the effects of mistuning on the fatigue life of the rotor, leading to higher rates of blade failure in the field than calculated during the design process. N&R is addressing this issue by using advanced mathematical methods to analytically determine the impact of mistuning during the design process.

Contacts

N&R Engineering:  

  Dr. Vinod Nagpal  

440-845-7020

 Client (Honeywell):  TBD