Modeling of Integrally Bladed Rotor (IBR) Blends

Award Information
Agency: Department of Defense
Branch: Navy
Contract: N68335-13-C-0372
Agency Tracking Number: N13A-002-0312
Amount: $79,722.00
Phase: Phase I
Program: STTR
Awards Year: 2013
Solicitation Year: 2013
Solicitation Topic Code: N13A-T002
Solicitation Number: 2013.A
Small Business Information
10 Halfmoon Executive Park Drive, Clifton Park, NY, -
DUNS: 012076795
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Ottmar Klaas
 Senior Software Engineer
 (518) 348-1639
 oklaas@simmetrix.com
Business Contact
 Mark Beall
Title: President
Phone: (518) 348-1639
Email: mbeall@simmetrix.com
Research Institution
 Duke University
 Keith Hurka-Owen
 220 W. Main St, Ste. 710
Durham, NC, 22705-
 (919) 684-3030
 Nonprofit college or university
Abstract
Integrally bladed rotors (IBR), also called blisks, are becoming increasingly common in the compressor and fan sections of modern turbine engines. The integration of the blades and disks into a single part has the advantages of reduced part count, reduced weight, increased reliability, and increased performance. However, a drawback of this technology is that individual blades cannot be easily replaced and thus blending is typically used to resolve minor damage to blades. Blending involves removing material around the damaged area to reduce the stress concentrations that could lead to cracking and subsequent failure. But this process also changes the mechanical, dynamic, and aerodynamic properties of the blisk. This project will combine the expertise of Simmetrix, Duke University and GE to create a system to model the effects of introducing blends into a blisk, giving the ability to accurately predict the structural and aerodynamic effects of such a repair. By being able to model these effects, the blend shape and size can be optimized minimizing the impacts on the performance and reliability of the engine.

* Information listed above is at the time of submission. *

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