Robust design of turbine blades against manufacturing variability

Thakur, Nikita, Keane, A.J. and Nair, P.B. (2011) Robust design of turbine blades against manufacturing variability. International Journal of Reliability and Safety, 5, (3/4), 420-436. (doi:10.1504/IJRS.2011.041188).


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Turbine blade life is central to the integrity of the aircraft engine. Manufacturing variability may lead to variations in the expected life and performance of turbine blades. It becomes important therefore to understand these variations and seek new designs that are robust to manufacturing variability. The present work proposes a methodology that employs Free Form Deformation in conjunction with optimisation to generate realistic 3D representations of the manufactured blades using limited measurements available per blade. Lifing estimations on the perturbed geometries show a reduction of around 1.7% in mean life relative to the designed life with a maximum relative reduction of around 3.7%. Following this, the proposed methodology is employed for robust design studies resulting in a better turbine blade design. This design indicates an improvement of around 2% in the designed life, around 3% improvement in mean life and approximately 57% reduction in blade life variability as compared to the current turbine blade design

Item Type: Article
Digital Object Identifier (DOI): doi:10.1504/IJRS.2011.041188
ISSNs: 1479-389X (print)
1479-3903 (electronic)
Subjects: T Technology > TL Motor vehicles. Aeronautics. Astronautics
Divisions : Faculty of Engineering and the Environment > Aeronautics, Astronautics and Computational Engineering > Computational Engineering & Design
ePrint ID: 204257
Accepted Date and Publication Date:
1 June 2011Published
Date Deposited: 25 Nov 2011 14:32
Last Modified: 31 Mar 2016 13:47

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