Instabilities Everywhere! Hard Problems in Aero-Engines
Name
turbo_145_2_021011.pdf
Description
Published version
Size
2.94 MB
Format
Adobe PDF
Checksum (MD5)
cff783ac1e7a692d273309b192341581
Author(s)
Spakovszky, Zoltán S
Date Issued
October 14, 2022
Journal
Journal of Turbomachinery
Publisher
ASME International
Citation
Spakovszky, Z. S. (October 14, 2022). "Instabilities Everywhere! Hard Problems in Aero-Engines." ASME. J. Turbomach. February 2023; 145(2): 021011.
Version
Final published version
Abstract
Many of the challenges that limited aero-engine operation in the 1950s, 1960s, 1970s, and 1980s were static in nature: hot components exceeding temperature margins, stresses in the high-speed rotating structure approaching safety limits, and turbomachinery aerodynamic efficiencies missing performance goals. Modeling tools have greatly improved since and have helped enhance jet engine design, largely due to better computers and improved simulations of the fluid flow and supporting structure. The situation is thus different today, where important problems encountered past the design and development phases are dynamic in nature. These can jeopardize engine certification and lead to major delays and increased program costs. A real challenge is the characterization of damping and the related dynamic behavior of rotating and stationary components and assemblies, and of the fluid–structure interactions and coupling. The theme of this lecture is instability in the broadest sense. A number of problems of technological interest in aero-engines are discussed with a focus on dynamical system modeling and identification of the underlying mechanisms. Future perspectives on outstanding seminal problems and grand challenges are also given.
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DOI of Published Version
https://doi.org/10.1115/1.4055424
