Efficient CSM/CFD method for aeroelasticity stability analys of turbomachne blades

Y. M. Temis, L. Salles

Research output: Contribution to conferencePaperpeer-review

2 Citations (Scopus)

Abstract

The problem of blade flutter prediction is relevant on the engine design stage. Modern technology of multidisciplinary simulation that combines the vibrating blade model and the response model of gas flow in gas dynamic tract is used in present paper to determine the influence of flow parameters on natural modes and frequencies. Geometrically nonlinear aeroelastic blade models (pre-twisted beam, shell and 3D solid body) that consider aerodynamic stiffness in the blade assembly are implemented. Aerodynamic stiffness coefficients are calculated on the base of CFD simulation results. Stability analysis for typical compressor and turbine blades is carried out. It is demonstrated, that centrifugal loads and flow speed change blade natural frequencies and modes, what has an influence on blade sensitivity to flutter. It is shown that connection between blade second bending and first torsion natural modes defines the condition of blade bending-torsion flutter initiation.

Original languageEnglish
Publication statusPublished - 2012
Externally publishedYes
Event14th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, ISROMAC 2012 - Honolulu, HI, United States
Duration: 27 Feb 20122 Mar 2012

Conference

Conference14th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, ISROMAC 2012
Country/TerritoryUnited States
CityHonolulu, HI
Period27/02/122/03/12

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