Simulation of non-synchronous blade vibration of an axial compressor using a fully coupled fluid/structure interaction

Hong Sik Im, GeCheng Zha

Research output: Chapter in Book/Report/Conference proceedingConference contribution

13 Citations (Scopus)

Abstract

In this paper non-synchronous vibration (NSV) of a GE axial compressor is simulated using a fully coupled fluid/strcuture interaction (FSI). Time accurate Navier- Stokes equations are solved with a system of 5 decoupled structure modal equations in a fully coupled manner. A 3rd order WENO scheme for the inviscid flux and a 2nd or- der central differencing for the viscous terms are used to resolve nonlinear interaction between vibrating blades and fluid flow. 1=7th annulus is used with a time shifted phase- lag (TSPL) boundary condition to reduce computational ef- forts. A fully conservative rotor/stator sliding boundary con- dition is employed to accurately capture unsteady wake prop- agation between the rotor and stator blades. The predicted dominant frequencies using the blade tip response signals are not harmonic to the engine order, which is the NSV. The blade vibration is torsionally coupled with highly oscillating blade pressure and is not damped out during the NSV. No resonance to the blade natural frequencies is found. The in- stability of tornado vortices in the vicinity of the rotor tip due to the strong interaction of incoming flow, tip vortex and tip leakage flow is the main cause of the NSV observed in this study.

Original languageEnglish
Title of host publicationProceedings of the ASME Turbo Expo
Pages1395-1407
Number of pages13
Volume7
EditionPARTS A AND B
DOIs
StatePublished - Dec 1 2012
EventASME Turbo Expo 2012: Turbine Technical Conference and Exposition, GT 2012 - Copenhagen, Denmark
Duration: Jun 11 2012Jun 15 2012

Other

OtherASME Turbo Expo 2012: Turbine Technical Conference and Exposition, GT 2012
CountryDenmark
CityCopenhagen
Period6/11/126/15/12

Fingerprint

Fluid structure interaction
Turbomachine blades
Compressors
Rotors
Stators
Vortex flow
Boundary conditions
Tornadoes
Phase boundaries
Navier Stokes equations
Flow of fluids
Natural frequencies
Fluxes
Engines
Fluids

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Simulation of non-synchronous blade vibration of an axial compressor using a fully coupled fluid/structure interaction. / Im, Hong Sik; Zha, GeCheng.

Proceedings of the ASME Turbo Expo. Vol. 7 PARTS A AND B. ed. 2012. p. 1395-1407.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Im, HS & Zha, G 2012, Simulation of non-synchronous blade vibration of an axial compressor using a fully coupled fluid/structure interaction. in Proceedings of the ASME Turbo Expo. PARTS A AND B edn, vol. 7, pp. 1395-1407, ASME Turbo Expo 2012: Turbine Technical Conference and Exposition, GT 2012, Copenhagen, Denmark, 6/11/12. https://doi.org/10.1115/GT2012-68150
Im, Hong Sik ; Zha, GeCheng. / Simulation of non-synchronous blade vibration of an axial compressor using a fully coupled fluid/structure interaction. Proceedings of the ASME Turbo Expo. Vol. 7 PARTS A AND B. ed. 2012. pp. 1395-1407
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