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 language | English |
|---|---|
| Title of host publication | Proceedings of the ASME Turbo Expo |
| Pages | 1395-1407 |
| Number of pages | 13 |
| Volume | 7 |
| Edition | PARTS A AND B |
| DOIs | |
| State | Published - Dec 1 2012 |
| Event | ASME Turbo Expo 2012: Turbine Technical Conference and Exposition, GT 2012 - Copenhagen, Denmark Duration: Jun 11 2012 → Jun 15 2012 |
Other
| Other | ASME Turbo Expo 2012: Turbine Technical Conference and Exposition, GT 2012 |
|---|---|
| Country | Denmark |
| City | Copenhagen |
| Period | 6/11/12 → 6/15/12 |
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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 proceeding › Conference contribution
}
TY - GEN
T1 - Simulation of non-synchronous blade vibration of an axial compressor using a fully coupled fluid/structure interaction
AU - Im, Hong Sik
AU - Zha, GeCheng
PY - 2012/12/1
Y1 - 2012/12/1
N2 - 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.
AB - 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.
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UR - http://www.scopus.com/inward/citedby.url?scp=84881190746&partnerID=8YFLogxK
U2 - 10.1115/GT2012-68150
DO - 10.1115/GT2012-68150
M3 - Conference contribution
SN - 9780791844731
VL - 7
SP - 1395
EP - 1407
BT - Proceedings of the ASME Turbo Expo
ER -