NDLI: Analysis on Flutter Characteristics of Transonic Compressor Blade Row by a Fluid-Structure Coupled Method

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Zhang, Mingming Hou, Anping Zhou, Sheng Yang, Xiaodong
Copyright Year	2012
Abstract	A time domain numerical approach is carried out to enhance the understanding of three dimensional blade row aeroelastic characteristics under the parallel computation. The vibration energy of unsteady aerodynamic force on the entire blade row is investigated using numerical solution of 3-D Navier-Stokes equations, coupled with structure finite element models for the blades to identify modal shapes and the structural deformations simultaneously. Interactions between fluid and structure are dealt with in a coupled manner, based on the interface information exchange until convergence in each time step. With this approach good agreement between the numerical results and the experimental data is observed. The flutter mechanism is analyzed according to deformation of the blades. The effect of inter-blade phase angle (IBPA) is included in the analysis by releasing the hypothesis of constant phase angle between adjacent blades in the traveling wave model. The results illustrate fully three dimensional unsteady nonlinear behaviors, such as limit-cycle oscillation. It is shown that all blades flutter at the same mode and frequency, but not at the same amplitude and IBPA. The analysis of the influence of different tip clearance gaps on the flutter characteristics of the blade row is also performed.
Sponsorship	International Gas Turbine Institute
Starting Page	1519
Ending Page	1528
Page Count	10
File Format	PDF
ISBN	9780791844731
DOI	10.1115/GT2012-69439
Volume Number	Volume 7: Structures and Dynamics, Parts A and B
Conference Proceedings	ASME Turbo Expo 2012: Turbine Technical Conference and Exposition
Language	English
Publisher Date	2012-06-11
Publisher Place	Copenhagen, Denmark
Access Restriction	Subscribed
Subject Keyword	Deformation Navier-stokes equations Vibration Blades Clearances (engineering) Oscillations Aerodynamics Traveling waves Compressors Fluid-dynamic forces Limit cycles Fluids Finite element model Computation Flutter (aerodynamics) Shapes
Content Type	Text
Resource Type	Article

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