A Coupled Fluid–structure Analysis for 3-D Inviscid Flutter of Iv Standard Configuration

Gnesin, V.; Rządkowski, Romuald

doi:10.1006/jsvi.2001.3981

Cited by 19 publications

(8 citation statements)

References 7 publications

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“…The two-way coupled method is implemented via a modal superposition framework similar to Gnesin and Rzadkowski, 10 …”

Section: A Description and Implementationmentioning

confidence: 99%

Assessing Fan Flutter Stability in Presence of Inlet Distortion Using One-way and Two-way Coupled Methods

Herrick

2014

50th AIAA/ASME/SAE/ASEE Joint Propulsion Conference

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Concerns regarding noise, propulsive efficiency, and fuel burn are inspiring aircraft designs wherein the propulsive turbomachines are partially (or fully) embedded within the airframe; such designs present serious concerns with regard to aerodynamic and aeromechanic performance of the compression system in response to inlet distortion. Previously, a preliminary design of a forward-swept high-speed fan exhibited flutter concerns in cleaninlet flows, and the present author then studied this fan further in the presence of off-design distorted in-flows. Continuing this research, a three-dimensional, unsteady, Navier-Stokes computational fluid dynamics code is again applied to analyze and corroborate fan performance with clean inlet flow and now with a simplified, sinusoidal distortion of total pressure at the aerodynamic interface plane. This code, already validated in its application to assess aerodynamic damping of vibrating blades at various flow conditions using a one-way coupled energy-exchange approach, is modified to include a two-way coupled time-marching aeroelastic simulation capability. The two coupling methods are compared in their evaluation of flutter stability in the presence of distorted in-flows.

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“…The two-way coupled method is implemented via a modal superposition framework similar to Gnesin and Rzadkowski, 10 …”

Section: A Description and Implementationmentioning

confidence: 99%

Assessing Fan Flutter Stability in Presence of Inlet Distortion Using One-way and Two-way Coupled Methods

Herrick

2014

50th AIAA/ASME/SAE/ASEE Joint Propulsion Conference

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“…The first (direct) method is based on the direct time-domain numerical simulation of a coupled blade-flow system. This method not only provides flutter regimes but also gives limit cycle amplitude if flutter occurs [7]. However, numerical difficulties of this approach and the necessity of a great amount of computational resources and time are the main limitations of the wide applications of this method.…”

Section: Introductionmentioning

confidence: 98%

Experimental Validation of Numerical Blade Flutter Prediction

Vedeneev

Kolotnikov

Макаров³

2015

Journal of Propulsion and Power

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Blade flutter of modern gas-turbine engines is one of the main issues that engine designers have to face. The most used numerical method that is employed for flutter prediction is the energy method. Although a lot of papers are devoted to the analysis of different blade wheels, this method was rarely validated by experiments. Typical mesh size, time step, and various modeling approaches that guarantee reliable flutter prediction are not commonly known, whereas some examples show that predictions obtained through nonvalidated codes can be inaccurate. In this paper, we describe our implementation of the energy method. Analysis of convergence and sensitivity to various modeling abstractions are carefully investigated. Numerical results are verified by compressor and full engine flutter test data. It is shown that the prediction of flutter onset is rather reliable so that the modeling approaches presented in this paper can be used by other researchers for the flutter analysis of industrial compressor blades. Nomenclature f = natural frequency m = number of nodal diameters N = number of blades n = rotor speed W = work done by the unsteady pressure over one cycle of blade oscillation α = inlet angle of attack φ = 2π m∕N, interblade phase shift ω = 2πf, circular frequency

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“…In the research area of fluid machinery, some numerical research was conducted with a coupled method, but only a few studies considered the vibration problems of pump machinery in which water was the operational medium, such as the works by Benra (2006), Benra et al (2006), Benra and Dohmen (2007), Campbell and Paterson (2011), Gnesin and Rzadkowski (2002), Kato et al (2005), Langthjem andOlhoff (2004), andMuench et al (2010). These numerical and experimental studies offer insight on flow-induced vibration and noise phenomenon in fluid machinery; however, only a few considered the integrated interaction between the fluid and solid with a strongly coupled analysis.…”

Section: Introductionmentioning

confidence: 99%

Investigation of unsteady flow-induced impeller oscillations of a single-blade pump under off-design conditions

Pei

Dohmen

Yuan

et al. 2012

Journal of Fluids and Structures

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A Coupled Fluid–structure Analysis for 3-D Inviscid Flutter of Iv Standard Configuration

Cited by 19 publications

References 7 publications

Assessing Fan Flutter Stability in Presence of Inlet Distortion Using One-way and Two-way Coupled Methods

Assessing Fan Flutter Stability in Presence of Inlet Distortion Using One-way and Two-way Coupled Methods

Experimental Validation of Numerical Blade Flutter Prediction

Investigation of unsteady flow-induced impeller oscillations of a single-blade pump under off-design conditions

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