Finite Element Modeling of a Bird Striking an Engine Fan Blade

Mao, Ronghai; Meguid, S. A.; Ng, Teng Yong

doi:10.2514/1.24568

Cited by 44 publications

(20 citation statements)

References 20 publications

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“…However, this automatic elimination procedure usually introduces artificial oscillations in the contact force between the bird and target. Fortunately, the strategy of employing highly refined meshes that encounter element elimination can be used to alleviate this problem [21]. Modern high-performance computing systems can tolerate very small time steps in the order of 10 À9 s or even 10 À1 s, where it used to be 10 À6 -10 À7 s, just a few years ago.…”

Section: Finite Element Modeling In a Lagrangian Frameworkmentioning

confidence: 99%

FE analysis of geometry effects of an artificial bird striking an aeroengine fan blade

Meguid

Mao

2008

International Journal of Impact Engineering

116

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Section: Finite Element Modeling In a Lagrangian Frameworkmentioning

confidence: 99%

FE analysis of geometry effects of an artificial bird striking an aeroengine fan blade

Meguid

Mao

2008

International Journal of Impact Engineering

116

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“…9 Computational structural dynamics (CSD) based on the finite element method (FEM) are typically used to model the bird impact and resulting structural response since it can represent complex material behavior and non-linear geometric deformations. [10][11][12][13][14][15][16] Computational fluid dynamics (CFD) is required to accurately capture the complex flow phenomena associated with bird damaged turbofans. 17,18 Reliable CSD and CFD methods exist to compute the bird impact, structural dynamic response, and unsteady aerodynamic loads of a damaged fan blade.…”

Section: Nomenclaturementioning

confidence: 99%

Aeroelastic Response of Bird-Damaged Fan Blades Using a Coupled CFD/CSD Framework

Muir

Friedmann

2014

55th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference

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The aeroelastic response of a bird-damaged fan stage at the inlet of a high-bypass ratio turbofan engine is examined using a combined CFD/CSD model. ANSYS CFX is used for the computational fluid dynamic (CFD) calculations combined with the ANSYS Multifield (MFX) solver that couples ANSYS CFX with ANSYS Mechanical APDL to perform aeroelastic response calculations. The damaged fan sector consists of 5 blades that represent the geometry resulting from a numerical bird strike simulation. The forced response of the undamaged blades downstream of the damaged sector exhibits the highest level of structural response. The structural response of these undamaged blades is dominated by the first bending mode and increases in amplitude with time. The aeroelastic response shows a similar behavior, with the downstream undamaged blades exhibiting a growing structural response that is dominated by the first bending mode. The aeroelastic response of the damaged blades also contains contributions from the second torsion mode. An examination of the work exerted by the aerodynamic forces suggests that the growth in blade response for the upstream damaged blade is due to an aeroelastic behavior that may be indicative of a potential instability. Nomenclature D Number of RBF driver pointṡ mMass flow ratė m R Referred mass flow rate q m

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“…Modern HPC systems can tolerate very small time steps of 10 -9 s or even 10 -10 s, where it was used to be 10 -6 s to 10 -7 s just a few years ago. Thus, by refining the mesh of the Lagrangian bird, the artificial oscillations associated with the impact force are expected to be reduced to negligible levels (Mao et al 2007).…”

Section: Nomenclature (In Si Units) " a Crossmentioning

confidence: 99%

Transient three dimensional finite element analysis of a bird striking a fan blade

Mao

Meguid

2008

Int J Mech Mater Des

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A comprehensive three-dimensional nonlinear finite element analyses were carried out to examine the effects of the geometry and the incidence angle of canonical 4-lb bird striking a stationary fan blade using LS-DYNA. Three aspects of the work were accordingly examined. The first was concerned with the modeling framework used. The second with the constitutive law that governs the behaviour of the bird. The third was concerned with the influence of the geometry and the angle of incidence of the bird on the integrity of the blade. This article combines and extends the earlier works on both the Lagrangian modeling methodology (Mao et al. AIAA J. Aircr. 44(2), 583-596, 2007) and the bird geometry studies (Meguid et al. 2008) in systematic and integrated manner. Both the bird and the blade were simulated

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Finite Element Modeling of a Bird Striking an Engine Fan Blade

Cited by 44 publications

References 20 publications

FE analysis of geometry effects of an artificial bird striking an aeroengine fan blade

FE analysis of geometry effects of an artificial bird striking an aeroengine fan blade

Aeroelastic Response of Bird-Damaged Fan Blades Using a Coupled CFD/CSD Framework

Transient three dimensional finite element analysis of a bird striking a fan blade

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