Initial Modelling of Bird Strike by Numerical Simulation in Varied L/D Ratio of Bird Geometry

Yuniarti, Endah; H, Simon Shindu; Sitompul, Sahril Afandi

doi:10.28989/senatik.v4i0.165

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“…Simple geometries such as straight-ended cylinders, spheres, ellipsoids, and hemisphericalended cylinders are commonly used as bird models in simulations. The noted substitute bird models have been implemented in many studies for many years and have yielded a lot of valuable results [7][8][9][10]. However, as compared to traditional bird models, a realistic bird model provides results that are more consistent with experiments [11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Effect of Impact and Bearing Parameters on Bird Strike with Aero-Engine Fan Blades

Hedayati

et al. 2021

Applied Sciences

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Bird strikes are one major accident for aircraft engines and can inflict heavy casualties and economic losses. In this study, a smoothed particle hydrodynamics (SPH) mallard model has been used to simulate bird impact to rotary aero-engine fan blades. The simulations were performed using the finite element method (FEM) at LS-DYNA. The reliability of the material model and numerical method was verified by comparing the numerical results with Wilberk’s experimental results. The effects of impact and bearing parameters, including bird impact location, bird impact orientation, initial bird velocity, fan rotational speeds, stiffness of the bearing, and the damping of the bearing on the bird impact to aero-engine fan blade are studied and discussed. The results show that both the impact location and bird orientation have significant effects on the bird strike results. Bird impact to blade roots is the most dangerous scenario causing the impact force to reach 390 kN. The most dangerous orientation is the case where the bird’s head is tilted 45° horizontally, which leads to huge fan kinetic energy loss as high as 64.73 kJ. The bird’s initial velocity affects blade deformations. The von Mises stress during the bird strike process can reach 1238 MPa for an initial bird velocity of 225 m/s. The fan’s rotational speed and the bearing stiffness affect the rotor stability significantly. The value of bearing damping has little effect on the bird strike process. This paper gives an idea of how to evaluate the strength of fan blades in the design period.

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Section: Introductionmentioning

confidence: 99%

Effect of Impact and Bearing Parameters on Bird Strike with Aero-Engine Fan Blades

Hedayati

et al. 2021

Applied Sciences

View full text Add to dashboard Cite

show abstract

Initial Modelling of Bird Strike by Numerical Simulation in Varied L/D Ratio of Bird Geometry

Cited by 1 publication

References 0 publications

Effect of Impact and Bearing Parameters on Bird Strike with Aero-Engine Fan Blades

Effect of Impact and Bearing Parameters on Bird Strike with Aero-Engine Fan Blades

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