Aerodynamic force evaluation for ice shedding phenomenon using vortex in cell scheme, penalisation and level set approaches

Morency, François; Beaugendre, Héloïse; Gallizio, Federico

doi:10.1080/10618562.2012.739683

Cited by 12 publications

(11 citation statements)

References 29 publications

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“…In this work, the Poisson equation (step (27) in algorithm 1) is solved on the grid using Fast Fourier Transforms (FFT) and periodic boundary conditions. Following section 4, the discretization of this equation is preceded by a vorticity absorption (step (26)) and followed by a velocity correction (step (28)).…”

Section: Algorithm 1 Initializationmentioning

confidence: 99%

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Direct numerical simulations of three-dimensional flows past obstacles with a vortex penalization method

2016

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Highlights • A vortex penalization method is proposed to model 3D incompressible flows • Appropriate far field boundary conditions are handled in a FFT-based Poisson solver • The cost is reduced extending a directional remeshing technique to the 3D algorithm • The computational code is validated and applied to flows past a sphere and hemisphere • At Re=1000 the hemisphere maintains its wake symmetry much longer than the sphere 1 ACCEPTED MANUSCRIPT Abstract A vortex method with penalization is proposed in order to simulate threedimensional incompressible bluff body flows. This approach combines the robustness of vortex methods and the flexibility of penalization methods to impose boundary conditions on the obstacle. Far field boundary conditions are handled in a FFT-based Poisson solver. A validation of the proposed numerical method is carried out in the context of flow past a sphere and further simulations are performed in the more challenging case of flow past a hemisphere.Keywords: flow past a sphere, flow past a hemisphere, vortex methods, particle methods, penalization method, semi-Lagrangian methods.

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Section: Algorithm 1 Initializationmentioning

confidence: 99%

“…The method adopted in this work to compute the aerodynamic force in three-dimensions is the numerical approach introduced by [27] under the name of change of momentum.…”

Section: Forces Evaluationmentioning

confidence: 99%

Direct numerical simulations of three-dimensional flows past obstacles with a vortex penalization method

2016

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“…The shedding of ice from helicopter rotors presents a significant problem to helicopter safety [83][84][85][86]. Ice may re-impinge on the tail rotor, fly into the engine, or strike the body of the rotorcraft.…”

Section: Ice Shedding In a Rotating Environmentmentioning

confidence: 99%

The measurement of the adhesion of glaze ice.

Hardesty¹

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Icing is a lethal and costly aviation hazard affecting aircraft of all sizes ranging from small UAVs to large commercial craft such as the Boeing 787, resulting in hundreds of deaths over the last century and resulting in billions of dollars of economic impact. Three predominant types of icing, namely, airframe icing, engine icing, and rotorcraft icing, dominate aircraft icing research. Each type poses unique challenges. In the case of rotor icing, attention needs to give to the rotating environment with large oscillatory loads and icing conditions. In the case of airframe icing, special attention needs to be paid to a variety of loading cases from the available options for de-icing and anti-icing equipment. In the case of engine icing, the formation mechanism is poorly understood and the structure of the ice needs to be studied in greater detail. Airframe icing requires However, all three share the same fundamental problem that ice sticks to surfaces. How strongly ice adheres to a surface dictates how hard it is to remove. The adhesion strength then regulates the primary threat from icing-the maximum aerodynamic penalty that accretion will have. It also dictates the threat of impingement from shed ice elsewhere on the aircraft, such that a piece of ice from the main rotor could strike the tail rotor on a helicopter, destroying it.

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“…where A corresponds to the surface area of the circular back face of the hemisphere. Concerning the aerodynamic forces F x ,F y and F z exerced on the hemisphere and involved in the above expressions, they are computed in the present study by integrating in the solid body B the difference between the flow velocity u and the numerical penalized velocity u λ = u 1+λ∆ t [28] :…”

Section: )mentioning

confidence: 99%

A Semi-Langrangian Vortex Penalization Method for 3D Incompressible Flows

sci¹

2019

JMS

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A remeshed Vortex method is proposed in this work to simulate threedimensional incompressible flows. The convection equation is solved on particles, using a Vortex method, which are then remeshed on a Cartesian underlying grid. The other differential operators involved in the governing incompressible Navier-Stokes equations are discretized on the grid, through finite differences method or in spectral space. In the present work, the redistribution of the particles on the Cartesian mesh is performed using a directional splitting, allowing to save significant computational efforts especially in the case of 3D flows. A coupling of this semi-Lagrangian method with an immersed boundary method, namely the Brinkman penalization technique, is proposed in this paper in order to efficiently take into account the presence of solid and porous obstacles in the fluid flow and then to perform passive flow control using porous medium. This method, which combines the robustness of particle methods and the flexibility of penalization method, is validated and exploited in the context of different flow physics.

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Aerodynamic force evaluation for ice shedding phenomenon using vortex in cell scheme, penalisation and level set approaches

Cited by 12 publications

References 29 publications

Direct numerical simulations of three-dimensional flows past obstacles with a vortex penalization method

Direct numerical simulations of three-dimensional flows past obstacles with a vortex penalization method

The measurement of the adhesion of glaze ice.

A Semi-Langrangian Vortex Penalization Method for 3D Incompressible Flows

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