Concept

Profil (aérodynamique)

Publications associées (112)

A time-resolved dynamic stall investigation based on coherent structure analysis

Dynamic stall on an airfoil comprises a series of complex aerodynamic phenomena in response to an unsteady change of the angle of attack. It is accompanied by a lift overshoot and delayed massive flow separation with respect to static stall. The classical ...

2010

Dynamic of cavitation bubble in a flowing liquid with a pressure gradient

Mohamed Farhat, Marc Tinguely

In the present study, a high energy pulsed laser is used to generate a millimetric cavitation bubble within a water °ow over a symmetric hydrofoil. The bubble is initiated at di®erent locations in the vicinity of the hydrofoil leading edge. A high speed ca ...

American Physical Society2009

Tracking Odor Plumes in a Laminar Wind Field with Bio-Inspired Algorithms

Alcherio Martinoli, Thomas Lochmatter

We introduce a novel bio-inspired odor source localization algorithm (surge- cast) for environments with a main wind ﬂow and compare it to two well-known algorithms. With all three algorithms, systematic experiments with real robots are carried out in a wi ...

Springer2009

Vortex shedding from blunt and oblique trailing edge hydrofoils

François Avellan, Mohamed Farhat, Philippe Ausoni, Amirreza Zobeiri

The phenomenon of vortex shedding behind a hydrofoil is an important issue from both scientific and technical point of view. The resulting fluctuating forces may lead to excessive vibrations and premature cracks in the hydraulic machines. According to prev ...

Brno university of technology2009

Turbulent vortex shedding from a blunt trailing edge hydrofoil

Philippe Ausoni

Placed in a fluid stream, solid bodies can exhibit a separated flow that extends to their wake. The detachment of the boundary layer on both upper and lower surfaces forms two shear layers which generate above a critical value of Reynolds number a periodic ...

EPFL2009

Theoretical Analysis of Three Bio-Inspired Plume Tracking Algorithms

Alcherio Martinoli, Thomas Lochmatter

We derive the theoretical performance of three bio-inspired odor source localization algorithms (casting, surge-spiral and surge-cast) in laminar wind flow. Based on the geometry of the trajectories and the wind direction sensor error, we calculate the dis ...

2009

A Comparison of Casting and Spiraling Algorithms for Odor Source Localization in Laminar Flow

Alcherio Martinoli, Thomas Lochmatter, Xavier Raemy, Saurabh Indra

We compare two well-known algorithms for locating odor sources in environments with a main wind flow. Their plume tracking performance is tested through systematic experiments with real robots in a wind tunnel under laminar flow condition. We present the s ...

2008

Tracking an Odor Plume in a Laminar Wind Field with the Crosswind-Surge Algorithm

Alcherio Martinoli, Thomas Lochmatter

We introduce a novel bio-inspired odor source localization algorithm (surge-cast) for environments with a main wind flow and compare it to two well- known algorithms. With all three algorithms, systematic experiments with real robots are carried out in a w ...

2008

Redistribution of velocity and bed-shear stress in straight and curved open channels by means of a bubble screen: Laboratory experiments

Koen Blanckaert

Open-channel beds show variations in the transverse direction due to the interaction between downstream flow, cross-stream flow, and bed topography, which may reduce the navigable width or endanger the foundations of structures. The reported preliminary la ...

2008

Simulation Experiments with Bio-Inspired Algorithms for Odor Source Localization in Laminar Wind Flow

Alcherio Martinoli, Thomas Lochmatter

We compare three bio-inspired odor source localization algorithm (casting, surge-spiral and surge-cast) for environments with a main wind flow in simulation. The wind flow is laminar and the simulation setup similar to the setup in the wind tunnel in which ...

IEEE2008

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