Publications associées à Turbulent vortex shedding from a blunt trailing edge hydrofoil

Turbulent flow within a random array of rigid, emergent stems : Laboratory characterization of the drag coefficient

Anton Schleiss, Mário Jorge Rodrigues Pereira Da Franca, Ana Margarida Da Costa Ricardo

Within the bioengineering framework, designing a non-erodible channel is a complex fluid dynamics problem as it involves knowing the drag exerted on the boundary, the drag exerted on the plant stems and the overall friction slope. Most of the existing desi ...

TPU2013

High Voltage Pulsed DBD Effects on the Aerodynamic Performances and on the Shock Buffet

Christoph Hollenstein, Peter Ott, Pénélope Leyland, Philip Peschke

The applications of surface dielectric barrier discharge plasma actuators, (DBD), have known a considerable interest recently in the field of flow control. In general, such actuators consist of two electrodes separated by an insulation covering the lower e ...

2013

Open-loop control of a separated boundary layer

François Gallaire, Edouard Boujo

Linear optimal gains

G_opt(\omega)

are computed for the separated boundary-layer flow past a two-dimensional bump in the subcritical regime. Very large values are found, making it possible for small-amplitude noise to be strongly amplified and to destabi ...

Cépaduès Editions2013

Forced reattachment in separated flows: a variational approach to recirculation length reduction

François Gallaire, Edouard Boujo

Sensitivity analysis is used to design an open-loop control for separated flows. The length of the recirculation region

l_c

is expressed as a cost functional, and its sensitivity to actuation is derived analytically. This analysis allows to identify regi ...

2013

Hydrodynamics of turbulent flows within arrays of circular cylinders

Ana Margarida Da Costa Ricardo

This article presents a detailed spatial description, employing Particle Image Velocimetry, of a flow within an array of rigid and emergent cylinders with varying density in controlled laboratory conditions. Its main objective is to discuss the spatial dis ...

TPU2013

Vortical Flow Patterns for High Lift for High Speed Aircraft Concepts

Pénélope Leyland, Michele Gaffuri

Enhancing detached vortical flow over leading edges and flap surfaces allow high lift configurations in critical regimes of take-off and acceleration. In the context of the FP6 Environmentally Friendly High Speed Aircraft project HISAC, future high speed a ...

2013

Localized edge states in the asymptotic suction boundary layer

Tobias Klaus Kreilos

The dynamics on the laminar-turbulent separatrix is investigated numerically for boundary-layer flows in the subcritical regime. Constant homogeneous suction is applied at the wall, resulting in a parallel asymptotic suction boundary layer (ASBL). When the ...

2013

Acousto-fluidic system assisting in-liquid self-assembly of microcomponents

Jürgen Brugger, Alcherio Martinoli, Massimo Mastrangeli, Rosario Maurizio Gullo, Loïc Jacot-Descombes, Grégory Mermoud, Helmut Knapp

In this paper, we present the theoretical background, design, fabrication and characterization of a micromachined chamber assisting the fluidic self-assembly of micro-electro-mechanical systems in a bulk liquid. Exploiting bubble-induced acoustic microstre ...

IOP Pulishing Ltd2013

Adiabatic vertical downward air-water flow pattern map: influence of inlet device, flow development length and hysteresis effects

John Richard Thome, Navid Borhani, Marco Milan

Flow patterns for adiabatic vertical downward air water flow in an 8.8 mm diameter channel have been studied. In particular, the influence of the inlet device, the flow history and the development length on the flow pattern have been investigated and asses ...

Elsevier2013

Dynamic stall development

Karen Ann J Mulleners

Dynamic stall on an oscillating airfoil was investigated by a combination of surface pressure measurements and time-resolved particle image velocimetry. Following up on previous work on the onset of dynamic stall (Mulleners and Raffel in Exp Fluids 52(3):7 ...

2013

Turbulent vortex shedding from a blunt trailing edge hydrofoil

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Turbulent flow within a random array of rigid, emergent stems : Laboratory characterization of the drag coefficient

High Voltage Pulsed DBD Effects on the Aerodynamic Performances and on the Shock Buffet

Open-loop control of a separated boundary layer

Forced reattachment in separated flows: a variational approach to recirculation length reduction

Hydrodynamics of turbulent flows within arrays of circular cylinders

Vortical Flow Patterns for High Lift for High Speed Aircraft Concepts

Localized edge states in the asymptotic suction boundary layer

Acousto-fluidic system assisting in-liquid self-assembly of microcomponents

Adiabatic vertical downward air-water flow pattern map: influence of inlet device, flow development length and hysteresis effects

Dynamic stall development

Turbulent flow within a random array of rigid, emergent stems : Laboratory characterization of the drag coefficient

High Voltage Pulsed DBD Effects on the Aerodynamic Performances and on the Shock Buffet

Forced reattachment in separated flows: a variational approach to recirculation length reduction

Open-loop control of a separated boundary layer

Hydrodynamics of turbulent flows within arrays of circular cylinders

Vortical Flow Patterns for High Lift for High Speed Aircraft Concepts

Localized edge states in the asymptotic suction boundary layer

Acousto-fluidic system assisting in-liquid self-assembly of microcomponents

Adiabatic vertical downward air-water flow pattern map: influence of inlet device, flow development length and hysteresis effects

Dynamic stall development