Publications related to Open-loop control of compressible afterbody flows using adjoint methods

Fluid Flow Analysis of a New Finned Piston Reciprocating Compressor Using Pneumatic Analogy

The goal of this paper is to investigate the fluid flow analysis in a novel multilayered finned reciprocating compressor, adopting a so-called “pneumatic-Electric” analogy using a lumped methodology. This machine includes two sets of concentric annular fin ...

2014

Fluid Flow Analysis of a New Finned Piston Reciprocating Compressor Using Pneumatic Analogy

Alfred Rufer, Mahbod Heidari

The goal of this paper is to investigate the fluid flow analysis in a novel multilayered finned reciprocating compressor, adopting a so-called “pneumatic-Electric” analogy using a lumped methodology. This machine includes two sets of concentric annular fin ...

2014

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

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

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

Open-loop control of noise amplification in separated boundary layers

François Gallaire, Edouard Boujo

Linear optimal gains are computed for the subcritical two-dimensional separated boundary-layer flow past a bump. Very large optimal gain values are found, making it possible for small-amplitude noise to be strongly amplified and to destabilize the flow. Th ...

2013

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

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

Optimal open-loop control of the recirculation length in the wake of a cylinder

François Gallaire, Edouard Boujo

We consider steady equilibrium solution of the 2-D Navier-Stokes equations describing the flow around a circular cylinder. It is well known that, for moderate Reynolds numbers, the recirculation length is an increasing function of the Reynolds number. We f ...

2012

Experimental investigation on the aerodynamic loads and wake flow features of a low aspect-ratio circular cylinder

Giacomo Valerio Iungo

An experimental investigation on the flow features of the wake generated from a circular cylinder with finite height and placed vertically on a plane is presented. Through force measurements the mean drag coefficient is found to be roughly invariant by var ...

Elsevier2012

Open-loop control of compressible afterbody flows using adjoint methods

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Fluid Flow Analysis of a New Finned Piston Reciprocating Compressor Using Pneumatic Analogy

Fluid Flow Analysis of a New Finned Piston Reciprocating Compressor Using Pneumatic Analogy

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

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

Open-loop control of a separated boundary layer

Open-loop control of noise amplification in separated boundary layers

Vortical Flow Patterns for High Lift for High Speed Aircraft Concepts

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

Optimal open-loop control of the recirculation length in the wake of a cylinder

Experimental investigation on the aerodynamic loads and wake flow features of a low aspect-ratio circular cylinder

Fluid Flow Analysis of a New Finned Piston Reciprocating Compressor Using Pneumatic Analogy

Open-loop control of noise amplification in separated boundary layers

Fluid Flow Analysis of a New Finned Piston Reciprocating Compressor Using Pneumatic Analogy

Experimental investigation on the aerodynamic loads and wake flow features of a low aspect-ratio circular cylinder

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

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

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

Open-loop control of a separated boundary layer

Optimal open-loop control of the recirculation length in the wake of a cylinder

Vortical Flow Patterns for High Lift for High Speed Aircraft Concepts