Quentin Gallas

Office National d'Études et de Recherches Aérospatiales

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Abdelkrim Talbi

Centre National de la Recherche Scientifique

Cécile Ghouila-Houri

Centre National de la Recherche Scientifique

R. Viard

Université de Lille

Philippe Pernod

École Centrale de Lille

Alain Merlen

Institut d'électronique de microélectronique et de nanotechnologie

ÉG

Éric Garnier

Centre National de la Recherche Scientifique

Louis N. Cattafesta

Illinois Institute of Technology

Jérôme Delva

Laboratoire de Mécanique des Fluides de Lille - Kampé de Fériet

ÉG

Éric Garnier

Office National d'Études et de Recherches Aérospatiales

Mark Sheplak

University of Florida

Cooperative Institutions

Centre National de la Recherche Scientifique

Université de Lille

Office National d'Études et de Recherches Aérospatiales

École Centrale de Lille

Institut d'électronique de microélectronique et de nanotechnologie

Laboratoire de Mécanique des Fluides de Lille - Kampé de Fériet

Université Paris-Saclay

Université Polytechnique Hauts-de-France

University of Florida

Laboratoire Leprince-Ringuet

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Modeling and Development of Synthetic Jet Actuators in Flow Separation Control Application

IUTAM bookseries (2008)

Quentin Gallas

Synthetic jet

Flow Control

Anemometer

10.1007/978-1-4020-6858-4_43

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Citations (3)

ONERA-DLR Common Research Project "Cube": Comparison between planar PIV and CFD results

Quentin Gallas Anne Gilliot Jean-Claude Monnier Jérôme Delva Claude Geiler

The CUBE CRP is dedicated to the generation of an experimental data base of the flow around a 3D obstacle (here a cube) for validation of advanced CFD simulation tools. It is a 30 months research activity program and has started beginning of 2015. Planar PIV, planar time-resolved PIV and tomographic PIV were recorded for two hydrodynamic configurations: laminar and turbulent boundary layers in interaction with the cube at varying free stream conditions.

Cube (algebra)

Data cube

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Design Optimization Tool for Synthetic Jet Actuators Using Lumped Element Modeling

Quentin Gallas Mark Sheplak Louis N. Cattafesta Susan A. Gorton

The performance specifications of any actuator are quantified in terms of an exhaustive list of parameters such as bandwidth, output control authority, etc. Flow-control applications benefit from a known actuator frequency response function that relates the input voltage to the output property of interest (e.g., maximum velocity, volumetric flow rate, momentum flux, etc.). Clearly, the required performance metrics are application specific, and methods are needed to achieve the optimal design of these devices. Design and optimization studies have been conducted for piezoelectric cantilever-type flow control actuators, but the modeling issues are simpler compared to synthetic jets. Here, lumped element modeling (LEM) is combined with equivalent circuit representations to estimate the nonlinear dynamic response of a synthetic jet as a function of device dimensions, material properties, and external flow conditions. These models provide reasonable agreement between predicted and measured frequency response functions and thus are suitable for use as design tools. In this work, we have developed a Matlab-based design optimization tool for piezoelectric synthetic jet actuators based on the lumped element models mentioned above. Significant improvements were achieved by optimizing the piezoceramic diaphragm dimensions. Synthetic-jet actuators were fabricated and benchtop tested to fully document their behavior and validate a companion optimization effort. It is hoped that the tool developed from this investigation will assist in the design and deployment of these actuators.

Synthetic jet

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Citations (2)

Scaling of pressure drop for oscillatory flow through a slot

Physics of Fluids (2007)

Reni Raju Quentin Gallas Rajat Mittal Louis N. Cattafesta

Reduced-order modeling and design of zero-net mass-flux actuators require an understanding of several fundamental flow mechanisms governing the performance of these devices. One such aspect is the pressure drop due to oscillatory flow through a slot. In this Brief Communication, we use numerical simulations and experiments to examine physics-based scaling laws for the various mechanisms that determine the net pressure drop, and critically evaluate a proposed phenomenological model for predicting the nonlinear component of the pressure drop in oscillatory slot flows.

Mass flux

Scaling law

10.1063/1.2749814

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Citations (20)

High temperature gradient micro-sensors for skin-friction measurement in flow control applications

Cécile Ghouila-Houri Manon Benedito Éric Garnier Abdelkrim Talbi A. Mazzamurro

Robust micro machined high temperature gradient calorimetric (HTGC) transducers were designed and developed for flow separation control. Based on thermal principle, the transducers measure the amplitude and the sign of skin friction, making them particularly useful for flow separation detection. A set of 12 calorimetric micro-sensors along with miniaturized electronics was implemented on a flap model also equipped with pulsed jets. Flow control experiments were successfully conducted as the natural separation occurring on the model was detected by the micro sensors network and controlled by pulsed jet actuation. Ongoing work concerns the realization of closed-loop flow control experiments using the micro-sensors for feedback.

Flow Control

Temperature Gradient

Realization (probability)

Synthetic jet

Separation (statistics)

10.1109/dtip54218.2021.9568681

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Citations (0)

Wall Shear Stress and Flow Direction Thermal MEMS Sensor for Separation Detection and Flow Control Applications

Procedia Engineering (2016)

Cécile Ghouila-Houri Jean-Claude Gerbedoen Julien Claudel Quentin Gallas Éric Garnier

We report a study on a wall shear stress and flow direction hot-wire based sensor operating in anemometric mode. The sensor is designed to achieve fast response time and high sensitivity. The sensor structure consists in free hot wires over insulator bridges and exhibits sensitivity to wall shear stress variations and to flow direction. The sensor can be wall-mounted for applications such as flow control or turbulence analysis. Finite elements simulations have been made to demonstrate a fast thermal response time to fluid velocity of about 300 μs in constant current operating mode and a sensitivity to wall shear-stress fluctuations. Electrical characterizations and wind tunnel experiments were performed to analyze the sensor response to respectively heat power and flow velocity.

Flow Control

10.1016/j.proeng.2016.11.278

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Citations (6)

Wind tunnel integration of Micro-Magneto-Mechanical Systems (MMMS) microvalves for flow control experiments

T. Arnoult Colin Leclercq Cécile Ghouila-Houri A. Mazzamurro Manon Benedito

des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.

Magneto

Flow Control

10.1109/dtip54218.2021.9568496

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High temperature gradient micro-sensors array for flow separation detection and control

Smart Materials and Structures (2019)

Cécile Ghouila-Houri Abdelkrim Talbi R. Viard Quentin Gallas Éric Garnier

come from teaching and research institutions in France or abroad, or from public or private research centers.L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.

Flow Control

Separation (statistics)

Trailing edge

Leading edge

Sensor array

Synthetic jet

10.1088/1361-665x/ab4be4

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Citations (8)

IEMN/LEMAC-LICS Magneto-mechanical micro-actuators and active flow control: review of the last 15 years results

HAL (Le Centre pour la Communication Scientifique Directe) (2019)

Abdelkrim Talbi R. Viard Cécile Ghouila-Houri Éric Garnier Quentin Gallas

Magneto

Flow Control

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Citations (0)

Low Dimensional Modeling for Zero-Net Mass-Flux Actuators

Quentin Gallas Ryan Holman Reni Raju Rajat Mittal Mark Sheplak

The flow field generated by a zero-net mass-flux (ZNMF) actuator is investigated via both numerical simulations and experiments to augment the current understanding of the flow physics of the orifice. The results aid in improving the accuracy of low dimensional lumped element ZNMF models suitable for design. Dimensional analysis yields a number of key parameters that govern the characteristics of this flow. Among them for a sharp rectangular slot or circular orifice are the Reynolds number, the dimensionless stroke length, and the orifice height-to-diameter ratio. Variation of these parameters shows that the flow field differs appreciably from the exact linear solution of pipe flow driven by an oscillatory pressure gradient. In particular, depending on the stroke length and the orifice geometry, the pressure drop in the orifice may be dominated by nonlinear minor losses due to entrance/exit effects, or linear major losses associated with the presence of a nominally fully-developed region in the central region of the orifice/slot.

Zero (linguistics)

Net (polyhedron)

10.2514/6.2004-2413

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Citations (45)