ESR 1: Investigation of turbulence-surface interaction noise mechanisms and their reduction using porous materials
Objectives: Investigate theoretically, experimentally and numerically the LE turbulence distortion effects in presence of porous materials; correlate the source and far-field noise for a rod-airfoil case and predict the potential benefits for airframe devices.
Expected Results: New insight and physical models for the attenuation of turbulence-surface interaction noise, accounting for viscous losses and turbulence distortion; assessment of the potential of this technology for airframe high-lift devices and ventilation systems.
Planned secondments: KTH, Profs. Abom and Bodén, at M18 for 2 months: measurement/modelling of micro-perfs; UdeS, Prof. Moreau, at M24 for 1 month: investigation of porous materials; TUD, Dr. Ragni, at M30 for 1 month: PIV measurements of rod-airfoil configuration; CETIAT, Dr. Guédel, at M36 for 2 weeks: applicability to building HVAC systems.
2017 - Master’s Degree in Mechanical Engineering at Università Politecnica delle Marche, Italy, with a thesis carried out at the von Karman Institute for Fluid Dynamics, in Brussels, Belgium
2014 – Bachelor’s Degree in Mechanical Engineering at Università Politecnica delle Marche, Italy
ESR 2: Flow and acoustic control for automotive low-speed cooling fansFlow and acoustic control for automotive low-speed cooling fans
Objectives: Investigate experimentally, theoretically and numerically the performance of micro-perforate liners for acoustic vs. hydrodynamic absorption; develop a fast prediction method to predict the noise of a low-speed cooling fan including mitigation technologies.
Expected Results: Physical models and design guidelines for the hydrodynamic and acoustic absorptions in low-speed fan systems; low-order prediction model for industrial pre-design stage.
Planned secondments: VAL, Dr. Henner, at M15 for 2 weeks: acquiring baseline knowledge about automotive low-speed cooling fans; KTH, Profs. Bodén and Abom, at M24 for 2 months: measurement/modelling of micro-perfs; PSA, Dr. van Herpe, at month 36 for 2 weeks: automotive integration aspects; CETIAT, Dr. Guédel, at month 38 for 2 weeks: applicability to building HVAC.
2017 - Master’s Degree in Aerospace Engineering at Politecnico di Torino, Italy, with a thesis carried out at the University of Southampton, UK.
2014 - Bachelor’s Degree in Aerospace Engineering at Politecnico di Torino, Italy
ESR 3: Effect of high level acoustic excitation and combinations of grazing/bias flow (“complex loads”) on micro-perforate impedance
Objectives: Experimental investigations using advanced acoustic and optical measurement techniques, to upgrade theoretical / numerical models; analyse the data using SI techniques.
Expected Results: Methods to analyse non-linear impedance; validated models for micro-perforate impedance under “complex loads”; input to design optimization for micro-perforated sheets; new databases of acoustic properties of micro-perforates under complex loads.
Planned secondments: TUD, Prof. Scarano, at M18 for 1 month: PIV training; DLR, Dr. Herr, at M27 for 1 month: liner testing training; TNF, Mr. Caule, at M36 for 2 weeks: aeronautical applications aspects; VW, Dr. Hartmann, at M38 for 2 weeks: automotive applications.
Niloofar Sayyad Khodashenas
- 2014 Bachelor's Degree in Electrical and Control Engineering Islamic Azad University, Iran
- 2017 Master's Degree in Electrical and Control Engineering Islamic Azad University, Iran
ESR 4: Flow-acoustic interaction with innovative materials
Objectives: Study flow-acoustic interactions with metamaterials and compliant MEMS surfaces with grazing flow; analytical analyses, high fidelity numerical simulations as well as high-resolution experimental techniques applied to generic and industrial cases.
Expected Results: Model of the physical mechanisms responsible for the coupling between flow and materials; guidelines to materials manufacturers and to numerical software developers.
Planned secondments: SNT, Mr. Corin, at M15 for 2 weeks: to learn about micro-perforates; KTH, Profs. Bodén and Abom, at M18 for 1 month: to compare metamaterials with micro-perfs; EPFL, Dr. Lissek, at M30 for 1 month: to compare active and passive compliant materials; SISW, Dr. Bériot, at M40 for 1 month: to transfer knowledge to code manufacturer.
Massimo Emiliano d'Elia
ESR 5: Active MDOF resonators for acoustic liners
Objectives: Develop an ad hoc numerical platform that accounts for both the acoustic field with flow and the electromechanical coupling in active MDOF resonators; numerical simulations and experiments applied to a generic structure and to a generic fuselage demonstrator.
Expected Results: Better understanding and modelling of active MDOF liner in presence of flow; development and assessment of an active MDOF liner prototype for aircraft engines applications.
Planned secondments: SISW, Dr. Bériot, at M15 for 1 month: to upgrade the numerical simulation platform; ECL, Dr. Collet, at M21 for 3 months: to aggregate the numerical models developed by ECL and EPFL; LAUM/CNRS, Profs. Aurégan, at M33 for 1 month: to identify potential MEMS candidate; ADE, Dr. Scheel, at M39 for 3 months: application to full-scale generic fuselage demonstrator.
2017 : Engineer’s degree at Supélec,Gif-Sur-Yvette, France
Between 2012 and 2017 : Diverse research projects at EPFL, Laboratoire d’Acoustique de l’Université du Maine, Active Audio…
ESR 6: Separation and wake noise reduction by means of streamwise vortex generators
Objectives: Identify the noise sources in the flow field and their attenuation with streamwise vortex generators; application to generic airfoils and wind turbine blade.
Expected Results: Numerical investigations of jet VGs and rod VGs by means of RANS-LES for wind turbine profile without/with streamwise vortex generators; validation with experimental data.
Planned secondments: SWP, Dr. Oerlemans, at M20 for 1 month: to assess the applicability to full-scale wind turbine blades; TUD, Prof. Scarano, at M28 for 2 months: to measure source field alteration and validate simulations; VKI, Prof. Schram, at M32 for 2 months: to predict the sound reduction.
ESR 7: Trailing edge noise reduction by porous materials
Objectives: This project entails the characterization of the properties of metal-foam and the validation of metal-foam modelling in computational studies. This will be followed by studies to discover its potential in reducing rotor-stator interaction noise, primarily in turbofan.
Expected Results: Better understanding on the effect of metal-foam characteristics (e.g., resistivity and porosity) to noise reduction leading to optimization potential. This knowledge would also improve prediction capabilities of future numerical techniques. Noise reduction of > 2 dB is expected at the frequency range of interest when metal-foam is applied on turbofan’s outlet guide vane (OGVs).
Planned secondments: TBA
At present, he is a doctoral candidate within the Aeroacoustics research group of the Faculty of Aerospace Engineering, Delft University of Technology in the Netherlands. He completed his undergraduate study, majoring in aerospace Engineering, at Bandung Institute of Technology, Indonesia (2014). Afterward, he completed his M.S. in Aerospace Engineering from Korea Advanced Institute of Science and Technology, South Korea (2017). His current research interest is in aeroacoustics of turbulence impingement noise (TIN).
ESR 9: Fan proximity acoustic treatments for improved noise suppression in turbofan engines
Objectives: Develop understanding and prediction models for the noise suppression due to fan proximity liners and provide a quantitative estimate of the benefits in generic and industrial cases.
- Simple theoretical models and low-order numerical simulations of the physical mechanisms validated by comparison with published experimental data and test results to be obtained on the experimental rig at ECL.
- Prediction models to guide the choice of low-Technology Readiness Level (TRL) liner designs to provide the optimal noise reduction and meet the installation constraints (volume, weight, etc).
Planned secondments:ECL, Prof. Roger, at M29 for 2 months: to study the effect of the tip clearance on the liner performance; SISW, Dr Bériot, at M23 for 1 month: to run acoustic simulations of over-the-tip liners; TNO, Mr González Díez, at M39 for 2 weeks: applicability to high-pressure turbo-compressors.
Sergi Pallejà Cabré
2016 – 2017: MSc in Aerospace Dynamics at Cranfield University, UK
2015 – 2017: Master’s Degree in Aeronautical Engineering at ETSEIAT-UPC, Spain
2011 – 2015: Bachelor’s Degree in Aerospace Vehicle Engineering at ETSEIAT-UPC, Spain
ESR 10: Development of intelligent lightweight material solutions for improved vibro-acoustic transmission problems
Objectives: Investigation of novel materials and development of innovative structures using virtual design tools; physical prototyping applied to rectangular channel and generic fuselage demonstrator.
Expected Results: Innovative material solutions for noise and vibration isolation; real life demonstration of potential under realistic conditions (loads and boundary conditions).
Planned secondments: CNRS/LAUM, Profs. Auregan and Dazel, at M15 for 3 months: fundamental studies on metamaterials; SISW, Dr. Beriot, at M24 for 1 months: test industrial CAE tools for virtual design; VW, Dr. Hartmann, at M34 for 2 months: to benchmark solutions with industrial automotive requirements; ADE, Dr. Scheel, at M39 for 3 months: application to generic fuselage demonstrator.
Felipe Alves Pires
ESR 11: Reduction of broadband aerodynamic noise of airfoils by geometrical and structural modifications
Objectives: Assess experimentally and through empirical/analytical models the potential reductions of the turbulence-impingement noise by a wavy LE, a rigid-porous structure and a compliant wall; assess the techniques on a car-engine cooling fan.
Expected Results: Improved understanding of the physics of turbulence-impingement noise around leading edges and of the effect of material or geometrical modifications; analytical models for turbulence-impingement noise predictions;demonstration in low-speed cooling fan systems.
Planned secondments: TUD, Dr. Ragni, at M18 for 1 month: PIV measurements of turbulence-airfoil interaction; VAL, Dr. Henner, at M22 for 1 month: to gain knowledge on car-engine cooling fans and study of wavy leading edges; NTUA, Prof. Giannakoglou, at M30 for 2 months: to perform optimization studies; CETIAT, Dr. Guédel, at M38 for 1 month: assess potential for building HVAC.
2015 - Master's Degree in Computational Mechanics, NTUA
2015 - Acoustic Consultant at Acoustic Science company, Greece
2013 - Diploma Degree in Mechanical Engineering (MSc equivalent) at National Technical University of Athens
ESR 12: Distributed Impedance Control for Acoustic Transmission mitigation
Objectives: Performance Analyses of the Distributed Impedance Control, its implementation and optimization on a prototype; validation on ADE generic fuselage demonstrator.
Expected Results:Demonstration of structural noise transmission reduction; design methodologies; integrated innovative sound package.
Planned secondments: EPFL, Dr. Lissek, around M24 for 3 months: nonlinear shunts on micro loudspeakers network; KUL, Prof. Desmet, at M32 for 3 months: to test solution on KUL application case; ADE, Dr. Scheel, at M39 for 3 months: application to generic fuselage demonstrator.
Emanuele de Bono
2017 - Master Degree in Aerospace Engineering in the University Federico II of Naples, Italy, with a thesis work on Automotive Acoustics, developed in VOLVO Trucks, in Lyon, France
ESR 13: CFD-CAA analysis & optimization methods, with industrial applications
Objectives: Development of a CAA tool and coupling with a GPU-enabled compressible CFD solver; development of the (continuous) adjoint to the coupled CFD-CAA model; testing and validation in small-medium scale cases; adaptation of non-intrusive polynomial chaos approach for UQ in CFD-CAA problems; application to VW automotive benchmark.
Expected Results: New optimization approach based on the (continuous) adjoint to the coupled CFD-CAA tool; new UQ analysis based on polynomial chaos for direct CFD-CAA problems; CFD/CAA benchmark databases for aircraft/automotive applications.
Planned secondments: VKI, Prof. Schram, at M15 for 1 months: to get familiar with noise generation and attenuation processes; SISW, Dr. Bériot, at M16 for 2 months: to learn commercial CAA methods for aeroacoustics; VW, Dr. Hartmann, at M27 for 2 months: to get familiar with the processes used by the automotive industry to numerically simulate noise generation and propagation.
ESR 14: Efficient numerical modelling of advanced liners
Objectives: Extend non-overlapping domain decomposition methods to non-local liners; apply the newly developed method to simple case at CNRS/LAUM and to the TNF rig at ECL.
Expected Results: New numerical models with drastically lower CPU costs compared to current state-of-the-art; validation databases.
Planned secondments: SOTON/ISVR, Dr. Gabard, at M18 for 3 months: modelling of liners with mean flow; CNRS/LAUM, Prof. Aurégan, at M24 for 3 months: to simulate new liner designs; KUL, Prof. Desmet, at M30 for 1 month: to model low-transmission material; TNF, Mr. Caule, at M36 for 2 months: to investigate the potential of the new approach in an industrial optimization design process.
2015-2016 , MSc in Computational Mechanics at University of Stuttgart, Stuttgart, Germany
2014-2015 , MSc in Computational Mechanics at Universitat Politècnica de Catalunya (UPC), Barcelona, Spain
2009-2013 Bachelors in Mechanical Engineering, Pune University (B.Eng.), Pune, India
ESR 15: Experimental investigation of noise from serrated trailing edges under realistic flow conditions
Objectives: Experimentally investigate the flow characteristics near serrated trailing edges; Explore novel techniques for turbulent boundary layer trailing-edge noise reduction.
Expected Results: Flow field and acoustic measurements over a flapped flat-plate model. Acoustic measurements of a DU96-W-180 airfoil with trailing-edge serrations .
Planned secondments: 3 months within Siemens where numerical simulations will be performed to assist the experimental campaigns.
Lourenço Tércio Lima Pereira
2016-2018: Masters in Mechanical Engineering, University of Sao Paulo, Brazil
2012-2013: Emphasis in Computational Fluid Mechanics, University of Sao Paulo, Brazil
2010-2015: Undergraduate in Aeronautical Engineering, University of Sao Paulo, Brazil
ESR 16: Reduction of the broadband noise of centrifugal fans used on HVAC in buildings
Objectives: Experimental investigation of blade trailing-edge and leading-edge serrations, porous materials and wavy surfaces; assess acoustic and aerodynamic effects; perform RANS simulations to get an insight of the flow pattern; assess the potential for CFD-driven optimization in collaboration with NTUA.
Expected Results: First assessment of novel flow and acoustic control approaches for low-speed centrifugal fans; experimental and numerical databases.
Planned secondments: VAL, Dr. M. Henner, at month 15 for 2 weeks: to learn about automotive low-speed axial cooling fans; ECL, Prof. M. Roger, at month 17 for 1 month: to learn modelling approaches for low-speed axial fans; NTUA, Dr. K. Giannakoglou, at month 36 for 2 months, to evaluate the possibility of optimization of the most promising flow and acoustic control approaches.
Ignacio Zurbano Fernández
2015-2017 Integration engineer at CERN, Switzerland
2015 Bachelor+Master in Mechanical Engineering at Universidad de Oviedo, Spain, with a thesis carried out at Arts et Métiers Paris Tech, France