A total of 17 PhD positions are available at 8 universities, 1 research centre and 4 industries, in the framework of the European Marie Curie European Training Network (ETN) zEPHYR. This project is focused on the development of performant wind farms by addressing simultaneously the individual performance of each turbine composing the wind farm, and the efficient harvesting of the local wind resources in on-shore and urban environments. The researchers recruited in zEPHYR will investigate emerging technologies through laboratory experiments, theoretical modelling and numerical simulations addressing the following aspects: mesoscale and microscale atmospheric boundary layer simulations, rotor aerodynamics, aeroacoustics and structural dynamics, atmospheric propagation and human factors, uncertainty quantification, sensitivity analysis and multi-physical optimization.
ESR 1: ABL simulations with uncertain weather parameters and impact on WT performance and near-field noise
Objectives: ESR1 will base his/her research on the IVKDF mesoscale and microscale simulation framework and extent the UQ analysis previously applied to pollutant dispersion, to the aerodynamic performance and near-field noise of WTs; small-scale experimental validation in anechoic lab; evaluation applicability of the developed tools to automotive cooling fans.
Expected Results: ABL simulation platform coupled with atmospheric propagation solver; UQ analysis of the impact of uncertain weather inputs on the power output and noise radiated towards a near-field hemisphere centered on the Task 5.1 WT; sensitivity analysis applied to the noise emissions and cooling efficiency of an automotive low-speed cooling fan.
Planned secondments: SGRE, Dr. Oerlemans, at M15 for 1 month: familiarization with the HAWT model; NTU, Prof. Ianiakiev, at M21 for 1 month: familiarization with urban wind engineering; UPM, Prof. Valero, at M30 for 2 months: comparison WRF-LES coupling results with stochastic synthesis results; VAL, Dr. Henner, at M39 for 3 month: application developed methods to automotive cooling fan.
Announcement: https://euraxess.ec.europa.eu/jobs/433104 (closed)
MSc - Dept. of Heat & Fluid, Mechanical Engineering, Istanbul Technical University, 2017
BSc - Dept. of Mechanical Engineering, Mechanical Engineering, Istanbul Technical University, 2014.
Baris has experience both in numerical and experimental fluid dynamics. His main research interests are computational fluid dynamics (CFD), atmospheric flows, turbulent flows, turbulence modeling, and aerodynamics. He worked in Arcelik A.S. as a research and development engineer during his Master's education. Some of his industrial projects are CFD for noise level reduction by simulating air flow path of a canister type vacuum cleaner, CFD analysis and design optimization of different types of double-inlet radial fan airfoils used in silent hair dryer, experimental investigation of noise level reduction for kettles. He received his master's degree with the project entitled "Numerical modeling of dust particle trajectories in a cyclonic vacuum cleaner and determination of dust collection efficiency" in collaboration with Arcelik A.S. and Istanbul Technical University.
ESR 2: Atmospheric propagation with uncertain weather parameters
Objectives: ESR2 will quantify the variability of the noise footprint of a given wind farm, due to uncertain weather conditions; he/she will upgrade the ray-tracing solver previously developed at IVKDF in order to take into account atmospheric effects obtained from ABL solution; learning measurement of atmospheric data and associated uncertainty in Kenya.
Expected Results: Atmospheric propagation model; new coupling strategy between near-field aeroacoustic solver and atmospheric propagation solver; noise footprint including uncertainty quantification for the complex terrain wind farm of Task 5.2 and a VAWT of Task 5.3.
Planned secondments: SISW, Dr. Le Bras, at M15 for 2 months: familiarization with ray-tracing using RAYNOISE; DKUT, Prof. Ngetha, at M27 for 3 month: learn measurement of ABL conditions; WUR, Ass. Prof. Smits, at M33 for 2 months: assessment human factors and public acceptance of VAWT in urban environment based on acoustic propagation result.
Announcement: https://euraxess.ec.europa.eu/jobs/433104 (closed)
ESR 3: Fast turn-around methods for wind turbine noise assessment
Objectives: ESR3 will research enhanced fast turn-around trailing-edge noise prediction methods for HAWTs in non-uniform incoming flows; he/she will integrate this approach into full-scale WT noise prediction methods based on an enhanced physical description of the sound generation mechanism and couple it to optimization procedures.
Expected Results: New fast turn-around noise prediction model accounting for azimuthal non-uniformities; coupling with optimization platform; results of the optimization applied to the Task 5.1 large HAWT and Task 5.2 wind farm.
Planned secondments: SGRE, Dr. Oerlemans, at M15 for 1 month: familiarization with the HAWT model; UdeS, Prof. Moreau, at M21 for 2 months: hands-on training on TE noise prediction methods; IVKDF, Prof. Schram, at M27 for 3 months: validation TE noise models by small-scale lab experiments; NTUA, Prof. Giannakoglou, at M33 for 2 months: coupling with optimization tools.
Announcement: https://euraxess.ec.europa.eu/jobs/429764 (closed)
Information about the research group and facilities:
2019 - Master's degree from the University of São Paulo, Brazil
2017 – bachelor’s degree in Aeronautical Engineering from the Pontifical Bolivarian University, Colombia
Laura has experience in numerical and experimental aerodynamics and aeroacoustics. She worked for three years as a graduate researcher in the FINEP INOVA AERODEFESA 04/2013: advanced configuration for noise reduction and FUSP: nose landing gear aeroacoustics projects, which were developed in partnership between the university of São Paulo and Embraer and BOEING, respectively.
Contact Laura Botero
ESR 4: Efficient CFD methods for the simulation of WT fluid-structure interaction
Objectives: ESR4 will study and develop finite volume methods as well as innovative particle methods for the numerical analysis of WT fluid-structure interactions; the latter are known to be advantageous in convection dominated flows; the objective is to accelerate the computations while preserving accuracy in order to enable optimization.
Expected Results: Novel methods for the prediction of fluid/structure interaction, particularly adapted to convection dominated flows as those appearing in WTs analysis; coupling with optimizer; application to the Task 5.1 large WT.
Planned secondments:SGRE, Dr. Oerlemans, at M15 for 1 month: familiarization with the HAWT model; SAMTECH, Dr. D’Ambrosio, at M19 for 3 months: hands-on training with SAMCEF structural solver; NTUA, Prof. Giannakoglou, at M33 for 2 months: coupling with optimization tools.
ESR 5: Adjoint-based aerodynamic and aeroacoustic shape optimization of roof- and ground-mounted HAWTs in the built-environment
Objectives: ESR5 will perform shape-optimization of the rotors of ~5kW HAWTs, roof- or ground-mounted, installed in an urban environment; optimization based on mesoscale simulations (ESR1) conducted using adjoint methods; noise modeling based on hybrid approaches (ESR3); wind data and roughness uncertainties with Stochastic Collocation UQ method.
Expected Results: Adjoint formulations of the mesoscale simulations and noise models; optimization of an urban wind turbine in Task 5.3; UQ analysis of the effect of uncertain wind data and roughness.
Planned secondments:UTW, Prof. De Santana, at M15 for 1 month: familiarization with aeroacoustic formulations and start collaboration with ESR3; SISW, Dr. Le Bras, at M21 for 2 month: familiarization with SISW numerical acoustics solvers; IMP-PAN, Prof. Flaszinsky, at M33 for 3 months: assessment applicability noise control technologies; VAL, Dr. Henner, at M39 for 1 month: comparison optimization practices with those in place at VAL
ESR 6: Improvement of model for vortex generator on wind turbine blade
Objectives: ESR6 will develop a model for RVGs on a WT blade, carry out sensitivity study and provide guidelines for its application to various WT geometries; the 3D effect of RVGs on the performance and possible noise regeneration will be studied using 3D CFD simulations; evaluate the applicability and potential benefits of RVGs for automotive applications.
Expected Results: 3D CFD simulation procedure to quantify the performance improvement of RVGs; sensitivity analysis and guideline for HAWT and VAWT configurations of Tasks 5.1 and 5.3.
Planned secondments:UPM, Prof. Valero, at M15 for 2 months: familiarization with high-order 3D LES solver and methodology; NTU, Prof. Ianiakiev, at M21 for 1 month: familiarization with benchmark urban environment geometry and available data; TUD, Dr. Ragni, at M28 for 2 months: prediction noise generated by RVG; VAL, Dr. Henner, at M33 for 1 month: evaluate applicability flow control strategies on low-speed automotive cooling fans.
ESR 7: Small VAWTs and HAWTs wind turbines (WT) for municipal, low noise applications
Objectives: ESR7 will investigate the relation between noise generation and energy production in the WT laboratory at IMP-PAN; correlation between simulation and experiments; assessment of flow control methods for noise reduction; study of the application of new materials to minimise the rotor deformation and the effect of interaction with stator guiding plates.
Expected Results: Correlation analysis between power output and noise emissions; evaluation of noise reduction strategy based on flow control; investigation new materials for enhance structural safety; application to the Task 5.3 urban benchmark.
Planned secondments:SGRE, Dr. Oerlemans, at M15 for 1 month: familiarization with the HAWT model; NTU, Prof. Ianiakiev, at M21 for 1 month: familiarization with benchmark urban environment geometry and available data; IVKDF, Prof. Schram, at M27 for 1 months: familiarization with aeroacoustic theory and prediction methods; ENE, Mr. Vidaic, at M33 for 2 months: application results to small wind turbine model.
ESR 8: Low-order aeroacoustic simulation methods for WT noise
Objectives: ESR8 will couple low-order semi-analytical aeroacoustic models with their CFD and numerical acoustics platform (input flow data for the acoustic prediction will be based on RANS data); quantification of the accuracy that can be achieved at low numerical costs; nesting full procedure in optimization loop using ABL simulations of WP1
Expected Results: Integrated aeroacoustic simulation platform; quantification of the accuracy and robustness of the results applied to the Task 5.1 large HAWT.
Planned secondments: SGRE, Dr. Oerlemans, at M15 for 1 month: familiarization with the HAWT model; IVKDF, Dr. Christophe, at M21 for 3 month: familiarization with the IVKDF in-house code BATMAN (Broadband and Tonal Models for Airfoil Noise).
ESR 9: Aerodynamic loads of very large WTs
Objectives:ESR9 will apply the panel method to compute the aerodynamics loads of a 3D blade geometry considering the iteration between all blades even for the wave expansion; he/she will investigate whether such methods can be developed and used at industrial scale for very large WTs; aerodynamic loads obtained from ABL simulations of WP1.
Expected Results:Development of a panel method for the determination of unsteady aerodynamic loads accounting for full 3D effects; application of the developed methodology to the large HAWT of Task 5.1.
Planned secondments:SGRE, Dr. Oerlemans, at M15 for 1 month: familiarization with the HAWT model; TUD, Dr. Ragni, at M27 for 1 months: training with LBM solver PowerFLOW; UNL, Prof. Cardona, at M39 for 3 months: application structural dynamics methods to HAWT model using UNL cluster.
ESR 10: Technological and human factors affecting urban wind energy acceptance
Objectives:ESR10 will develop a comprehensive interdisciplinary approach to urban WT engagement that goes beyond conventional ideas about acceptance/non-acceptance of wind turbines. This effort contributes to an anticipatory governance approach to urban wind turbines that helps stakeholders decide on how and where to develop urban wind projects.
Expected Results:Novel multidisciplinary approach of public acceptance of urban wind energy projects, based on noise (psycho-acoustic indicators) and other human factors; application to the Task 5.3 urban environment.
Planned secondments:IVKDF, Prof. Schram, at M15 for 1 month: familiarization with aeroacoustic theory and prediction methods; NTU, Prof. Ianiakiev, at M21 for 2 month: familiarization with benchmark urban environment geometry and available data; ENE, Mr. Vidaic, at M33 for 2 months: application analysis procedure to small wind turbine model
ESR 11: Combined structural and aerodynamic optimization of wind turbine blades
Objectives:ESR11 will create a modelling tool for the automatic optimization of HAWT blades aiming at maximizing the Cl/Cd performance, usually obtained from slender and highly cambered geometries, with thicker blades than usual in order to drastically reduce the wind turbine manufacturing costs.
Expected Results:Automatic procedure for the optimization of the Task 5.1 HAWT; quantification of the benefits in terms of power output, manufacturing costs and resulting amortization period.
Planned secondments:SGRE, Dr. Oerlemans, at M15 for 1 month: familiarization with the HAWT model ; SAMTECH, Dr. D’Ambrosio, at M19 for 2 months: hands-on training with SAMCEF structural solver; UNL, Prof. Cardona, at M27 for 3 months: application structural dynamics methods to HAWT model using UNL cluster; ENE, Mr. Vidaic, at M33 for 2 months: application results to small wind turbine model.
ESR 12: High order methods for generation and propagation of acoustics of wind turbines in urban environments
Objectives:ESR12 will investigate advanced numerical methods based on high order discontinuous Galerkin techniques for generation and propagation of acoustics using LES techniques for wind turbines in urban environments with and without noise mitigation techniques; the numerical results will be compared to experimental data for cross-validation.
Expected Results:High-order and efficient solvers for the simulation of noise production and propagation; application to Task 5.3 benchmark and validation with laboratory experiments; assessment of noise mitigation techniques.
Planned secondments:UTW, Prof. De Santana, at M15 for 1 month: familiarization with aeroacoustic formulations; CSTB, Dr. Maillard, at M21 for 2 month: application to CSTB urban noise prediction; SGRE, Dr. Oerlemans, at M27 for 2 months: familiarization with noise control using TE serrations.
Announcement: https://euraxess.ec.europa.eu/jobs/448735 (closed)
ESR 13: Generation of spectral representations of urban wind fields from LES and experimental databases for aeroelastic simulations of wind turbines
Objectives:ESR13 will first identify appropriate LES and experimental databases of urban wind fields, and then implement a stochastic process analysis aimed at identifying representative mean wind velocity field patterns and representative cross-power spectral density functions. The results will permit the numerical generation of urban synthetic wind velocity fields.
Expected Results:Urban synthetic wind velocity fields obtained from the identified statistical characteristics, to be compared with ABL simulations obtained in WP1; aeroelastic simulations of wind turbines in urban environment (Task 5.3).
Planned secondments:SAMTECH, Dr. D’Ambrosio, at M15 for 2 months: hands-on training with SAMCEF structural solver; ENE, Mr. Vidaic, at M21 for 1 month: analysis Big Data collected by network of installed instrumented urban WTs; DKUT, Prof. Ngetha, at M27 for 2 month: learn measurement of ABL conditions; UNL, Prof. Cardona, at M33 for 2 months: application structural dynamics methods to WT model using UNL cluster.
Announcement: https://euraxess.ec.europa.eu/jobs/448735 (closed)
ESR 14: Effect of inflow conditions on the source noise of large onshore turbines and urban WTs
Objectives:ESR14 will investigate TI noise by means of CAA (PowerFlow), analytical theory, and acoustic/aerodynamic wind tunnel experiments with variation of inflow turbulence characteristics, airfoil shape, etc., trying to mimic full-scale WT conditions; exploration of promising TI noise mitigation strategies (LE serrations); prediction soundscape with ray-tracing.
Expected Results:TI noise models for WTs in rural and urban turbulent ABLs and contribution to human factors derived by ESR10; guidelines towards effective TI noise mitigation; applications to the Task 5.2 and 5.3 benchmarks.
Planned secondments:UTW, Prof. De Santana, at M15 for 1 month: familiarization with aeroacoustic formulations; NTU, Prof. Ianiakiev, at M21 for 2 month: familiarization with benchmark urban environment geometry and available data; CSTB, Dr. Maillard, at M33 for 2 months: calculation soundscape, based on CAA results, using ray-tracing method.
ESR 15: Effect of inflow conditions on the source noise of large onshore turbines
Objectives:ESR15 (previously ESR14 at UD) will apply his/her TI noise model to a full-scale WT, proprietary geometry of SGRE; investigation of the relevance of TI noise based on WP1 results, existing full-scale experimental data and new field measurements; assessment noise mitigation technologies in terms of acoustic/aerodynamic benefits, implementation, and cost.
Expected Results:Application new TI noise prediction method to full-scale WT, proprietary geometry of SGRE.
Planned secondments:IVKDF, Dr. Schram, at M37 for 1 months: familiarization with the ABL simulation dataset.
ESR 16: Harvesting wind energy in complex urban environments
Objectives:: ESR16 establish better means of arranging a cluster of vertical axis wind turbines (VAWT) in the urban environment (i.e. urban rooftops) and integrating them into the existing structures, based on commercial CFD simulations (Ansys Fluent); application to Task 5.3 urban canopy and to a case study corresponding to the City of Nottingham, UK.
Expected Results:Novel methodology for the integration of VAWTS in an urban environment; application to Task 5.3 benchmark and City of Nottingham and assessment public acceptance based on human factors derived by ESR10.
Planned secondments:WUR, Ass. Prof. Smits, at M15 for 2 months: familiarization with human factors and public acceptance of proposed VAWT arrangement in City of Nottingham; ENE, Mr. Vidaic, at M27 for 2 months: assessment suitability of small wind turbine model for City of Nottingham environment; IMP-PAN, Prof. Flaszinsky, at M33 for 1 month: assessment potential benefits of noise control technologies to enhance public acceptance.
ESR 17: Harvesting wind energy in complex urban environments
Objectives:: : ESR17 will study the coupling of near field source models with far field propagation models adapted to complex environments such as urban scenes and designed to evaluate the combined effects of wind and temperature on the generation and propagation of wind turbine noise. The proposed coupling will then be used to generate acoustical signatures of turbine noise at receiver positions.
Expected Results:Far field propagation model for the prediction and auralisation of wind turbine noise based on near field source model. Integration in an existing soundscape ray tracing software and generation of audio samples for the evaluation of psycho-acoustic indicators.
Planned secondments:WUR, Ass. Prof. Smits, at M33 for 2 months: calculation psycho-acoustic indicators from auralisation results.