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Early Stage Researcher (ESR) – PhD position (m/f/d) (salary according to German TV-L E13, 100%)
starting between April 2020 (preferably) and October 2020 (the latest) for a period of three years.
The position is part of the EU Horizon 2020 MSCA Innovative Training Network (ITN) project FLOAting Wind Energy netwoRk, FLOAWER. Within this network project a total of 13 ESR positions are open at different institutes in Europe. For more details on the overall objectives and structure of this ITN, see www.floawer-h2020.eu.
The scientific work at the University of Oldenburg (ERS10) focuses on Dynamics and interaction of floating turbines. Floating turbines interact with the incoming wind field as well as with the water waves resulting in additional complex motions of the turbines. These additional motions and their dynamics affect the performance of the turbines itself as well as the generated wakes and their development with increasing distance to the turbine. In wind farms these wakes represent the inflow for turbines located inside the farm and result again in additional dynamics which might lead to higher loads, fatigue loads and therefore higher failure rates and down times. A better understanding of these interactions and dynamics can be used to further develop models and control strategies, respectively.
In this PhD project this problem will be addressed by means of experimental investigations with model turbines, Steward platforms and an active grid in the new big wind tunnel in the WindLab at the University of Oldenburg. The model turbines have a diameter of 0.6m and are equipped with a control system for variable pitch and rotational speed. These wind turbines will be placed on a so-called Steward platform, which allows moving the turbine in 6 degrees of freedom mimicking the motion of a floating turbine. Additionally, an active grid allows generating turbulent inflow conditions showing comparable characteristics of atmospheric flows. With this high-end equipment and velocity measurement techniques like hot-hire, Laser Doppler Anemometry (LDA) and stereo high-speed particle image velocimetry (PIV) the effects on the turbine dynamics and the flow characteristics can be measured. This will be done for a single turbine as well as for two turbines in a tandem configuration. Data will be used to develop a stochastic description of the overall floating wind turbine system.
In the framework of this PhD project two secondments are planned each of 3 months duration - one at Politecnico di Milano and one at GICON.
Prerequisite is a qualifying university degree (diploma or master) in engineering, physics or an equivalent course of studies. Practical expertise in experimental measurement techniques, model turbines, optical measurement techniques like LDA and PIV as well as experience in LabView programming is desired. Experience with stochastic analysis and the programming tools "GNU R" and/or MatLab is of interest.
All interested candidates irrespective of age, gender, race, disability, religion or ethnic background are encouraged to apply. The University of Oldenburg is dedicated to increase the percentage of female employees in the field of science. Therefore, female candidates are strongly encouraged to apply. In accordance to § 21 Section 3 NHG, female candidates with equal qualifications will be preferentially considered. Applicants with disabilities will be given preference in case of equal qualification. Full-time positions can be also turned into part-time ones.
In addition, the successful candidate should satisfy the following mandatory characteristics at the time of the recruitment:
• having not more than 4 years of equivalent research experience (i.e. working as researcher after obtaining your master’s degree);
• having not been awarded a title of PhD before;
• having not resided or carried out her/his main activity in Germany for more than 12 months in the last 3 years
Please apply for ESR10 through the on-line recruitment portal on the FLOAWER website
An on-line application is preferred. If on-line application is not possible, please send all application documents
via mail to:
Carl von Ossietzky University of Oldenburg
Institute of Physics
ForWind - Center for Wind Energy Research
Dr. Michael Hölling
26129 Oldenburg, Germany
Deadline for on-line and postal applications is December 31st 2019.
Primary supervisor: Prof. Jan Helsen
Secondary supervisor: ir. Cédric Peeters
The VUB Acoustics and Vibrations Research group and VUB AI-group work closely together in the field of machine monitoring. Novel signal processing and AI methods are developed specifically targeted at the prediction of failures and accurate assessment of their progression. In this context we work closely together with leading companies: Atlas Copco, BASF, ZF, …
The team has a core focus on wind energy in the context of OWI-lab. There we have ongoing research projects with MHIVOW, ZF Wind Power, Parkwind, … Our multi-disciplinary approach allows us to bring methodological advancements all the way to application in industry.
Full Project Detail
The process of tracking the health of machinery is commonly known as condition monitoring. Typically, it involves recording data, analyzing this data, and then inspecting the resulting indicators for potential significant changes that could be symptomatic of a defect. Incorporating condition monitoring in the Operations and Maintenance of a company opens the door for predictive maintenance. At VUB we can offer help to companies in this condition monitoring process by performing specialized data analysis of their machines. This can be through the use of vibrations, rotation speed, acoustics, or other sources of measurable information. All these measurements typically produce a lot of complex data, therefore we investigate new ways how we effectively and efficiently analyze this data to provide an as accurate as possible health summary of the machine. Next to data analysis, there is thus also a strong focus on big data processing, automation of the result interpretation using machine learning, and keeping up with the Internet of Things trend of increased sensorization and data acquisition.
PhD project description
The research focuses on developing new data analysis tools for condition monitoring of wind turbines and rotating machinery in general. The work will include implementing existing concepts in code, but also developing novel ideas for signal processing. There is a strong emphasis on bearing and gear monitoring. In addition to the development of novel methodologies for signal analysis, we also strive to deliver actionable information, relevant to the industry. Thanks to our strong connections with several industrial partners, we have the opportunity to work on interesting issues, but this means we also need to disseminate our results. Therefore, your work will go beyond the development of new methods and will also include expanding our data analysis platform with your new tools and combining your new tools with state-of-the-art machine learning approaches. The latter is accomplished by our collaboration with the Artificial Intelligence group of VUB.
We offer the opportunity to work in a very inspired, motivated and enjoyable research group that is looking to expand. The focus is also not purely on academic aspects thanks to our industrial collaborations. Therefore, you will inevitably also gain significant industrial experience and insight into how companies function and how to operate together with them. On top of the meaningful academic and industrial experience that you will gain, we encourage every PhD student to go and present their work at international conferences abroad.
Applicants should preferably have:
- Master degree in Mechanical, Electrical, or Mathematical engineering
- A relevant Master’s degree and/or experience in one or more of the following will also be an advantage: wind turbine dynamics, signal processing, machine learning techniques, Bayesian statistics, ...
- Background or interest in programming (Matlab, python, java, C/C++, …)
- Proficiency in English is a plus
We offer an international open working environment stimulating personal development through international courses, many opportunities to attend and present at conferences abroad. Possibility to spend part of the research abroad. A generous competitive salary, public transport coverage and health insurance. The PhD normally lasts 4 years.
Mail to firstname.lastname@example.org ; email@example.com
How to apply
All applications should be made through e-mail (firstname.lastname@example.org)
Promoter: J. Meyers
Contact: Prof. J. Meyers, Department of Mechanical Engineering, Celestijnenlaan 300A, B3001 Leuven, Belgium. T: +32(0)16 322502.
Apply using the KU Leuven online application platform. (Applications by email are not considered!)
This PhD position is part of the FREEWIND project (Development of a Fast REsourcE planning and forecasting platform for the Belgian offshore WIND zones), financed by the Flemish Energy Transition Fund, which aims to encourage and support energy research and development supporting the transition to a carbon-neutral society. The project team consists of nine researchers and supporting staff. Three PhD students will be recruited at the start of the project and work full time for four years (the current position is one of them). A data scientist and ICT engineer, will work part time on the project. The project is closely aligned with another funded project on two-way meso–micro coupling for wind farm optimization and design, carried out by two PhD students at KU Leuven. The project is led by Prof. Johan Meyers (Turbulent Flow Simulation and Optimization (TFSO) research group; department of Mechanical Engineering) and Prof. Nicole van Lipzig (Regional Climate Studies (RCS) research group; department of Earth and Environmental Sciences). Within the TFSO and RCS group there is ample of expertise on the modelling tools needed for the FREEWIND project. The current PhD position will be supervised by Prof. J. Meyers and co-supervised by Prof. N. van Lipzig.
Offshore wind energy plays a central role in Europe’s transition to a carbon-free energy system. In Europe, numerous offshore wind zones surpass 1GW in capacity, several of which are under construction. At these sizes, wind farms interact with the atmospheric boundary layer and the local meso-scale weather system. Only very recently, the importance of these effects for wind-farm operation have been recognized. For instance for the combined Belgian–Dutch offshore cluster, the effect of wind-farm induced gravity-wave systems on the overall Annual Energy Production can be up to 6% (less production), and up to 30% on hourly production. Two-way interaction with other meso-scale systems, such as land–sea breeze or convection cells may also be important, but this has not yet been investigated to date. These effects are not included in current windfarm planning and forecasting tools. The FREEWIND project aims at developing a planning and forecasting platform that includes mesoscale feedback. A central case study will be centered around Belgian’s offshore wind zones. The platform is made available open-source through a dedicated web interface that allows for online scenario analysis.
PHD PROJECT DESCRIPTION
Research: To date, the main engineering paradigm with respect to the wind resource is a one-way approach, in which wind turbines are considered too small to affect the local wind climate. Current engineering tools for wind-farm planning are based on this approach. The development and open availability of fast models that include two-way coupling will be paramount for the efficient development and future exploitation of Europe’s large offshore wind farms. For this reason, KU Leuven developed an atmospheric perturbation model (Allaerts & Meyers, JFM 2019). The PhD will work on extending this model to take into account nonhomogeneous conditions, and baroclinic conditions. Moreover, a dynamical version of the model will be developed. The micro-scale model SP-Wind, a Large-Eddy Simulation code developed at KU Leuven, will be used to obtain highly detailed datasets for the development and validation of the atmospheric perturbation model. To this end, the current version of SP-Wind, will be slightly extended to include shallow boundary layers and effects of baroclinicity in the free atmosphere. The ultimate goal of this PhD is to develop and validate an engineering model for the planning (5 years to 20 years), forecasting (1 day to 7 days) and nowcasting (30 min to 1 day) ranges thereby including two-way coupling on all these timescales.
Timeline and remuneration: Ideal start time is March 1st 2020, but earlier and later starting dates can be negotiated. The PhD position lasts for the duration of four years, and is carried out at the University of Leuven. During this time, the candidate also takes up a limited amount (approx. 10% of the time) of teaching activities. The remuneration is generous and is in line with the standard KU Leuven rates. It consists of a net monthly salary of about 2000 Euro (in case of dependent children or spouse, the amount can be somewhat higher).
Candidates have a master degree in one of the following or related fields: fluid mechanics, aerospace or mathematical engineering, numerical mathematics, or computational physics. They should have a good background or interest in fluid mechanics, simulation, optimization, and programming (Fortran, C/C++, MATLAB, Python, …). Proficiency in English is a requirement. The position adheres to the European policy of balanced ethnicity, age and gender. Both men and women are encouraged to apply.
To apply, use the KU Leuven online application platform (applications by email are not considered) Please include:
a) an academic CV and a PDF of your diplomas and transcript of course work and grades
b) a statement of research interests and career goals, indicating why you are interested in this position
c) a sample of technical writing, e.g. a paper with you as main author, or your bachelor or master thesis
d) two recommendation letters
d) a list of possible additional references (different from recommendation letters): names, phone numbers, and email addresses
e) some proof of proficiency in English (e.g. language test results from TOEFL, IELTS, CAE, or CPE)
Please send your application as soon as possible and before May 31st, 2020 at the latest.
Decision: when a suitable candidate applies.
Starting date: candidates can start immediately. Start preferable Spring 2020.