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stillingsbetegnelse:
PhD scholarship in 3D Shape and Aero-elastic Optimization of Wind Turbine Rotors

jobbeskrivelse:

The AER section focuses on aerodynamic and aeroacoustic research based on modelling and experimental techniques. The research in the AER deals with fidelities ranging from engineering models to vortex-based and CFD models, facilitating FSI methods and multidisciplinary design. The tools and knowledge are applied in interaction with the industry in the design process for solving problems or implementing new concepts. Aerodynamic add-ons and surface roughness have become important aspects as well. Further, the Poul la Cour Wind Tunnel, the Research Turbine, and the Rotating Test Rig are offering a tremendous boost in our capabilities to increase the impact of our research.

Traditionally, preliminary wind turbine rotor design is decoupled into airfoil optimization using panel methods or 2D CFD and rotor design using BEM-based aeroelastic tools, then structural design using beam and cross-section based structural models. In BEM methods, the airfoil characteristics are based on lookup tables, and 3D flow effects are captured with models, which is well-known to not capture the true three-dimensional characteristics of the flow near the root and tip. A BEM based approach is further challenged for advanced designs that incorporate in-plane and out-of-plane geometric variation, due to inadequate or simplified modelling approaches. Finally, such simple structural models do not account for buckling, nor accurately captures bend-twist coupling.

In response to this challenge, DTU Wind Energy is looking for a PhD candidate to continue the development of an in-house aero structural shape optimization framework currently under development. This framework allows us to apply a mix of low and high fidelity tools to design the 3D shape of the blade in one step, taking into account all the 3D flow phenomena and detailed internal structure.

Responsibilities and tasks
DTU Wind Energy is looking for PhD candidates to join the development team. We are primarily looking for a candidate that will focus on the development of high-fidelity and multi-fidelity aerodynamic optimization capabilities. This candidate will work with Ellipsys3D as the high-fidelity model. They will be working with the new ad joint solver (analytic design sensitivities) and numerical optimization methods to further develop the design tool, potentially extending the ad joint solver with transition modelling as well as coupling the CFD code to structural models with analytic design sensitivities. Given the computational demands of CFD, the framework should incorporate multi-fidelity methods to minimize the number of high-fidelity simulations required. To support a multi-fidelity approach, the candidate will also work with other PhD students in the development of an advancedblade element moment model with analytic gradients.

This work will be part of a larger effort that encompasses the design optimization of the full wind turbine. This includes aero-dynamic, structural dynamics, control theory, numerical optimization, surrogate based optimization, uncertainty quantification, multi-disciplinary design optimization and systems engineering. DTU Wind Energy is also looking for exceptional candidates that can make contributions in these other areas. If you have experience and talents in these areas and come with a strong interest in multi-disciplinary wind turbine design optimization, then we would encourage you to submit an application.

Qualifications
For the main position, the candidate should have a strong understanding of wind turbine aerodynamics, design engineering, optimization, CFD and BEM. The candidate should also have a strong background in programming with a focus on the Python, Fortran and C++ languages and skills within:

• Control theory
• Composite structures
• Structural dynamics
• Optimization will also be an asset

Candidates should have a master's degree in engineering or a similar degree with an academic level equivalent to the master's degree in engineering.

Approval and Enrolment
The scholarship for the PhD degree is subject to academic approval, and the candidate will be enrolled in one of the general degree programmes at DTU. For information about our enrolment requirements and the general planning of the PhD study programme, please see the DTU PhD Guide.

We offer
DTU is a leading technical university globally recognized for the excellence of its research, education, innovation and scientific advice. We offer a rewarding and challenging job in an international environment. We strive for academic excellence in an environment characterized by collegial respect and academic freedom tempered by responsibility.

Salary and appointment terms
The appointment will be based on the collective agreement with the Danish Confederation of Professional Associations. The allowance will be agreed upon with the relevant union. The period of employment is 3 years.

Workplace will be DTU RISØ Campus, Frederiksborgvej 399, 4000 Roskilde, Denmark.

You can read more about career paths at DTU here.

Further information
Further information may be obtained from Frederik Zahle, +45 4677 5477 or Michael McWilliam, +45 9351 1566

You can read more about the department at http://www.vindenergi.dtu.dk.

Application
Please submit your online application no later than 8 October 2018 (local time).

Applications must be submitted as one PDF file containing all materials to be given consideration. To apply, please open the link "Apply online", fill out the online application form, and attach all your materials in English in one PDF file. The file must include:

• A letter motivating the application (cover letter)
• Curriculum vitae
• Grade transcripts and BSc/MSc diploma
• Excel sheet with translation of grades to the Danish grading system (see guidelines and Excel spreadsheet here) 

Candidates may apply prior to obtaining their master's degree but cannot begin before having received it.

All interested candidates irrespective of age, gender, race, disability, religion or ethnic background are encouraged to apply.

DTU Wind Energy has more than 240 staff members, including 150 academic staff members and approximately 50 PhD students. DTU Wind Energy has a considerable degree of innovation and cooperation with companies and sector associations within the wind industry in Denmark and abroad. The research is conducted within the three main topics wind energy systems, wind turbine technology, and basics for wind energy. DTU Wind Energy is one of the largest and most prominent research institutions within wind energy. Website: http://www.vindenergi.dtu.dk.

DTU is a technical university providing internationally leading research, education, innovation and scientific advice. Our staff of 6,000 advance science and technology to create innovative solutions that meet the demands of society, and our 11,200 students are being educated to address the technological challenges of the future. DTU is an independent academic university collaborating globally with business, industry, government and public agencies.

DTU is a technical university providing internationally leading research, education, innovation and scientific advice. Our staff of 6,000 advance science and technology to create innovative solutions that meet the demands of society, and our 11,200 students are being educated to address the technological challenges of the future. DTU is an independent academic university collaborating globally with business, industry, government and public agencies.

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jobCategoriesCodes_0: http://data.europa.eu/esco/isco/C2310

abstractJV_contact_0: Please apply using one of the specified channels

positionTypeCode: directhire

contractTypeCodes_0: fulltime

Arbejdsgiver Navn: Danmarks Tekniske Universitet

source: DK-STAR