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  3. PhD: Stall-induced vibration and vortex-induced vibration of large-scale wind turbines

PhD: Stall-induced vibration and vortex-induced vibration of large-scale wind turbines

High wind sites are favourable for wind turbines/farms to maximize the power production. However, the maximal allowable wind velocity window for installation …

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Arbeidsvoorwaarden

Standplaats:
Mekelweg, Delft, Zuid-Holland
Dienstverband:
Tijdelijk contract / Tijdelijke opdracht
Uren per week:
38 - 40 uur
Salarisindicatie:
€ 2395 - € 3061 per maand
Opleidingsniveau:
WO

Functieomschrijving

High wind sites are favourable for wind turbines/farms to maximize the power production. However, the maximal allowable wind velocity window for installation lies within 8-12 m/s due to the limitations of the state-of-the-art lifting equipment. This means that in many cases the expensive installation equipment needs to wait for the wind to decrease, which results in huge cost. The typical cost of waiting for a lower wind speed window of a middle-sized European offshore wind farm is estimated around 15 million euros. In wind turbine design, the load case of parked condition at 50-year extreme wind speed with yaw controller failure are often design-driving.

To model a parked wind turbine or a wind turbine during installation demands a full range of angle of attack with a large range of yaw angle. Consequently, the aerodynamics of wind turbines at standstill or during installation is complicated by stall-induced vibration (SIV) and vortex-induced vibration (VIV) phenomena. The state-of-the-art dynamic stall models and yaw models are questionable for these conditions. The Blade Element Momentum (BEM) theory based method are proved inaccurate at these conditions.

The research aims at understanding the flow physics of SIV and VIV of wind turbines at standstill or during installation at the scales of 2D airfoil, 3D blade and rotor in order to improve the current design tool with engineering models for SIV and VIV prediction of large-scale wind turbines. It will mainly employ the aeroelastic measurements at the wind tunnel facilities at TUDelft, while combining analytical modelling and vortex and aeroelastic modelling.

Functie-eisen

The candidate should have an MSc degree in Fluid dynamics from a well-established university, or an MSc degree in related engineering disciplines such as applied physics, applied mathematics, or mechanical engineering with a proven experience (courses, projects, work experience) in the field of fluid dynamics. A combination of good mathematical/analytical skills and a strong interest in experimental aerodynamics is required. Experience with experimental techniques in fluid dynamics is preferred. Proven experience with such experiments and related data processing is advantageous for this position. Since an important part of research work is dissemination and collaboration, fluent communication skills, both written and orally, in English are of utmost importance. Female scientists are particularly encouraged to apply.     

Conditions

TU Delft offers PhD-candidates a 4-year contract, with an official go/no go progress assessment after one year. Salary and benefits are in accordance with the Collective Labour Agreement for Dutch Universities, increasing from € 2395 per month in the first year to € 3061 in the fourth year. As a PhD candidate you will be enrolled in the TU Delft Graduate School. The TU Delft Graduate School provides an inspiring research environment with an excellent team of supervisors, academic staff and a mentor. The Doctoral Education Programme is aimed at developing your transferable, discipline-related and research skills.

The TU Delft offers a customisable compensation package, discounts on health insurance and sport memberships, and a monthly work costs contribution. Flexible work schedules can be arranged. For international applicants we offer the Coming to Delft Service and Partner Career Advice to assist you with your relocation.

Additional information

For more information about this position, please contact Dr. Wei Yu, w.yu@tudelft.nl

EnergyDelft

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