Study of the flow phenomena potentially impacting the structural response of a Francis runner during start-up sequences
Hydro-electricity, the main renewable energy worldwide so far, represents 60% of the electricity produced in Canada. It is part of the solutions to ensure the quality of life of people and to preserve the environment. In the last 20 years, this energy production has evolved to accommodate market deregulation and the introduction of other intermittent renewable energy sources on the power grid. Hydraulic turbines must therefore be started and stopped much more often than they were intended for and must spend considerable time at off-design conditions where mechanical stresses are significantly higher than at best efficiency point. Those changes exacerbate structural problems leading to production losses and increased maintenance cost.
Major industrial players in the design and operation of large hydraulic turbines (Andritz Hydro, EDF, General Electric, Hydro Québec, Voith Hydro) have united their efforts in a project spearheaded by the Laboratory of Hydraulic Machines (LAMH) from Université Laval in collaboration with Polytechnique Montreal to tackle this problem. The Tr-FRANCIS research project aims at studying fluid-structure interactions during transient and no-load regimes in Francis turbines by combining numerical simulations with experimental measurements on scaled models of a real Francis turbine. This great research endeavour will train 3 postdoctoral researchers, 5 PhD and 10 MSc students between 2017 and 2022 in a stimulating environment.
We are currently looking for a PhD candidate for a project within the framework of Tr-FRANCIS. The main goal is to study how flow phenomena may impact the structural response of a Francis runner during start-up sequences. It will focus on the following specific objectives: 1) identify and characterize the most damaging flow phenomena, from a structural perspective, in start-up conditions, 2) study the specific effect of angular acceleration on the development of flow phenomena inducing runner vibrations, and 3) develop methods of analysis for transient and stochastic regimes related to start-up conditions.
The project is mostly experimental, although the PhD candidate will be involved in planning some numerical and theoretical work. The candidate will develop an experimental campaign to obtain the time-resolved components of the velocity fields within the model turbine usind stereoscopic TR-PIV. The PhD candidate will interact with the other students and researchers of Tr-FRANCIS as well as the industrial partners, and will have the chance to present his-her results. The sought candidate has a master's degree in Mechanical/Aerospatial Engineering and processes a strong background in fluid mechanics. Preferably, she/he has some experience in experimental fluid mechanics. A PhD thesis lasts approximately four years. The candidate should be ready to start the project by September 2018.
- Mechanical Engineering
Université Laval - Faculty of Science and Engineering – Mechanical Engineering – Hydraulic Machines Laboratory (LAMH)
Doctorate in Merchanical Engineering
Financial aid available*
Financial aid related to research project
$25000 per year for 4 years.
Program-Specific Financial Aid
Graduate Studies Awards
|7 x $500
|Doctoral exam or seminar presentation
|Doctoral exam, seminar or conference
|Initial thesis submission
*A $ 500 bonus will be added to the studentship for graduation if the initial deposit is made before the session that precedes the maximum qualifying session.
Université Laval: Student Financial Aid
Supplemental Tuition Fee Exemption Scholarship Program: Entitles international students to pay Canadian student tuition fees, for overall savings of around $30,000.
* Amounts shown represent maximum financial aid available. Certain conditions apply. Subject to change without prior notice. For further information, contact sponsoring organizations directly.
- Mechanical Engineering
Requirements and Conditions
- Statement of purpose letter.
- Resume (CV).
- Transcripts (student records).
- Recent publications (journal paper, thesis, school project report, etc.).
- Cover letter
- Curriculum vitæ
- Student transcript
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Département de génie mécanique