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Stillingstittel:
PhD in stability analysis of thermo-fluid systems (IV-139/19)

Stillingsbeskrivelse:

Jobbnorge ID: 167996

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We are looking for dedicated employees to join us.

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About the position

A PhD position is available at the Department of Energy and Process Engineering in the Thermo Fluids Group.

The research project is collaborative: the PhD candidate will be supervised by Associate Professor Jonas Moeck, NTNU, and co-supervised by Dr. Luca Magri, University of Cambridge.

Tentative starting date is August/September 2019.

The position reports to Associate Professor Jonas Moeck.

Job abstractJV_description

Many technical thermo-fluid systems are crucially affected by unstable dynamics. In some cases this is desirable but most often it is not. A prominent example that the Thermo Fluids Group at NTNU has built up particular expertise in is the occurrence of combustion instabilities in gas turbines, rocket engines and other devices for power generation and propulsion. This unsteady phenomenon involves thermoacoustic oscillations resulting from resonant coupling of coherent flow structures, combustion, and acoustic modes. On a more abstract level, the strong dynamics observed are a manifestation of the instability of the stationary operating state. This instability can be analyzed based on the eigenstructure of a linear operator that characterizes the dynamics of tiny perturbations from the base state. Such analysis informs about stability, frequency and spatial structure of any free oscillations, and is crucial in ensuring safe and efficient operation of the system.

The present PhD project will focus on novel aspects of stability properties of thermo-fluid systems, with particular focus on thermoacoustic problems. The work will be mainly of theoretical and numerical nature, addressing (i) exceptional points in thermo-fluid systems, which are operating points with infinite sensitivity, their relation to symmetry properties, and universal rules for occurrence; and (ii) spectral structure of thermoacoustic systems with particular focus on high-frequency dynamics, large time delays, staged heat release, and weakly coupled component systems. Depending on the candidate's aptitude, the research work may include experiments in fundamental thermoacoustic configurations.

Qualification requirements

The PhD-position's main objective is to qualify for work in research positions. The qualification requirement is completion of a master's degree or second degree (equivalent to 120 credits) with a strong academic background in engineering, physics or applied mathematics or equivalent education with a grade of B or better in terms of NTNU's grading scale. Applicants with no letter grades from previous studies must have an equally good academic foundation. Applicants who are unable to meet these criteria may be considered only if they can document that they are particularly suitable candidates for education leading to a PhD degree.

The appointment is to be made in accordance with the regulations in force concerning State Employees and Civil Servants and national guidelines for appointment as PhD, postdoctor and research assistant

Other qualifications

• Strong expertise in at least two of the following fields: fluid dynamics, acoustics, combustion, numerical methods.
• Excellent command of the English language in oral and written form.
• Advanced knowledge of Matlab and/or Python.
• Experience in stability analysis of fluid systems.

Personal characteristics

• Enthusiastic and motivated.
• Able to work in a structured and goal-oriented manner.
• Able to work efficiently both independently and in a team.

In the evaluation of which candidate is best qualified, emphasis will be placed on education, experience and personal suitability, as well as motivation, in terms of the qualification requirements specified in the advertisement

We offer

• exciting and stimulating tasks in a strong international academic environment
• an open and inclusive work environment with dedicated colleagues
• favourable terms in the Norwegian Public Service Pension Fund
• employee benefits

Salary and conditions

PhD candidates are remunerated in code 1017, and are normally remunerated at gross from NOK 449 400 before tax per year. From the salary, 2 % is deducted as a contribution to the Norwegian Public Service Pension Fund.

The period of employment is 3 years (without required duties). Appointment to a PhD position requires admission to the PhD programme in Engineering, https://www.ntnu.edu/studies/phiv.

As a PhD candidate, you undertake to participate in an organized PhD programme during the employment period. A condition of appointment is that you are in fact qualified for admission to the PhD programme within three months.

Appointment takes place on the terms that apply to State employees at any time, and after the appointment you must assume that there may be changes in the area of work.

General information

A good work environment is characterized by diversity. We encourage qualified candidates to apply, regardless of their gender, functional capacity or cultural background. Under the Freedom of Information Act (offentleglova), information about the applicant may be made public even if the applicant has requested not to have their name entered on the list of applicants.

Questions about the position can be directed to Jonas Moeck, jonas.moeck (at) ntnu.no.

About the application:

Please submit your application electronically via jobbnorge.no with your CV, diplomas and certificates. Applicants invited for interview must include certified copies of transcripts and reference letters. Please refer to the application number IV-139/19 when applying.

In addition to the required fields on the Jobbnorge website, please include a "Qualifications" document in which you detail how you meet the required and desired qualifications listed above (max one page). An application missing this document may be considered incomplete by the selection committee.

Application deadline: 19.04.19

Se annonsen og søk på stillingen www.jobbnorge.no

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jobCategoriesCodes_0: http://data.europa.eu/esco/isco/C2149

abstractJV_contact_0: See jobabstractJV_description

contractTypeCodes_0: fulltime

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