The Department of Energy and Process Engineering has a vacancy for a
Postdoctoral position in combustion instabilities
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About the position
A post-doctoral researcher position is available at the Department of Energy
and Process Engineering (EPT), in the Thermofluids research group.
The appointment has a duration of 2-4 years dependent on funding and is
financed by the Norwegian Research Council as part of the FRIPRO Programme.
It is well known that low emission combustion concepts for aeroengines and gas
turbines for power generation are prone to combustion instabilities. These
instabilities cause large amplitude pressure oscillations that can drastically
reduce the operable range or compromise the structural integrity of gas
turbines, and therefore must be avoided. The current research project is aimed
at improving our fundamental understanding of the combustion dynamics which
occur during instabilities in laboratory scale combustors. In particular the
project will focus on the effect of dramatic changes to important length and
time scales in the flow when using low emission hydrogen fuel blends.
The position will involve conducting a series of laboratory experiments using
state-of-the-art diagnostics such as high-speed chemiluminescence, and
acoustic measurements using dynamic pressure sensors to measure the response
of acoustically forced flames. Azimuthal forcing will be used to create well
controlled velocity oscillations, and the corresponding formation of large-
scale vortex and flame structures. The aim of these measurements will be to
characterise the dynamics of the coherent structures with reference to the
acoustic excitation, across a wide range of flow conditions. Simple low order
vortex models will also be used to simulate the dynamics of the dominant flow
and flame structures. Models will also be used to assess the stability of the
azimuthal modes. These measurements and models will help improve our
understanding of the flame structure and dynamic response during
thermoacoustic instability, with the ultimate aim of helping to reduce gas
The position reports to Associate Professor Nicholas Worth.
Duties of the position
Design, setup, and optimisation of experiments, including accurate
characterisation of boundary conditions.
Application of azimuthal acoustic forcing to control the amplitude, phase
and nature of modes inside an annular combustion chamber.
Measurement of heat release rate response using high speed
Development of simple vortex models to create dominant dynamics.
Application of low order models to predict the stability of azimuthal
Dissemination of results in scholarly journals and at international
Required selection criteria
The successful applicant should be enthusiastic and highly motivated as well
as being able to work effectively by themselves and in a team. Specific
qualifications are listed below:
A PhD in engineering, applied mathematics, physics or equivalent
Strong background in fundamental or applied fluid mechanics.
Previous peer-reviewed publications in well regarded journals.
Programming skills in MATLAB, C, Python, or similar packages.
Experience with state-of-the-art experimental fluid mechanics measurements
(e.g., high-speed imaging, PLIF, dynamic pressure measurements, hot-wire,
particle image velocimetry, laser-Doppler anemometry).
Excellent written and oral English language skills
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, post doctor and research assistant
Preferred selection criteria
Experience with Computer Aided Design (CAD)
Experience conducting acoustically forced measurements of reacting flows,
with a preference for experience of azimuthal forcing.
Experience modelling azimuthal instabilities in annular geometry.
Experience with LaVision hardware and DaVis software.
Experience mentoring other PhD or Masters students.
exciting and stimulating tasks in a strong international academic
an open and inclusive work environment with dedicated colleagues
favourable terms in the Norwegian Public Service Pension Fund
Salary and conditions
As a Postdoctoral Fellow (code 1352) you are normally paid from gross NOK
545 300 per annum before tax, depending on qualifications and seniority. From
the salary, 2% is deducted as a contribution to the Norwegian Public Service
The period of employment is 2-4 years, to be determined based on funding at
The engagement is to be made in accordance with the regulations in force
concerning State Employees and Civil Servants, and the acts relating to
Control of the Export of Strategic Goods, Services and Technology. Candidates
who by assessment of the application and attachment are seen to conflict with
the criteria in the latter law will be prohibited from recruitment to NTNU.
After the appointment you must assume that there may be changes in the area of
The position is subject to external funding.
It is a prerequisite you can be present at and accessible to the institution
on a daily basis.
About the application
The application and supporting documentation to be used as the basis for the
assessment must be in English.
Publications and other scientific work must follow the application. Please
note that applications are only evaluated based on the information available
on the application deadline. You should ensure that your application shows
clearly how your skills and experience meet the criteria which are set out
If, for any reason, you have taken a career break or have had an atypical
career and wish to disclose this in your application, the selection committee
will take this into account, recognizing that the quantity of your research
may be reduced as a result.
The application must include:
CV, certificates and diplomas
Transcripts and diplomas for bachelor's-, master's- and PhD degrees.
Academic works - published or unpublished - that you would like to be
considered in the assessment
Name and address of two referees
If all, or parts, of your education has been taken abroad, we also ask you to
attach documentation of the scope and quality of your entire education.
Description of the documentation required can be found here. If you already
have a statement from NOKUT, please attach this as well.
Joint works will be considered. If it is difficult to identify your
contribution to joint works, you must attach a brief description of your
In the evaluation of which candidate is best qualified, emphasis will be
placed on education, experience and personal and interpersonal qualities.
Motivation, ambitions, and potential will also count in the assessment of the
NTNU is committed to following evaluation criteria for research quality
according to The San Francisco Declaration on Research Assessment - DORA.
Working at NTNU
A good work environment is characterized by diversity. We encourage qualified
candidates to apply, regardless of their gender, functional capacity or
The city of Trondheim is a modern European city with a rich cultural scene.
Trondheim is the innovation capital of Norway with a population of 200,000.
The Norwegian welfare state, including healthcare, schools, kindergartens and
overall equality, is probably the best of its kind in the world. Professional
subsidized day-care for children is easily available. Furthermore, Trondheim
offers great opportunities for education (including international schools)
and possibilities to enjoy nature, culture and family life and has low crime
rates and clean air quality.
As an employee at NTNU, you must at all times adhere to the changes that the
development in the subject entails and the organizational changes that are
Information Act (Offentleglova), your name, age, position and municipality
may be made public even if you have requested not to have your name entered on
the list of applicants.
Questions about the position can be directed to Associate Professor Nicholas
Worth (email@example.com) or Associate Professor Jonas Moeck
Please submit your application electronically via jobbnorge.no with your CV,
diplomas and certificates. Applications submitted elsewhere will not be
considered. Diploma Supplement is required to attach for European Master
Diplomas outside Norway. Chinese applicants are required to provide
confirmation of Master Diploma from China Credentials Verification (CHSI).
If you are invited for interview you must include certified copies of
transcripts and reference letters. Please refer to the application number
IV-176/21 when applying.
Application deadline: 23.06.2021.
NTNU - knowledge for a better wo rld
The Norwegian University of Science and Technology (NTNU) creates knowledge
for a better world and solutions that can change everyday life.
Department of Energy and Process Engineering
We conduct research and teaching covering the entire energy chain, from
resources to the end-user. We look at how energy is produced and used by
humans and machines in a sustainable way with regard to health, climate change
and the resource base. The Department of Energy and Process Engineering is one
of eight departments in the Faculty of Engineering.
23rd June 2021
NTNU - Norwegian University of Science and Technology
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