Doctoral student in fluid mechanics/acoustics - boundary layer/cavity - Hiring in process/Finished, not possible to apply

Project description

Third-cycle subject: Energy Technology

Modern high performance aircraft engines have highly loaded components, both mechanically and aerodynamically. The motors are so optimized that aeroelastic problems not only arise in blades and guide vanes, but also need to be considered in other parts that typically interact with the motor's guide vanes, such as bleeding systems and rotor cavities. It is of the utmost importance to minimize the risk of instantaneous loads on, for example, the low-pressure compressor to avoid fatigue or catastrophic failure. Cavities such as bleed systems or between rotating and stationary parts are prone to acoustic resonance driven by aerodynamics. In addition to aerodynamic requirements, bleeding systems also have requirements not to cause strong transient loads on the compressor due to acoustic resonance. In order to minimize the risk of resonance in the bleed system analysis/design methods that support validation data are needed, which is the purpose to produce within the proposed project. The overall goal is to systematically quantify the coupled resonance that arises between shear layer instabilities in the passing boundary layer and the acoustic cavity. This is through wind tunnel experiments used to validate internal calculation codes in the industry to improve the predictability of these phenomena.

The turbomachinery cluster at the Department of Energy Technology, which this project falls under, is a well-established research group with many years of experience from both EU projects, national program research and commissioned research in collaboration with Swedish and international industry and/or academia. The applied research often involves some experimental rig in the department, as in this project. This research project is part of the Swedish National Aviation Research Program (NFFP7) with funding from Vinnova. Reporting is made to partner company, and further to NFFP7 (Vinnova).

What we offer

• The possibility to study in a dynamic and international research environment in collaboration with industries and prominent universities from all over the world.
• A compulsory individual study plan to support your development in your area of ​​interest.
• A workplace with many employee benefits and monthly salary according to KTH’s Doctoral student salary agreement.
• A postgraduate education at an institution that is active and supportive in matters pertaining to working conditions, gender equality and diversity as well as study environment.
• Work and study in Stockholm, one of Europe’s fastest growing capitals, which is close to both nature and the sea.
• Help to relocate and be settled in Sweden and at KTH.

Eligibility

To be admitted to postgraduate education (Chapter 7, 39 § Swedish Higher Education Ordinance), the applicant must have basic eligibility in accordance with either of the following:

• passed a degree at advanced level,
• completed course requirements of at least 240 higher education credits, of which at least 60 higher education credits at advanced level, or
• in any other way acquired within or outside the country acquired essentially equivalent knowledge.

The applicant must have completed coursework in fluid mechanics.

Selection

In order to succeed as an doctoral student at KTH you need to be goal oriented and persevering in your work. In the selection of the applicants, the following will be assessed:

• ability to independently pursue his or hers work,
• ability to collaborate with others,
• have a professional approach and
• analyse and work with complex issues

Experience from the turbomachinery field and/or experimental investigations are merits.

Experience/courses in acoustics are of merit.

After the qualification requirements, great emphasis will be placed on personal qualities and personal suitability.

Target degree: Doctoral Degree

Information regarding admission and employment

Only those who are or have been admitted to third-cycle studies may be employed as a doctoral student. The term of the initial contract may not exceed one year and may there after be extended. Doctoral students may engage in teaching, research, and administration corresponding to a maximum of 20 % of a full-time position.

Union representatives

You will find contact information for union representatives on KTH's website.

Doctoral section (Students’ union on KTH Royal Institute of Technology)

You will find contact information for doctoral section on the section's website.

Application

Apply for the position and admission through KTH's recruitment system. It is the applicant’s responsibility to ensure that the application is complete in accordance with the instructions in the advertisement.

Applications must be received at the last closing date at midnight, CET/CEST (Central European Time/entral European Summer Time).

Applications must include the following elements:

• CV including your relevant professional experience and knowledge.
• Application letter with a brief description of why you want to pursue research studies, about what your academic interests are and how they relate to your previous studies and future goals. (Maximum 2 pages long)
• Copy of the degree certificate(s) and transcripts of records from your previously attended university-level institutions. Translations into English or Swedish if the original documents are not issued in one of these languages.
• Representative publications or technical reports. For longer documents, please provide a summary (abstract) and a web link to the full text.

Other information

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For information about processing of personal data in the recruitment process please read here.

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Disclaimer: In case of discrepancy between the Swedish original and the English translation of the job announcement, the Swedish version takes precedence.