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MSc. Thesis: Turbulence model development for additively manufactured surfaces

Finspang, Sweden
Research & Development

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English (UK)

Job Description

Join us on our journey into the future #FutureMakers#Siemens

Siemens Industrial Turbomachinery in Finspång is now seeking for a M.Sc. student for a 6 months M.Sc. thesis in additive manufacturing group

Siemens is a global powerhouse in electronics and electrical engineering, actively operating in more than 200 countries. We’re offering a wide range of pioneering products for energy efficiency, industrial productivity, affordable healthcare and intelligent infrastructure, with a quickly growing focus on sustainability. Siemens has been in existence in Sweden since 1893 and we currently have 4,500 employees in over 40 locations and are constantly looking for curious and open colleagues.

Components in modern gas turbines may experience temperatures up to 2000K at rotational velocities around 2000km/h. Since no suitable materials can withstand such loads, much effort is put into the development of efficient cooling methods and these may be the difference between engine failure and success.

The introduction of additive manufacturing or particularly selective laser melting (SLM) has given cooling design new possibilities. SLM is an AM technique that is designed to melt and fuse metallic powder by means of a high power density laser beam.

Computational fluid dynamics (CFD) has been used extensively to analyze the turbine components in order to estimate the cooling consumption and heat transfer effectiveness as well as pressure drop. These parameters have direct impact on the performance of a gas turbine.

The manufactured components with SLM method have a higher surface roughness compared to the components that are traditionally manufactured. It is known that surface roughness increases the convective heat transfer coefficients however at the same time increases the pressure drop as well. Therefore there is demand for new turbulence models that are capable to correctly predict the skin friction and convective heat transfer in additively manufactured surfaces.

What does the M.Sc. Thesis entail?

The scope of the present M.Sc. Thesis is to develop new SST k-ω turbulence model that is capable of predicting the pressure losses in additively manufactured surfaces more accurately. The development of the new turbulence model will be based on the measurements that are carried out in the Siemens fluid dynamic laboratory.

The challenge

A good knowledge of CFD, turbulence modelling, fluid mechanics, programming and Matlab is essential to be able to carry out this study successfully. The numerical simulations will be performed by an in-house code developed by Prof. Lars Davidson at Chalmers University.

What else do I need to know?

The work will start in the winter of 2019. A rough plan of this master thesis is as follows:

Estimated time

Task

1 month

Literature study

4 months

CFD simulations

0.5 month

Building correlation

0.5 month

Writing M.Sc. thesis report

What does Siemens offer me?

An hourly wage will be offered for 6 months. If the student prefers to do the work at Siemens in special cases, Siemens offers accommodation to long-distance students during the diploma work.

About Siemens

If you’re excited to shape the innovations of tomorrow, we want to hear from you. You’ll join 372,000 of the smartest minds all working together to build a better future. See more on Siemens.se

Application

Do not hesitate - apply today via siemens.se refnr 76895 and no later than October 31, 2018.  You will be based in Finspång or in Gothenburg, Sweden. Attach your resume and cover letter with your application describing your interest in our business and why you are suitable for this M.Sc. Thesis. We are looking forward to your application.

For questions about the role please contact Dr. Darioush Gohari (darioush.gohari-barhaghi@siemens.com), tel. +46 (0)122 82138 or Professor Lars Davidson (lada@chalmers.se) who will be supervising the thesis project.

For questions about the recruitment process contact the responsible recruiter Malin Tallberg, tel, +46 (0)122 81381.

Trade Union representatives:
Christine Lindström, Unionen, 0122-817 28
Simon Bruneflod, Sveriges Ingenjörer, 0122-842 24
Jan Lundgren, Ledarna, 0122-812 33
Kenth Gustavsson, IF Metall, 0122-815 25

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In this recruitment we renounce all calls relating to advertising and recruitment support.



Job ID: 76895

Organisation: Power and Gas

Experience Level: Student (Not Yet Graduated)

Job Type: Full-time





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