Master Thesis External Heat Transfer

Master Thesis External Heat Transfer
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We are now looking for a student to take on the assignment
Calculation of external heat transfer coefficients for gas turbine components


The assignment:


To determine the thermal state of a turbine component in a gas turbine, typically a vane or a blade, calculation of the external or gas side heat transfer coefficient (hereby noted as HTC) is necessary. Over the years different methods for calculating the external HTCs has been used; from flat plate Nusselt and Stanton correlations and boundary layer codes to state of the art CFD calculations.
Several factors influence the boundary layer around a turbine component airfoil and hence the external HTCs such as turbulence intensity, surface roughness, transition from laminar to turbulent flow, curvature, pressure distribution and Mach number distribution. This makes it a highly challenging task to calculate the proper HTC distribution.
Measurements of HTC at engine condition is extremely difficult, but data from test turbines are available. For example there exists some freely available benchmark HTC data such as the von Karman Institute-data that could be used for comparison with numerical calculated HTC, which has been a common practice both in the industry and the academia.
The purpose with this thesis is to investigate, clarify and suggest optimal ways of working when it comes to the external heat transfer coefficient distribution around turbine component airfoils. The investigation tools for this task include a literature study and numerical calculations using in house codes and commercial CFD software. To evaluate the calculation part of the thesis, a comparison with available open HTC measurements and /or in-house metal temperature measurement should be made.
Your Profile:
- Student at MSc level with focus in mechanical engineering and flow physics
Have good knowledge about heat transfer, boundary layer theory and CFD.
Is structured and can communicate well.
Who can find own ways and solutions to challenges

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Application
Do not hesitate - apply today via https://jobs.siemens-energy.com/jobs , refnr 221287 and no later than November 6th . For questions about the role please contact recruiting manager Mats Annerfeldt mats.annerfeldt@siemens.com 0122-82678.
If you have questions about the recruitment process, please contact Eva Nilsson, eva.e.nilsson@siemens.com
Place of work: Finspång
Trade Union representatives:
Veronica Andersson, Unionen, 0122-840 21
Simon Von Eckardstein, Sveriges Ingenjörer, 0122-842 24
Jan Lundgren, Ledarna, 0122-812 33
Jonny Persson, IF Metall, 0122-817 69