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Faculté des Sciences appliquées
Faculté des Sciences appliquées
MASTER THESIS
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Master thesis : Tip leakage flow in high pressure turbines

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Liu, Yu ULiège
Promotor(s) : Terrapon, Vincent ULiège
Date of defense : 21-Aug-2017 • Permalink : http://hdl.handle.net/2268.2/3691
Details
Title : Master thesis : Tip leakage flow in high pressure turbines
Author : Liu, Yu ULiège
Date of defense  : 21-Aug-2017
Advisor(s) : Terrapon, Vincent ULiège
Committee's member(s) : Golinval, Jean-Claude ULiège
Zhengping, Zou 
Language : English
Discipline(s) : Engineering, computing & technology > Aerospace & aeronautics engineering
Target public : Professionals of domain
Student
General public
Institution(s) : Université de Liège, Liège, Belgique
Degree: Master en ingénieur civil en aérospatiale, à finalité spécialisée en "aerospace engineering"
Faculty: Master thesis of the Faculté des Sciences appliquées

Abstract

[en] In the framework of this master thesis, a numerical study has been carried out in order to investigate
the effect of tip geometry on the tip leakage flow and heat transfer features in a unshrouded high
pressure axial flow turbine stage designed by Erhard of the TTM laboratory in Austria. Four different tip profiles were considered,
namely a default flat tip, a modified flat tip, a modified double squealer tip and a modified double
thin squealer tip. The performances of the distinct tip profiles were compared to determine the improvement
in terms of leakage mass flow rate and heat transfer. The computations were carried out
on a single rotor blade with periodic boundary conditions. Grid independence study was performed
in order to determine the adequate mesh to employ for the computations. Turbulence was modelled
with the BSL-RSM model because it provides more advantages than its SST counterpart model. At
the end, it was proven that adoption of a cavity can drastically enhance the aerothermal performances,
that is, providing a decrease in the leakage loss and average heat transfer over the tip.


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Author

  • Liu, Yu ULiège Université de Liège > Master ingé. civ. aérospat., à fin.

Promotor(s)

Committee's member(s)

  • Golinval, Jean-Claude ULiège Université de Liège - ULg > Département d'aérospatiale et mécanique > LTAS - Vibrations et identification des structures
    ORBi View his publications on ORBi
  • Zhengping, Zou
  • Total number of views 44
  • Total number of downloads 381










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