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Faculté des Sciences appliquées
Faculté des Sciences appliquées
MASTER THESIS
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Implementation in OpenFoam of a thermal-fluid analysis for thermal internal flows

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Martinez Carrascal, Jon ULiège
Promotor(s) : Terrapon, Vincent ULiège
Date of defense : 21-Aug-2017 • Permalink : http://hdl.handle.net/2268.2/3315
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Title : Implementation in OpenFoam of a thermal-fluid analysis for thermal internal flows
Author : Martinez Carrascal, Jon ULiège
Date of defense  : 21-Aug-2017
Advisor(s) : Terrapon, Vincent ULiège
Committee's member(s) : Dewallef, Pierre ULiège
Salvador, Lucas ULiège
Language : English
Keywords : [en] heat transfer, turbulent flow, OpenFOAM, RANS
Discipline(s) : Engineering, computing & technology > Aerospace & aeronautics engineering
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] A CFD analysis of the flow inside of the VMU MkII in micro-gravity conditions is presented. In the context of complementing the different calculations made by CSL professional using the ESATAN-TMS software, this thesis will contribute to support the existing data of the unit regarding the airflow and the components of the VMU.
After considering the characteristics and conditions of the flow inside this unit, the mathematical formulation of the problem is proposed. Then, the numerical implementation is presented and for this task, the finite volume method OpenFOAM software is used.
A CAD model of the VMU MkII is been loaded and re-built using the SALOME software. After the model is meshed using the snappyHexMesh OpenFOAM utility, a mesh convergence study has been performed defining the mesh where the final results will be obtained.
The results of the thesis display an impact of the bottom rails of the FPIU of 60% in the velocity field and a maximum discrepancy in velocity of 22:37% between the k-w and k-w SST turbulence models. On the other hand, it is observed that the mean temperatures of the components surpass the thermal requirements of the VCU by 4.2K for the VCU, by 53.38K for the CPU and by 97.95K for the SA50-120 modules. Also, the sensitivity analysis for the turbulent intensity at inlets shows that a 1% variation of the turbulent intensity at the inlets gives rise to an average variation of the velocity magnitude of 0.07%.
As a conclusion, it is important to underline that the inclusion of conduction in the
modeling and a different power distribution may be the reason why the mean temperatures
of the components are overestimated. Also, due to the lack of solid experimental
data it is not possible to confirm which turbulence model is more suitable for the case of
study. Finally, the small variations of the solution due to the sensitivity analysis may be
an indicator that the boundary condition for the turbulent kinetic energy at the inlets is
well posed.


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Author

  • Martinez Carrascal, Jon ULiège Université de Liège > Master ingé. civ. aérospat., à fin.

Promotor(s)

Committee's member(s)

  • Dewallef, Pierre ULiège Université de Liège - ULg > Département d'aérospatiale et mécanique > Systèmes de conversion d'énergie pour un dévelop.durable
    ORBi View his publications on ORBi
  • Salvador, Lucas ULiège Université de Liège - ULg > CSL (Centre Spatial de Liège)
    ORBi View his publications on ORBi
  • Total number of views 132
  • Total number of downloads 8895










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