Faculté des Sciences appliquées
Faculté des Sciences appliquées

Master thesis and internship[BR]- Master's Thesis : On the use of different test gases in the longshot tunnel to simulate different planetary entries[BR]- Internship (linked to master's thesis)

Purnode, Martin ULiège
Promotor(s) : Dimitriadis, Grigorios ULiège
Date of defense : 25-Jun-2020/26-Jun-2020 • Permalink :
Title : Master thesis and internship[BR]- Master's Thesis : On the use of different test gases in the longshot tunnel to simulate different planetary entries[BR]- Internship (linked to master's thesis)
Translated title : [fr] De l'utilisation de différents gaz tests dans la soufflerie Longshot en vue de simuler différentes entrées planétaires
Author : Purnode, Martin ULiège
Date of defense  : 25-Jun-2020/26-Jun-2020
Advisor(s) : Dimitriadis, Grigorios ULiège
Committee's member(s) : Hillewaert, Koen ULiège
Grossir, Guillaume 
Language : English
Number of pages : 110
Keywords : [en] atmospheric reentry
[en] Longshot wind tunnel
[en] Hydrogen
[en] Mixture equation of state
[en] Icy Giants
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


[en] A discussion of the different types of hypersonic wind tunnels, with their capabilities and limitations is provided. The method used for the duplication of the conditions encountered during the reentry is highlighted in the specific case of the measurement of the aerodynamic parameters. A special attention is then given to the Galileo probe mission and the future mission to the Icy Giants. In order to increase the simulation capabilities of the Longshot wind tunnel, different gases are proposed to duplicate the conditions encountered during an atmospheric entry. Hydrogen, argon, oxygen, air, methane and a mixture equation of state are presented. The thermodynamic results are compared to the reference data provided by the Nist or the experimental measurements. These equations of state are accurate on a large temperatures and pressures range. The mixture equation is tested for several concentration of oxygen and nitrogen with the same type of error in all the cases. Hydrogen safety recommendations highlight the flammability and detonability hazard of this gas. The second risk of this gas is linked to the embrittlement this gas causes in several materials. Health hazards are limited to the general asphyxiant risks. A series of simulations using hydrogen as test gas is performed inside a L1D program that simulate the behaviour of the gas inside the Longshot. The behaviour of hydrogen differs from nitrogen. The velocity of the shock wave, the maximum temperature and the maximum pressure are higher in the case of hydrogen, while the compression due to the passage of the shock is far lower than when using nitrogen. New initial conditions should be designed for a pertinent use of hydrogen inside the Longshot.



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  • Purnode, Martin ULiège Université de Liège > Master ingé. civ. aérospat., à fin.


Committee's member(s)

  • Hillewaert, Koen ULiège Université de Liège - ULiège > Département d'aérospatiale et mécanique > Design of Turbomachines
    ORBi View his publications on ORBi
  • Grossir, Guillaume VKI
  • Total number of views 55
  • Total number of downloads 164

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