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See detailPROPULSION AND VEHICLE INTEGRATION FOR REUSABLE LAUNCHER USING IN-FLIGHT OXYGEN COLLECTION
Bizzarri, Didier; Hendrick, Patrick; Heyen, Georges ULg et al

in EUROPEAN CONFERENCE FOR AEROSPACE SCIENCES (EUCASS) (2005, July)

The use of in-flight Oxygen Collection has shown to significantly improve space launcher performance. The conceptual approach followed by the Royal Military Academy of Brussels (RMA) has tried to widen ... [more ▼]

The use of in-flight Oxygen Collection has shown to significantly improve space launcher performance. The conceptual approach followed by the Royal Military Academy of Brussels (RMA) has tried to widen the available design margins in order to reduce the required technological leap and limit the economical risk associated with such a development. The aim of the ESA-funded theoretical and experimental study on an air separation device is to demonstrate the possibility of performing efficient air distillation in a compact rotating column. An integration of the vehicle, propulsion system and separation unit designs is presented aiming to optimise the overall vehicle performance while keeping technological difficulty and system complexity at a reasonable level. Reference vehicles are presented in their specific mission profiles with an emphasis on TSTO’s. Different layouts of the internal energy and mass flowsheets have been studied and were compared in order to make best use of the refrigeration capacity of the hydrogen fuel running though the propulsion system during the first phase of the flight considering the separator as a classical distillation column. This analysis provides the requirements in terms of heat exchange capacity, compression ratios and number of so-called transfer units needed in the separator. Here, the system is intentionally kept simple, to limit complexity, but the analysis is thorough and accurate, including, for example, the effect of the presence of argon. Results for a supersonic carrier are presented. An analysis of the separation unit to reach those requirements has been performed. That includes internals, practical building with estimates of pressure drop, separation performance and flow limitation. The sizing of the separator bed is provided for a carrier plane showing that such on-board separator is indeed practical. [less ▲]

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See detailPropulsion vehicle integration for reusable launcher using in-flight oxygen collection
Bizzarri, D.; Hendrick, Patrick ULg; Heyen, Georges ULg et al

in Aerospace Science and Technology (2008), 12(6), 429-435

The use of in-flight oxygen collection has shown to significantly improve space launcher performance. The conceptual approach followed by Belgian teams working on oxygen collection has been to try to ... [more ▼]

The use of in-flight oxygen collection has shown to significantly improve space launcher performance. The conceptual approach followed by Belgian teams working on oxygen collection has been to try to widening the available design margins in order to reduce the required technological leap and limit the economical risk associated with such a development. The aim of the ESA-funded theoretical and experimental study on an air separation device is to demonstrate the possibility of performing efficient air distillation in a compact rotating column. An integration of the vehicle, propulsion system and separation unit designs is presented. The objective is to optimise the overall vehicle performance while keeping technological difficulty and system complexity at a reasonable level. Reference vehicles are presented within their specific mission profiles with an emphasis on TSTO's. Different layouts of the internal energy and mass flowsheets have been studied and were compared in order to make best use of the refrigeration capacity of the hydrogen fuel running through the propulsion system during the first phase of the flight. In those flowsheets, the separator is considered as a classical distillation tray column. That analysis provides the requirements in terms of heat exchange capacity, compression ratios and number of so-called transfer units needed in the separator. The system is intentionally kept simple to limit complexity, but the analysis is thorough and accurate, including, for example, the effect of the presence of argon. Results for a supersonic carrier are presented. A compact separation unit has been designed in order to reach those requirements. That includes internals, practical building with estimates of pressure drops, separation performance and flow limitation. Main results are given, sizing of the separator bed is provided for a carrier plane showing that such on-board separator is indeed practical. (C) 2007 Elsevier Masson SAS. All rights reserved. [less ▲]

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See detailLa prorogation et la reconduction du contrat en droit belge
Kohl, Benoît ULg

in La fin du contrat (2001)

Detailed reference viewed: 66 (5 ULg)
See detailPros and Cons University-based Business Schools
Froehlicher, Thomas ULg

Conference (2009, October 24)

Detailed reference viewed: 54 (4 ULg)
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See detailLe prosaïsme en poésie
Purnelle, Gérald ULg

Article for general public (2009)

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See detailProse di romanzi. Raccolta di studi (1979-2000)
Moreno, Paola ULg

in Moyen Age (Le) (2005)

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See detailThe Prose Poem and the Critics
Delville, Michel ULg

in The Prose Poem: an International Journal (1998)

Detailed reference viewed: 10 (3 ULg)
See detailThe Prose Poem and the Third Body
Delville, Michel ULg

Scientific conference (2012, September 14)

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See detailThe Prose Poem Now
Delville, Michel ULg; Alkhateeb, Tahseen

in AL-QUDS Al-arabi (2003)

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See detail"Prose" - direction du "Dossier américain" (116 pages)
Delville, Michel ULg

in Formes Poétiques Contemporaines (2006), 4

Direction du dossier "dossier américain" du vol. 4 de la revue FPC (2006): pp. 213-328

Detailed reference viewed: 10 (2 ULg)
See detailProsélytisme catholique, subversion douce et explosion des frontières : une histoire de la bande dessinée en Belgique
Dejasse, Erwin ULg

Conference given outside the academic context (2010)

Conférence qui tente de dresser un panorama historique de la bande dessinée belge du XIXe siècle à nos jours .

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See detailProsodic marking of information status in Dutch and French as foreign languages. Production and perception
Rasier, Laurent ULg; Caspers, Johanneke; Van Heuven, Vincent

Conference (2010)

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See detailProsodic Transfer from L1 to L2. Methodological Issues and Description
Rasier, Laurent ULg; Hiligsmann, Philippe

in Nouveaux Cahiers de Linguistique Française (2007), 28

Detailed reference viewed: 33 (3 ULg)