Computer Science – Performance
Scientific paper
Oct 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004esasp.557e..24f&link_type=abstract
Proceedings of the 2nd International Conference on Green Propellants for Space Propulsion (ESA SP-557). 7-8 June 2004, Chia Lagu
Computer Science
Performance
Scientific paper
The current need to identify the most promising liquid propellants for use in future space propulsion systems entails the establishment of critical and objective requirements that allow for the selection of such propellants for future development and use. Key requirements seem likely to be either optimum performance or reduced costs. The first is likely to be a primary requirement for commercial and scientific spacecrafts, in terms of specific or density impulse, along with reliability and operational activities' costs. The later plays a major role in the continuing interest in low-cost access to space, particularly for small satellites launched into LEOs. Efforts towards providing cost reduction of space applications of propellants have already been made within the scope of developing what is generally designated as "Green Propellants". The existing information resulting from research programmes on new propellants identifies crucial issues: • the need for a coherent and generally accepted nomenclature reflecting the true reality of these propellants; -- the need for the establishment of critical and objective criteria that allow for the selection of the most promising candidates as propellants for future development and use in the various space applications; 1 The designation of "Green Propellants" is misleading from scientific (existing toxicity data on these new energetic materials that strongly indicate that there are no truly "non-toxic monopropellants") and a requirements' point of view. In this publication a substitution of this term is advocated, sustained by reasons inherently related with the emphasis underlying the concept of "Green Propellants" (i.e., development of new materials to replace the established propellants which are toxic materials). - the need to establish an impartial ranking of thepropellants under development. These emerge crucially from the fact that currently available resources to develop and qualify new propellants are very limited, thus justifying ever more an early as possible identification of the most promising candidates under development. This paper reports on an initiative undertaken to attempt to establish the needed critical and objective requirements.
Ford Matthew
Frota O.
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