Mathematics – Logic
Scientific paper
Oct 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004esasp.555e..57v&link_type=abstract
Proceedings of the 4th International Spacecraft Propulsion Conference (ESA SP-555). 2-9 June, 2004, Chia Laguna (Cagliari), Sard
Mathematics
Logic
Scientific paper
Diaphragms and bladders are used as positive expulsion devices in liquid propulsion systems since the early stages of space flight. This paper presents an identification of the critical properties of polymeric materials for positive expulsion systems and an overview of the applicable mechanical and chemical performance requirements identified and tested in the frame of ESA technology development initiatives either carried out as R&D activities or within specific hardware development programs for Spacecraft projects. A set of requirements based on those experiences is presented. Finally, an approach of modelling and a comparison with experimental results is proposed for the identified critical properties. Materials currently adopted or considered suitable for potential utilisation in Monopropellant (Hydrazine) and Bipropellant systems (UDMH-NTO) have been treated. Possible alternative materials have also been described to provide a wider view of potential technological solutions.
Caramelli F.
Valencia Bel F.
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