Current State-of-the-Art of HNF Based Composite Propellants

Details Current State-of-the-Art of HNF Based Composite Propellants Current State-of-the-Art of HNF Based Composite Propellants

Oct 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004esasp.557e..37c&link_type=abstract

Proceedings of the 2nd International Conference on Green Propellants for Space Propulsion (ESA SP-557). 7-8 June 2004, Chia Lagu

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In this frame Vega, with its first three solid stages, will include a number of advanced technological solutions. Further improvements are being considered for evolutions of Ariane 5 in the medium term. The main activities currently performed for the development of HNF-based propellants are presented. The objectives and approach adopted are described. The results obtained on the HNF decomposition mechanism and on the re- and co-crystallisation of HNF with potential propellant ingredients are presented. The experimental activities for the screening of a number of HNF-based propellant candidates are discussed. Current limitations and open points are identified, and the future steps for consolidating the interest and feasibility of an HNF-based propellant development are indicated. For the long term, possible improvements could be achieved through the use of high energetic materials, including oxidiser and/or binders, in advanced propellant formulations. While still paying attention to the cost of the raw material, these formulations offer the advantage of an increased specific impulse, which has a positive impact on the cost of the loaded motor case. The European Space Agency has been pursuing research and technology development activities on HNF and HNF-based propellants to investigate their interest and feasibility for possible future space applications. These propellants seem to offer the potential for performance improvements, and for providing clean exhaust gases.

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