On-board propulsion functions include orbit insertion, orbit maintenance, constellation maintenance, precision positioning, in-space maneuvering, de-orbiting, vehicle reaction control, planetary retro, and planetary descent/ascent. This paper discusses on-board chemical propulsion technology, including bipropellants, monopropellants, and micropropulsion. Bipropellant propulsion has focused on maximizing the performance of Earth storable propellants by using high-temperature, oxidation-resistant chamber materials. The performance of bipropellant systems can be increased further, by operating at elevated chamber pressures and/or using higher energy oxidizers. Both options present system level difficulties for spacecraft, however. Monopropellant research has focused on mixtures composed of an aqueous solution of hydroxl ammonium nitrate (HAN) and a fuel component. HAN-based monopropellants, unlike hydrazine, do not present a vapor hazard and do not require extraordinary procedures for storage, handling, and disposal. HAN-based monopropellants generically have higher densities and lower freezing points than the state-of-art hydrazine and can higher performance, depending on the formulation. High-performance HAN-based monopropellants, however, have aggressive, high-temperature combustion environments and require advances in catalyst materials or suitable non-catalytic ignition options. The objective of the micropropulsion technology area is to develop low-cost, high-utility propulsion systems for the range of miniature spacecraft and precision propulsion applications.


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    Titel :

    On-Board Chemical Propulsion Technology


    Beteiligte:
    B. D. Reed (Autor:in)

    Erscheinungsdatum :

    2004


    Format / Umfang :

    20 pages


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch




    On-Board Chemical Propulsion Technology

    Reed, Brian D. | NTRS | 2004


    On-Board Chemical Propulsion Technology

    Reed, B.D. | British Library Conference Proceedings | 2003


    Chemical propulsion technology

    Priem, R. J. | NTRS | 1980


    On-Board Chemical Propulsion

    Schneider, Steven J. | NTRS | 1997


    On-Board Chemical Propulsion

    S. J. Schneider | NTIS | 1997