Hypergolic hybrid motors have the potential to improve the safety, reliability, and versatility of rocket systems. They may also serve as a viable replacement for highly toxic liquid fuels (for example, hydrazine, monomethyl hydrazine, etcetera) conventionally used in hypergolic systems. Ammonia borane (AB)-based fuels are relatively nontoxic hydrogen-dense solids that have good theoretical performance. AB has also been found to be highly hypergolic with white fuming nitric acid (WFNA), potentially enabling it to replace existing toxic hypergolic fuels. In this work, hypergolic ignition delay tests were performed on AB synthesized with a novel water-promoted scalable process to characterize its performance as a hypergolic fuel. Typical ignition delays with WFNA were found here to be approximately 2–10 ms. Ignition delay tests performed with AB powder sieved into different particle size ranges indicated a particle size dependency for the ignition delay, with the finer AB particles ( D < 45    μ m ) igniting after shorter delays. AB was successfully incorporated into Sylgard®-184, which is a silicone elastomer binder, and ignition delay tests were performed on high solids loading (80%) Sylgard-184-AB pellets. Mean ignition delays for the Sylgard-184-AB fuel pellets tested were less than 50 ms, which may make the formulation viable for use in hypergolic hybrid motors.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Characterization of the Hypergolic Ignition Delay of Ammonia Borane


    Beteiligte:

    Erschienen in:

    Erscheinungsdatum :

    2018-11-08


    Format / Umfang :

    8 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




    Experimental Study of Factors Affecting Hypergolic Ignition of Ammonia Borane

    Clements, Kathryn A. / Baier, Michael J. / Ramachandran, P. Veeraraghavan et al. | AIAA | 2020


    An Experimental Study of Factors Affecting Hypergolic Ignition of Ammonia Borane

    Clements, Kathryn / Baier, Michael / Ramachandran, P. Veeraraghavan et al. | AIAA | 2019


    Demonstration of ammonia borane-based hypergolic ignitor for hybrid rocket

    Jeong, Junyeong / Kim, Kyu-Seop / Bhosale, Vikas Khandu et al. | Elsevier | 2022


    Hypergolic Ionic Liquids: Ignition Delay Dependence on Pressure

    Thomas, Anna E. / Stober, Keith J. / Cantwell, Brian J. | AIAA | 2017


    Ignition of hypergolic propellants

    Dambach, Erik Michael | TIBKAT | 2010