Decomposition of double salt ionic liquid monopropellant in a microtube for multi-mode micropropulsion applications

Steven P. Berg, Joshua L. Rovey

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A model was developed to predict the set of flow rates and preheat temperatures required to initiate decomposition of the [Emim][EtSO4]-HAN monopropellant in a platinum microtube. The model used a one step Arrhenius reaction rate mechanism derived from empirical data from a previous study and predicted decomposition to occur in less than 10 mm at a preheat temperature of 100°C for an isothermal platinum microtube and 15 μL/s propellant flow rate. The pressure generated by the decomposition, the flow rate required to avoid flashback, and the upper limit on preheat temperature were also considered to complete the full 'startbox'. An experiment was conducted to verify this model and ignition was not observed up to 450°C as measured at the center of the microtube. At 500°C ignition was observed, but in the cooler (∼100°C) inlet section. This 10 mm section was insulated by a layer of PEEK, resulting in a closer to isothermal section and is thus explained by the modeling results.

Original languageEnglish (US)
Title of host publication53rd AIAA/SAE/ASEE Joint Propulsion Conference, 2017
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624105111
StatePublished - 2017
Externally publishedYes
Event53rd AIAA/SAE/ASEE Joint Propulsion Conference, 2017 - Atlanta, Georgia
Duration: Jul 10 2017Jul 12 2017

Publication series

Name53rd AIAA/SAE/ASEE Joint Propulsion Conference, 2017

Other

Other53rd AIAA/SAE/ASEE Joint Propulsion Conference, 2017
Country/TerritoryGeorgia
CityAtlanta
Period7/10/177/12/17

ASJC Scopus subject areas

  • General Engineering

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