Development and Testing of a Green Monopropellant Ignition System

Metadata Updated: February 28, 2019

The proposed experiment will demonstrate the potential of a novel micro-hybrid gas generator to thermally dissociate aqueous solutions of hydroxylamine nitrate (HAN). This ammonium salt lies within a class of ionic liquids (ILs) that have recently been investigated as alternative green replacements for hydrazine as a spacecraft propellant. The proposed research is directly aligned with two key elements of NASA's Space Technology Roadmap. 1) NASA TA01.1.4.2, Launch Vehicle Propulsion Technologies, Ancillary Propulsion Systems: Develop and mature ignition concepts that require low part count and/or low energy to be used as either primary or redundant ignition sources, and 2) NASA TA02.1.1.1, In-Space Propulsion Technologies, Liquid Storable Propellants: Evaluate alternate green propellants that allow thrusters to operate in pulse and continuous modes with these new propellants. Qualify propellants and components (valves, filters, regulators etc.) for spaceflight.

While the primary purpose of this research is to support in-space propulsion, the technology could also be adapted for use as a main booster ignition system and as a reaction control thruster. A primary research objective is to demonstrate repeatable, consistent ignition of ionic-liquid-based propellants. With the current state of the art, propellants based on IL-solutions are notoriously difficult to ignite, and a cold-start capability does not exist. Existing catalyst beds used to dissociate the IL component of the solution must be pre-heated to greater than 350 C before firing. This shortcoming is especially disadvantageous for small satellite propulsion systems where energy conservation and volumetric efficiency are primary considerations.

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Public: This dataset is intended for public access and use. License: U.S. Government Work

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Metadata Created Date August 1, 2018
Metadata Updated Date February 28, 2019

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Harvested from NASA Data.json

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Resource Type Dataset
Metadata Created Date August 1, 2018
Metadata Updated Date February 28, 2019
Publisher Space Technology Mission Directorate
Unique Identifier TECHPORT_91637
Maintainer Email
Public Access Level public
Bureau Code 026:00
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Catalog Describedby
Harvest Object Id 86a163fa-c7e4-430d-a3c7-01be46c31078
Harvest Source Id 39e4ad2a-47ca-4507-8258-852babd0fd99
Harvest Source Title NASA Data.json
Data First Published 2017-08-01
Homepage URL
Data Last Modified 2018-07-19
Program Code 026:027
Source Datajson Identifier True
Source Hash bab9322e43e4c23fb7951475e8b3260ca80f4fff
Source Schema Version 1.1

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