Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 13 of 13 for “"monopropellant"”.
-
Linear burn rate of green ionic liquid multimode monopropellant
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2020-02-28 without embargo terms
-
Electrospray power processing unit for a monopropellant-electrospray multimode thruster
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2023-04-12 without embargo terms
-
Design of a Bimodal Chemical-Electrospray Propulsion System using Ionic Liquid Monopropellants
… currently exist for spacecraft: chemical (e.g. monopropellant, cold gas, solid propellant) and electric (e.g. Hall thruster, ion engine, electrospray). Chemical propulsion typically offers high thrust and low specific impulse, while electric propulsion provides the inverse of low thrust and high …
-
Investigation on Ammonium Perchlorate Based Electrically Controlled Propellants
… behavior of an electrically controlled gel monopropellant (ECGP) composed of an ionically conducting liquid polymer (polyethylene glycol) and ammonium perchlorate (AP) was conducted. Complexation of AP with PEG enabled ion transport when a voltage was applied resulting in ignition. Although …
-
Electrospray Thrusters in Chemical-Electric Multimode Propulsion for Small Satellites
… systems. However, recent advancements in green monopropellants -- developed as less-toxic alternatives to hydrazine in chemical monopropellant thrusters -- have created a new family of ionic liquids monopropellants, making them the natural propellant for a highly compact form of electric …
-
CubeSat constellation implementation and management using differential drag
… on timescales of weeks [5, 6, 7, 8, 9]. Monopropellant systems also currently exist for CubeSats, but, like cold gas systems, they can require significant power, mass, volume, and thermal management resources, and they also carry more risk [9, 10]. Launch services providers often limit …
-
The design and feasibility of a 10 mN chemical space propulsion thruster
… For small delta velocity missions ( 200 m/s), a monopropellant chemical propulsion system is advantageous to current electric propulsion and cold gas thrusters due to the low system mass.
-
Exploration of Planetary Bodies with Electrospray Thrusters
… density of electrospray propulsion, relative to monopropellant or cold-gas propulsion, likely constrains many propulsion architectures to have a single thrust axis with respect to the spacecraft body, complicating the trajectory design process. Second, the ability to operate electrospray …
-
Nuclear Electric Propulsion with Low Enriched Uranium
Most space missions have used monopropellant or fuel-oxidiser propulsion systems to provide the required delta-v for orbital transfers and other in-space manoeuvres. Electric propulsion offers an alternative means of providing thrust that makes much more economical use of propellant due to its very …
-
Two-Dimensional Modeling of AP/HTPB Utilizing a Vorticity Formulation and One-Dimensional Modeling of AP and ADN
… been utilized to model the combustion of the monopropellants AP and ADN, and a two-dimensional diffusion flame model has been developed to examine the flame structure above an AP/HTPB composite propellant. This work was part of an ongoing effort to develop theoretically based, <em>a …
-
Hybrid Chemical-Electric Propulsion Systems for CubeSats
… modeling of a cold gas thruster, a green monopropellant, and an ion thruster. The optimality gap with previously generated designs is then quantified. Hybrid designs with a volume as small as 1.5U can then exceed the performance of single-mode systems. This approach demonstrates that …
-
Development of a High Performance Micropropulsion System for CubeSats
Picosatellites are defined as satellites with a mass between 0.1 and 1kg (Miniaturized satellite). Picosatellites are typically designed to work together or function in formations (Miniaturized satellite). A specific type of Picosatellite known as CubeSats were introduced in 1999 and since then …
-
Characterization of Electrically Controlled Gel Polymer Electrolyte Monopropellants
… interest in the development of nontoxic monopropellants for the replacement of hydrazine and its derivatives stems from the desire for safer and thus more cost-effective alternatives. Ionic liquid monopropellants based on the hydroxylammonium nitrate and ammonium dinitramide ionic …