Essays about: "Propellant"

Showing result 21 - 25 of 64 essays containing the word Propellant.

1. 21. Lifetime prediction of a polymeric propellant binder using the Arrhenius approach

   University essay from Uppsala universitet/Tillämpad materialvetenskap

   Author : Johannes Bohlin; [2021]
   Keywords : Polymer; Thermal-oxidative degradation; Lifetime prediction; Propellant; Arrhenius; Aging experiments; Diffusion-limited oxidation;

   Abstract : The thermal-oxidative degradation of a crosslinked hydroxy-terminated polybutadiene (HTPB)/cycloaliphatic diisocyanate (H12MDI) based polymer, which is commonly used as a polymeric binder in propellants, is investigated at temperatures from 95°C to 125°C with the aim of estimating the lifetime of the material in storage conditions (20°C) using the Arrhenius approach. Furthermore, the effect of antioxidants and to a lesser extent plasticizer on the degradation process was also studied. READ MORE

3. 22. Multiple fly-by for interplanetary missions

   University essay from Luleå tekniska universitet/Rymdteknik

   Author : Javier Chivite Sierra; [2021]
   Keywords : ;

   Abstract : Current state-of-the-art of propulsion system for space vehicles does not allow to deliver therequired payload for the mission to all bodies in the Solar System. Therefore, alternatives havebeen developed to reach those bodies without having the necessary technology. READ MORE

4. 23. Heat and fluid control solutions for deep space CubeSat CGPS

   University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

   Author : Filipp Byström-Troyan; [2021]
   Keywords : Cold gas propulsion; Thermal control; Computer simulation; Kallgasframdrivning; Termisk analys; Datorsimulering;

   Abstract : This thesis is on the subject of how propellant heating considerations affect the design of a CubeSat cold gas propulsion system. Computer simulation tools are used to analyse heat flow through the system, as well as the fluid flow and phase change of butane. READ MORE

5. 24. Design of a Level Sensing System for the Propellant Tank of a Microlauncher

   University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

   Author : Robin Scholtes; [2021]
   Keywords : Level Sensing; Cryogenic; Microlauncher; Liquid Oxygen; Nivåavkänning; Kryogen; Mikrobärraket; Flytande Syre;

   Abstract : The present report aims to show the development process of a liquid level sensing system for the use within the propellant tanks of a launch vehicle. Whereas many recent launchers use discrete level sensing systems to indicate the amount of fuel on defined spots like fill-stop and engine cut-off, in this report a continuous capacitance based sensor probe is described. READ MORE

6. 25. Sunshade Demonstrator Spacecraft Earth Sphere of Influence Escape Using a Propellant-free AOCS

   University essay from KTH/Rymdteknik

   Author : Leonardo Ricci; [2021]
   Keywords : Solar sail; Solar radiation pressure; Attitude control; Escape trajectory; Centre of pressure; Disturbance Torques; Eclipse.; Solsegel; Solstrålningstryck; Attitydkontroll; Flyktbana; Tryckcentrum; Störningsmoment; Eclipse.;

   Abstract : This thesis provides insights to what is peculiar about a solar sail attitude and orbit control system and provides the assessment, in the form of a feasibility study, of the effectiveness of sail tip vanes as a control hardware to escape the Earth sphere of influence. The demonstrator aims to prove the technology for the Sunshade project, a constellation of solar sails located at the Lagrangian point L1 to obscure part of the solar radiation directed towards earth. READ MORE