Essays about: "space propulsion"

Showing result 41 - 45 of 61 essays containing the words space propulsion.

  1. 41. Improving thermal fracture resistance in ceramic microcomponents for spacecraft propulsion

    University essay from Uppsala universitet/Ångström Space Technology Centre (ÅSTC)

    Author : Erika Åkerfeldt; [2018]
    Keywords : HTCC; MEMS; MST; microthruster; thermal fracture;

    Abstract : Because of thermal transients and gradients occurring upon rapid heating or cooling, microcomponents made from High-Temperature Co-fired Ceramics (HTCC) often fail at temperatures far below what the materials can withstand per se. This work investigates how resistance to thermal fracture in HTCC microcomponents can be increased by improving the component design, aiming at increasing the thermal performance of a microthruster with integrated heaters. READ MORE

  3. 42. Numerical simulation of the electric propulsion’s effects on the spacecraft

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

    Author : David Nguyen van Sang; [2018]
    Keywords : ;

    Abstract : As electric propulsion is now the focus in the space industry, its negativeeffects on the spacecraft have yet to be fully understood. Indeedthis type of propulsion deeply modifies the ambient plasma surroundingthe spacecraft and can affect severely many subsystems by erosion,charging or contamination. READ MORE

  4. 43. Examination and Design of Propeller Configurations foran Electrically Powered Hydrofoil Vehicle

    University essay from KTH/Marina system

    Author : Joakim Wallberg; [2018]
    Keywords : ;

    Abstract : The thesis examines propeller configurations for the propulsion system for the water mode in the amphibious craft concept Newt, which also includes contra-rotating propellers. Newt is a research project on innovative commuter vehicles carried out by the naval architecture department at KTH. READ MORE

  5. 44. Numerical simulations of thedecomposition of a greenpropellant

    University essay from KTH/Mekanik

    Author : Neven Louis; [2018]
    Keywords : Green propellant; energetic ionic liquids; two-phase flow; rocket propulsion; CFD; High-speed shadowgraphy; Isolated droplet combustion;

    Abstract : Concerns about the use of certain chemical species within the aerospace field are growing in recent years. A European regulation, REACh, now makes the use of hydrazine uncertain in – among others- attitude control thrusters. Green monopropellants, which are alternatives for this species already exist, but they all require a catalyst to react. READ MORE

  6. 45. A CFD Analysis of Cyclodial Propellers

    University essay from Linköpings universitet/Mekanisk värmeteori och strömningslära

    Author : Fredrik Thelin; [2017]
    Keywords : CFD; Fluid mechanics; Propeller; Ship propulsion;

    Abstract : The quest for more efficient machines is always ongoing in the engineering world. This project is no different. ABB are investigating a new type of propeller that seems to offer increased efficiency compared to normal screw propellers. That is a so called foil wheel propeller. READ MORE