Sökning: "hydrazine"

Visar resultat 1 - 5 av 6 uppsatser innehållade ordet hydrazine.

  1. 1. Conjugate Heat Transfer Analysis of HPGP Thruster

    Master-uppsats, Luleå tekniska universitet/Rymdteknik

    Författare :Lisa Svensson; [2024]
    Nyckelord :aerospace; HPGP; ECAPS; ANSYS; conjugate heat transfer; thruster; space;

    Sammanfattning : This master's thesis was conducted in collaboration with ECAPS, where a conjugate heat transfer analysis on their High Performance Green Propulsion (HPGP) 22N thruster was done. ECAPS is a Swedish propulsion company specializing in green propulsion. They develop thrusters for spacecraft orbit and attitude control, utilizing the propellant LMP-103S. LÄS MER

  3. 2. Passivation of Gallium Arsenide Nanowires for Solar Cells

    Master-uppsats, Lunds universitet/Fasta tillståndets fysik; Lunds universitet/Fysiska institutionen

    Författare :Austin Irish; [2019]
    Nyckelord :nanowires; semiconductors; solar cells; photovoltaics; passivation; electronics; chemistry; polymers; hydrazine; plasma; gallium; arsenic; iii-v; epitaxy; photoluminescence; time-resolved; spectroscopy; Physics and Astronomy;

    Sammanfattning : A strategic and diverse set of passivation methods for gallium arsenide nanowires wasstudied. Using a time-resolved photoluminescence setup at100 Kand300 K, the radiativerecombination of charge carriers was resolved on a picosecond time scale. LÄS MER

  4. 3. Numerical simulations of thedecomposition of a greenpropellant

    Master-uppsats, KTH/Mekanik

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

    Sammanfattning : 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. LÄS MER

  5. 4. Investigation of Nitromethane Combustion Using Laser Induced Fluorescence

    Master-uppsats, Lunds universitet/Fysiska institutionen; Lunds universitet/Förbränningsfysik

    Författare :Said Ali Said El-Busaidy; [2016]
    Nyckelord :Laser Induced fluorescence Nitromethane Combustion Chemiluminescence; Physics and Astronomy;

    Sammanfattning : Pre-mixed nitromethane/air/nitrogen flames on a heat-flux burner are investigated at atmospheric pressure with equivalence ratios of =0.8 and =1.2. Flame thermometry and chemiluminescence spectrum were used to characterise the flame before carrying out saturated laser induced fluorescence on NO molecules. LÄS MER

  7. 5. Data acquisition system for rocket engine hot fire testing

    Magister-uppsats, KTH/Maskinkonstruktion (Inst.)

    Författare :Linus Holmeros; [2009]
    Nyckelord :;

    Sammanfattning : ECAPS har utvecklat ett unikt drivmedel med tillhörande raketmotor för satellitstyrning som skall kunna ersätta Hydrazin, vilket idag är det vanligaste bränsle ombord på satelliter. Hydrazin är extremt giftigt och cancerogent. Det nya drivmedlet har 6 % högre specifik impuls samt 30 % högre densitetsimpuls jämfört med Hydrazin. LÄS MER