Sökning: "Gasdynamik"

Hittade 4 uppsatser innehållade ordet Gasdynamik.

  1. 1. Lättgaskanonens innerballistik : Teori, simulering och parameterstudie

    Master-uppsats, KTH/Maskinkonstruktion (Avd.)

    Författare :Viktor Landemoo; [2021]
    Nyckelord :Gas dynamics; Internal ballistics; Light gas gun; Gasdynamik; Innerballistik; Lättgaskanon;

    Sammanfattning : En lättgaskanon är en typ av kanon som används vid experiment där mycket snabba förlopp är av intresse, till exempel hypersonisk strömning och höghastighetskollisioner. Kanontypen når betydligt högre hastigheter än en konventionell kanon då projektilen accelereras genom eldröret av en gas med låg molekylmassa som vätgas eller helium istället för krutgaser. LÄS MER

  3. 2. The fate of pebbles and planetesimals entering protoplanetary envelopes

    Master-uppsats, Lunds universitet/Astronomi - Genomgår omorganisation

    Författare :Emil Zadera; [2019]
    Nyckelord :Planet formation; planet; protoplanet; protoplanetary envelope; protoplanetary atmosphere; protoplanetary growth; planetary growth model; accretion rate; vapour blob; vapourblob; vapour planet; transport of water; water on planet; pebbles; planetesimals; pebble accretion; planetesimal accretion; meteors; ablation; fragmentation; sublimation; protoplanetary disk; MMSN; accretion window; accretion channel; accretion; destruction; disruption; terminal velocity; gas; gasflow; shearingbox; exoplanet; Physics and Astronomy;

    Sammanfattning : Planetary embryos grow by the accretion of solid dust-material, ranging from cm- to m-sized pebbles up to km-sized planetesimals. However, the underlying size-distribution of the accreted material is poorly understood. LÄS MER

  4. 3. Theoretical and experimental investigation of the pulsejet engine

    Master-uppsats, KTH/Energiteknik

    Författare :Théo Bour; Félix Coutand; [2016]
    Nyckelord :;

    Sammanfattning : The motivation behind this master thesis is the renewed interest in pulsejet engines towards power or thrust generation for small UAV’s. As technologically simple as it may seem, pulsejet engines appear to be the subject of ongoing scientific debate and controversy with regard to their operating principle. LÄS MER

  5. 4. Parallelisation and Performance Analysis of a TreeSPH Code for Galaxy Simulations

    Master-uppsats, KTH/Numerisk analys, NA

    Författare :Maximilian Volkan Baloglu; [2014]
    Nyckelord :;

    Sammanfattning : In cosmological simulations, the Lagrangian method Smoothed Particle Hydrodynamics is often applied to cover gas dynamics and combined with tree algorithms for long-range potentials like the Barnes-Hut method to include self-gravity and derive the nearest neighbour lists efficiently. In this thesis, a so-called TreeSPH code is parallelized by using MPI and subsequently the performance is analysed. LÄS MER