Sökning: "Primary break-up"

Visar resultat 1 - 5 av 6 avhandlingar innehållade orden Primary break-up.

  1. 1. Experimental Studies of Primary Break-up of Diesel Engine Fuel Injector Sprays

    Författare :Zachary Falgout; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Water sprays; Sprays; Turbulence; Transparent injectors; Diesel engines; Cavitation; Primary break-up; Orifice flow; Multiphase flows; Transcritical fluids;

    Sammanfattning : This thesis will focus on experimental studies of primary breakup of pressure-atomized sprays. The industrial application that this thesis will address is fuel sprays in modern Diesel engines, and so the focus will be sprays emitting into relatively slow-moving, high pressure, high-temperature gases. LÄS MER

  3. 2. Traces in Earth's geological record of the break-up of the L-chondrite parent body 470 Ma

    Författare :Carl Alwmark; Berggrundsgeologi; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; L chondrite; Middle Ordovician; extraterrestrial material; meteorite flux; Sweden;

    Sammanfattning : This thesis deals with signatures in sediments on Earth related to the L-chondrite parent body break-up event at 470 Ma. The aim of this thesis is twofold: (1) investigate if the increased flux of extraterrestrial material to Earth, following the disruption of the L-chondrite parent body included larger, asteroid-sized bodies (2) try to develop new methods and tools for finding and classifying relict cosmic material in sediments. LÄS MER

  4. 3. Measurement and evaluation of near-field spray kinematics for nozzles with asymmetrical inlet geometries

    Författare :Mohammad Nikouei; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Nozzle Geometry; Spray Dynamics; Spray Velocity; Diesel Spray; Ballistic Imaging;

    Sammanfattning : In diesel engines, fuel injection parameters have a commanding effect on mixing and combustion quality. This research aims to enhance the fundamental knowledge of fuel sprays and their primary break-up. In addition, this research provides statistical data to validate simulation models and improve the prediction accuracy in mixing and combustion. LÄS MER

  5. 4. Visual outcome, ocular findings, and visual processing skills after allogeneic stem cell transplantation in children

    Författare :Alba Lucia Törnquist; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : Background: Stem cell transplantation (SCT) offers a chance of cure in children with leukaemia and other life-threatening haematological, immunological, and metabolic diseases that do not respond to conventional treatment. Pre and post SCT, these children receive irradiation, and/or chemotherapy and immunosuppressive agents which like the primary disease may adversely affect the eye, the central nervous system as well as the posterior visual pathways and potentially threaten vision. LÄS MER

  7. 5. Den första massutvandringen : en studie av befolkningsrörlighet och emigration utgående från Alfta socken i Hälsingland 1846-1895

    Författare :Kjell Söderberg; Umeå universitet; []
    Nyckelord :HUMANIORA; HUMANITIES;

    Sammanfattning : The first mass emigrationAlready during- the first half of the 1840's a number of smaller group emigrations from Sweden took place. However it was not until 1846 that the first real break­through in emigration occurred when the Erik Jansonist sect began emigrating. LÄS MER