Sökning: "Fuel sprays"

Visar resultat 1 - 5 av 49 avhandlingar innehållade orden Fuel sprays.

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

    Författare :Zachary Falgout; [2014]
    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

  2. 2. Advances in Time-gated Ballistic Imaging for Studies of Atomizing Fuel Sprays

    Författare :Mattias Rahm; [2015]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Ultrafast lasers; Ballistic imaging; Atomizing sprays; Fuel sprays; OKE-effect;

    Sammanfattning : The transportation sector of today relies heavily on fossil fuels. This is undesirable both due to the finite nature of the fossil resources and to the effects of global warming. Therefore, there is a need to find alternative fuels and simultaneously develop combustion engines with higher efficiencies. LÄS MER

  3. 3. Numerical Modelling of Fuel Sprays

    Detta är en avhandling från LTH, Lund University

    Författare :Christer Bergström; Lunds universitet.; Lund University.; [1999]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; vibration and acoustic engineering; vacuum technology; hydraulics; Mechanical engineering; Gas turbine.; Temperature fluctuations. Diesel engine; Counter rotating Vortex Pair; CVP; Large Eddy Simulation; Droplet Evaporation; Turbulent flows; LES; Spray; Modelling; Break-up; Maskinteknik; hydraulik; vakuumteknik; vibrationer; akustik; Carbochemistry; petrochemistry; fuels and explosives technology; Petrokemi; bränslen; sprängämnen;

    Sammanfattning : The way the fuel is introduced into the combustion chamber is one of the most important parameters for the power output and the generation of emissions in the combustion of liquid fuels. The interaction beween the turbulent gas flow field and the liquid fuel droplets, the vaporisation of them and the mixing of the gaseous fuel with the ambient air that are vital parameters in the combustion process. LÄS MER

  4. 4. Spray-Wall Interaction of Diesel Sprays

    Detta är en avhandling från LTH, Lund University

    Författare :Alf Magnusson; [2009]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Wall impingement; Diesel sprays; Optical measurements; Model fuel;

    Sammanfattning : A promising combustion concept that aims at reducing emissions from DI Diesel engines is HCCI (Homogeneous Charge Compression Ignition). To achieve a combustible air/fuel mixture in such an engine one possible strategy is early fuel injection during the compression stroke, even though the in-cylinder conditions are different from those in conventional DI diesel engines. LÄS MER

  5. 5. Large Eddy Simulation of Atomizing Sprays

    Detta är en avhandling från LTH, Lund University

    Författare :Holger Grosshans; Lunds universitet.; Lund University.; [2013]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Atomization; Multiphase Flows; Jets; Sprays; Large Eddy Simulation;

    Sammanfattning : Liquid-gas two-phase flows occur frequently in daily life, in nature e.g. falling rain drops or waves in the sea, and in industrial applications, e.g. LÄS MER