Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 8 of 8 for “"Spray tip"”.
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The effect of fuel injection pressure and in cylinder temperature on igniton delay, combustion performance and emission
… delay period. Increased injection pressures make spray tip penetration longer and promotes a greater amount of fuel-air mixing occurs during ignition delay which is gives early rise of heat release rate. Higher injection rate was promoted both mixing and atomization increase heat release rate as …
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CFD Modelling of the Mixture Preparation in a Modern Gasoline Direct Injection Engine and Correlations with Experimental PN Emissions
… used characteristics of the high-pressure fuel spray. The methodology utilised the Siemens STAR-CD 3D CFD software environment and employed a combination of statistical and optimization methods supported by experimental data. The calibration process identified dominant factors influencing spray …
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Electrospray Fundamentals and Non-Covalent Peptide-Lipid Interactions as Studied by Fourier Transform Ion Cyclotron Reonance Mass Spectrometry
… metal capillary and Taylor cone of the electrospray (ES) device. Results show that the measured potential difference increases as the internal probe travels toward the ES capillary exit, with values rising sharply as the base of the Taylor cone is penetrated. Higher conductivity solutions …
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Mixing and Combustion Studies in an Optically-Accessible Small-Bore High-Speed Direct -Injection Diesel Engine
… on mixing and combustion. A single main and multiple injection strategy were investigated in this study, varying injection pressures and first injection timings and quantities. Laser-induced exciplex fluorescence was used to obtain simultaneous liquid and vapor fuel distributions within the …
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Spray visualization and characterization of a multi variable circular orifice (MVCO) injector coupled with a swirl adapter for diesel reformer applications
The fuel spray generated by the injector is of primary importance to mixing and hence, combustion efficiency, due to the extremely short time scale of the combustion event inside an internal combustion engine. In this respect, the aim of the fuel injection system is to atomize the fuel droplets as …
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Investigation of cluster nozzle concepts for direct injection diesel engines
… conditions. Reduction of orifice diameter, multiple injections and high pressure injection are avenues of rigorous research with the injection systems evolving rapidly. Fuel consumption and emission of PM are improved by using high pressure injection due to better air-fuel mixing while there …
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CFD Modelling of Down-Sized GDI Engines: Fuel Injection, In-Cylinder Phenomena and Correlation to Engine-Out PN Emissions
… Statistical and optimisation techniques enable spray model calibration at four representative levels of injection pressure: 35, 100, 150 and 200 bar. The results demonstrated good agreement in terms of spray tip penetration, average droplet diameter (SMD) and overall spray morphology. A Ricardo …
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Simulação da deposição de líquido e avaliação de pontas de pulverização para aplicação de herbicidas
Objetivou-se, com este trabalho, realizar a simulação da deposição de líquido e avaliação de pontas de pulverização para aplicação de herbicidas. Foram realizados quatro experimentos com o objetivo de avaliar a distribuição volumétrica e o espectro de gotas de pontas de pulverização de baixa …