Sökning: "Ballistic imaging"
Visar resultat 1 - 5 av 6 avhandlingar innehållade orden Ballistic imaging.
1. Ballistic Imaging of Transient Phenomena in Turbid Media
Sammanfattning : Ballistic imaging (BI) was developed as an optical diagnostic capable of ascertaining velocity and spatial information within dense sprays with relevance to liquid-fuel injection and combustion. This development includes a full model of light scattering within the complete imaging system, enabling the performance of the instrument to be examined, optimized and quantified. LÄS MER
2. Temporally gated imaging for investigation of atomizing sprays
Sammanfattning : Fuel sprays play an important role in the combustion process of modern compression ignition engines, but their dynamics are not well understood. This thesis focuses on time-gated imaging techniques as a means to study the optically dense spray formation region of these atomizing sprays. LÄS MER
3. Advances in Time-gated Ballistic Imaging for Studies of Atomizing Fuel Sprays
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
4. Development and application of laser diagnostics - from laboratory devices towards practical combustion engines
Sammanfattning : For many decades, research work on combustion has been focused on improving combustion efficiency and reducing harmful emissions. Laser diagnostics is one of the best ways to investigate the combustion process and emission formation as it is non-intrusive and it has high spatiotemporal resolution. LÄS MER
5. Measurement and evaluation of near-field spray kinematics for nozzles with asymmetrical inlet geometries
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