Abstract
Flow field, atomization field characteristics, and liquid film breakup behaviors of a pre-filming air-blast atomizer are investigated using PIV (Particle Imaging Velocimetry), PLIF (Fuel Planar Laser Induced Fluorescence), and high-speed shadowgraph technique under different air mass rates (ma), fuel mass rates (mf), and fuel temperatures (T). The influence of structures constituting the pre-filming air-blast atomizer on the flow field organization and atomization field organization are investigated too. The results illustrate that air-blast atomizer structures have a great difference on the flow fields and atomization fields. Air-blast atomizer structures have great differences on the liquid film breakup processes too. Flow field structure and atomization structure are mainly determined by the swirler structure, whereas there are seldom influences of air mass rate and fuel mass rate on them. The results of the mechanisms of flow field organization and atomization field organization in this study can be used to support the design of new low-emission combustor.
Highlights
Improving combustion efficiency and decreasing emission pollution are urgent needs with the increase of stringent regulations on pollutant emissions [1,2]
Pre-filming air-blast atomizers are widely applied in low-emission combustors, in which the flow field organization and the spray organization determine the combustion efficiency and emissions
Fu et al, and Colby et al studied the effects of structure parameters on the atomization and flow field characteristics, including flare geometry, confinement, and swirl angle, etc. [5,6,7,8]
Summary
Improving combustion efficiency and decreasing emission pollution are urgent needs with the increase of stringent regulations on pollutant emissions [1,2]. Pre-filming air-blast atomizers are widely applied in low-emission combustors, in which the flow field organization and the spray organization determine the combustion efficiency and emissions. Many researchers have carried out a lot of studies on the flow field, and atomization performance of pre-filming air-blast atomizers. A lot of researches have been done on the pre-filming air-blast atomizer, there are seldom studies on the influence of low fuel temperature on the flow field and atomization field. The influence of structures constituting the pre-filming air-blast atomizer on the flow field organization and atomization field organization is not clearly. The influence of structures constituting the pre-filming air-blast atomizer on the flow field organization and atomization field organization are investigated. The PIV and PLIF technologies are used to study the flow field and atomization field
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