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        Spray development process of aviation fuel using a low-pressure fuel injector: Visualization and analysis

        Rami Zakaria,Peter Bryanston-Cross,Brenda Timmerman 대한기계학회 2014 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.28 No.12

        A laser sheet digital imaging system was developed to visualize and characterize aviation fuel sprays through the use of a highresolutioncamera and a pulsed laser. Image processing and particle image velocimetry (PIV) were employed to investigate the spraydevelopment process during an individual injection pulse. The experimental setup of the visualization system and the results of sprayanalysis were presented at both macroscopic and microscopic scales. Experiments were conducted with low line pressure (i.e., less than 5bar) in still air through short injection pulses. The variation in spray velocity distribution was observed by producing spray PIV at severalstages of the injection pulse period. A long-range microscope was utilized to provide a close-up view of the micro-droplets, which are 5-100 μm in diameter. Velocity vector fields of the small droplets were produced by applying micro-PIV tracking technique and acquiringa large number of double-exposure shadowgraph images for several test points.

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