スリットノズル形状が液体噴流の微粒化に及ぼす影響

抄録

In order to improve atomization characteristics, a steady jet experiment was conducted under atmospheric pressure atmosphere using a slit nozzle simulating a jet engine in two dimensions, and the spray characteristics associated with the influence of the groove on the nozzle wall surface were investigated. In this study, a steady jet experiment is performed on the wall surface of the nozzle injection port using a nozzle without grooves, a nozzles with a vertically grooved groove, and a nozzle with grooves inclined by 4 degrees, and the width of the jet is measured from the photographed image comparison was made. Water was used as the sample liquid, and pressurization and pressure adjustment were performed using a compressor and a regulator. As a result, comparing the nozzle without groove and the nozzle with grooves, the spread of the jet became larger in the grooved nozzle. In addition, when comparing the vertically grooved nozzles with the nozzles with grooves tilted by 4 degrees, the spread of jet widened in nozzles with grooves tilted 4 degrees. From those result, it was found that atomization is promoted by processing the groove on the wall surface inside the nozzle injection port, and further atomization is promoted by angle to the groove to be processed.