衝突噴流型ジェットエンジン燃料噴射弁の噴霧粒径および噴霧分散特性(熱工学,内燃機関,動力など)

概要

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Droplet size and spray dispersion characteristics of an impingement jet type jet engine fuel injector are investigated experimentally. The fuel injector is consisted of a pintle, intermediate ring, and outer ring, forming co-axial air flow channels with co-swirlers. Compressed air at room temperature is supplied with a blower, and is injected into the atmosphere through the co-axial channels. Distilled water is supplied with a liquid pump, and is injected from hole nozzles mounted in the pintle. The number of nozzles is 8 and 16. The liquid jets impinge onto impingement walls mounted on the intermediate ring, forming a free liquid film. From the tip of the liquid film, fine droplets are formed. The droplet size is measured using an LDSA, and the spray cross section is visualized using time-average Mie scattering method. It is shown that the droplet size is almost the same as the atomization of a simple wall impingement jet, which is much smaller than that for a conventional air-blast fuel injector, and it is observed that a relatively uniform spray is formed using the fuel injector.
社団法人日本機械学会の論文
2008-10-25