渦巻噴射弁による噴霧の構造 : 第4報,噴霧に誘引される空気の流れ特性

概要

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Characteristics of the hollow-cone-type spray formed by a swirl atomizer are discussed. Drop diameter, drop and air velocities and directions are measured with PLDV. Fine drops less than 6μm produced by a humidifier are used as seeds to measure the air flow. In the hollow-cone-type spray, large drops fly concentrating along the sheath and entrain air due to their momentum. Air velocity shows a maximum at the center of the spray, and decreases towards the sheath. The entrained air brings smaller drops to the inside of the spray. The air flow changes direction to parallel to the axis at R/R_<sh>≒0.8. The fluctuation of drop velocities is small in the center, increases outwards and shows a maximum at R/R_<sh>≒0.8. The relative turbulent intensity of air velocity is small under R/R_<sh>≒0.8 and increases rapidly over R/R_<sh>≒0.8.
一般社団法人日本機械学会の論文
1995-06-25