非定常噴霧の構造に関する研究 : 第1報,シリコンオイル粒子散乱法による燃料蒸気の可視化 (小特集エンジンシステム)

概要

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A new technique for visualizing the vapor concentration in an evaporating spray, called silicone-particle scattering imaging (S. S. I. ), was proposed. When the fuel mixture containing silicone oil as 1% mass fraction was injected into a nitrogen environment at a temperature of 640 K, the volatile base fuel in the droplets vaporized rapidly leaving behind small droplets of silicone oil suspended in the vapor-gas mixture. The residual silicone oil droplets were illuminated by a thin laser sheet, and scattered light was imaged by a still camera. A simultaneous comparison between the scattering image and the fluorescence image in a cross section of an evaporating spray showed that the residual silicone oil droplets in an evaporating spray approximately represent the fuel vapor concentration. Using the S. S. I. method, the difference between the inhomogeneous structures of evaporating and nonevaporating sprays was investigated.
一般社団法人日本機械学会の論文
1993-03-25