ガス溶解燃料を用いたディーゼル噴霧の特性 : 第2報, 液化CO₂混合燃料噴霧の特性

抄録

In this paper, propose a new fuel injection system using diesel fuel dissolved in liquefied CO₂. The system has the capability of reducing both NO_x and soot simultaneously. This concept strives to improve the atomization of fuel spray by flash boiling liquefied CO₂ gas. Moreover, it is possible to control the combustion system, for instance, and internal EGR effect is produced by the separated CO₂ gas. In this paper, the characteristics of diesel spray of the fuel dissolved with liquefied CO₂ were investigated using several optical measurements and the variance of CO₂ molar fraction, ambient pressure and ambient density under room-temperature conditions. The spray characteristics were revealed using analysis in chemical thermodynamics. The atomization and dispersion of a free spray composed of fuel dissolved in liquefied CO₂ are much better than those of normal diesel fuel oil, due to the flash boiling process in the relatively low pressure field.