2 0 0 0 OA ガス溶解燃料を用いたディーゼル噴霧の特性 : 第1報, 窒素溶解燃料噴霧の特性
- 著者
- 千田 二郎 柴田 一郎 段 智久 藤本 元
- 出版者
- 一般社団法人 日本機械学会
- 雑誌
- 日本機械学会論文集 B編 (ISSN:03875016)
- 巻号頁・発行日
- vol.63, no.613, pp.3173-3178, 1997-09-25 (Released:2008-03-28)
- 参考文献数
- 8
- 被引用文献数
- 1 2
This study investigates the atomization mechanism of fuel spray dissolved in noncondensable gas, such as N2, CO2. The fuel spray was injected at room temperature and in an atmospheric pressure field through a diesel-hole-type nozzle. In this paper, N2 gas was dissolved into diesel fuel, n-tridecane, under several pressurized conditions using a gas bubbling method in a constant volume vessel. This fuel, with high gas solubility, was injected under several injection pressures using an accumulated injection system designed by the authors. It was found that the dissolved gas separated into gas bubbles like gas cavitation phenomena under the atmospheric field. The change in spray patterns caused by the gas solubility is discussed using photographs of the patterns.
1 0 0 0 OA 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
- 著者
- 千田 二郎 柴田 一郎 藤本 元
- 出版者
- 一般社団法人 日本機械学会
- 雑誌
- 日本機械学会論文集 B編 (ISSN:03875016)
- 巻号頁・発行日
- vol.63, no.613, pp.3179-3186, 1997-09-25 (Released:2008-03-28)
- 参考文献数
- 20
In this paper, propose a new fuel injection system using diesel fuel dissolved in liquefied CO2. The system has the capability of reducing both NOx 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.