1 0 0 0 OA 減圧沸騰噴霧の微粒化・蒸発過程のモデリング : 第2報,微粒化と蒸発過程のモデル解析
- 著者
- 千田 二郎 錦織 環 北條 義之 塚本 時弘 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.60, no.578, pp.3556-3562, 1994-10-25 (Released:2008-03-28)
- 参考文献数
- 23
- 被引用文献数
- 2 4
This paper presents the model analysis of atomization and vaporization process in a flash boiling spray based on the experimental results. Two kinds of liquid fuel, n-Pentane and n-Hexane, are injected into quiescent gaseous atmosphere at room temperature with low pressure through a pintle-type injector. Then, in flash boiling spray region where the back pressure is below the saturated vapor pressure of fuel, the bubble nucleation process due to flash boiling is modeled by the nucleation rate equation. Furthermore, fuel vaporization process is assessed by considering bubble growth calculations of vapor cavitation phenomena and fuel evaporation due to heat transfer process. Accordingly, we could estimate quantitatively the transient changes in bubble diameter and vapor mass fraction inside the spray for each back pressure condition.
1 0 0 0 OA 減圧沸騰噴霧の微粒化・蒸発過程のモデリング : 第1報,噴霧特性の背圧による変化
- 著者
- 千田 二郎 錦織 環 北條 義之 塚本 時弘 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.60, no.578, pp.3551-3555, 1994-10-25 (Released:2008-03-28)
- 参考文献数
- 13
- 被引用文献数
- 3
In this study, the influence of the flash boiling phenomenon on the fuel spray characteristics was in vestigated using both experiments and model analysis. Pure liquid fuel of n-Pentane or n-Hexane is injected into a vessel under quiescent gaseous atmosphere at room temperature through a pintle-type injector. Fuel sprays are observed by taking photographs for variation of ambient back pressure. In particular, changes in spray characteristics with back pressure are examined in detail. The results show that the saturated vapor pressure of fuel is the most significant factor and the spray characteristics can be varied with the pressure difference between the back pressure and saturated vapor pressure. Furthermore, flow field of the fuel inside the nozzle is estimated with regard to bubble initiation inside the film flow.