Impact of Impinging Distance on Diesel Spray Characteristics

被引：0
|
作者：
Mao L. [1 ,2 ]
Su W. [1 ]
Pei Y. [1 ]
机构：
[1] State Key Laboratory of Engines, Tianjin University, Tianjin
[2] School of Transportation, Ludong University, Yantai
来源：
Neiranji Xuebao/Transactions of CSICE (Chinese Society for Internal Combustion Engines) | 2019年 / 37卷 / 04期
关键词：
Diesel engine; Diesel spray; Fuel distribution; Impinging distance; Planar laser induced exciplex fluorescence(PLIEF);
D O I：
10.16236/j.cnki.nrjxb.201904038
中图分类号：
学科分类号：
摘要：
The planar laser induced exciplex fluorescence(PLIEF)technique was used to quantitatively study the fuel distribution of diesel spray flat wall impingements in a constant volume combustion vessel. In the experiment, the impinging distance was changed from 12.5 mm to 32.5 mm. It is found that the impinging distance have an important impact on the fuel distribution. With an increase in impinging distance, the mass fraction of liquid phase fuel increases, while the mass fraction of vapor phase fuel decreases in the excessively rich mixture area of φ>2. In the richer mixture area of 1<φ≤2, the mass fraction of vapor phase fuel still increases with the increase of impinging distance until to a certain value and then keep unchanged. In the lean mixture area of 0<φ≤1, it still gradually increase with the increases of the impinging distance. In addition, the transient maximum equivalent ratio(φmax)decreases and the transient minimum temperature(Tmin)increases. The wall jet radius and height of the vapor-liquid phase spray decreases, or even does not impinge on the wall. © 2019, Editorial Office of the Transaction of CSICE. All right reserved.
引用
收藏
页码：289 / 296
页数：7
相关论文
共 12 条
  • [1] Katsura N., Saito M., Senda J., Et al., Characteristics of a diesel spray impinging on a flat wall, (1989)
  • [2] Fujimoto H., Nagae M., Ha Simoto A., Et al., Characteristics of a diesel spray impinging on a flat wall, International Symposium COMODIA, pp. 193-198, (1990)
  • [3] Melton L.A., Spectrally separated fluorescence emissions for diesel fuel droplets and vapor, Applied Optical, 22, pp. 2224-2226, (1983)
  • [4] Felton P., Bracco F., Bardsley M., On the quantitative application of exciplex fluorescence to engine sprays, (1993)
  • [5] Yeh C.N., Kamimoto T., Kobori S., Et al., Quantitative measurement of 2-D fuel vapor concentration in a transient spray via laser-induced fluorescence technique, (1994)
  • [6] Senda J., Kanda T., Quantitative analysis of fuel vapor concentration in diesel spray by exciplex fluorescence method, (1997)
  • [7] Kim T., Quantitative 2-D fuel vapor concentration measurements in an evaporating diesel spray using the exciplex fluorescence method, (2001)
  • [8] Kim T., Ghandhy J.B., Quantitative vapor phase exciplex fluorescence measurements at high ambient temperature and pressure, KSME International Journal, 17, pp. 157-167, (2003)
  • [9] Kim T., Beckman M.S., Farrell P.V., Et al., Evaporating spray concentration measurements from small and medium bore diesel injectors, (2002)
  • [10] Kim J.U., Hong H., Quantitative vapour-liquid visualization using laser-induced exciplex fluorescence, Journal Optics A: Pure and Applied Optics, 3, pp. 338-345
12