Atomization and Sprays Journal of the International Institutes for Liquid Atomization and Spray Systems

ISSN for PRINT: 1045-5110

For Online Access

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1994, Volume4

Issue 3

118 pages

Issue price - $75.00

Huang Zhen
Shanghai Jiao Tong University

Shao Yiming
Department of Mechanical Engineering, Chongqing Institute of Communications, Chongqing, P.R. China

Seiichi Shiga
Department of Mechanical Engineering, Faculty of Engineering, Gunma University, Gunma, Japan

Hisao Nakamura
Department of Mechanical Engineering, Faculty of Engineering, Gunma University, Gunma, Japan

Takao Karasawa
Department of Mechanical Engineering, Faculty of Engineering, Gunma University, Gunma, Japan

Tamotsu Nagasaka
Department of Mechanical Engineering, Gunma University, Kiryu, Gunma 376, Japan

This article presents a study of the atomization behavior of a steady spray of fuel containing dissolved gas. Using diesel fuel containing dissolved CO₂ and air, experiments were performed under atmospheric conditions on a diesel hole-type nozzle and simple nozzles. The atomization process and spray characteristics were observed and measured by instantaneous shadowgraphy and LDSA (an optical technique based on a narrow-angle forward-scattering theory), respectively. The effects of the concentration of dissolved gas, the injection pressure, and the nozzle L/D ratio were examined. The results show that: (1) the injection of fuel containing dissolved gas (IFCDG) can greatly improve the atomization and produce a parabolic-shaped spray; and (2) in terms of atomization, there exist two completely contrary effects of the IFCDG. The beneficial effect of the IFCDG is obtained at a gas concentration above the transition and in the region of larger nozzle L/D ratio.

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