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雾化与喷雾
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ISSN 打印: 1044-5110
ISSN 在线: 1936-2684

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雾化与喷雾

DOI: 10.1615/AtomizSpr.v4.i3.10
pages 253-262

ATOMIZATION BEHAVIOR OF FUEL CONTAINING DISSOLVED GAS

Zhen Huang
Key Laboratory of Power Machinery and Engineering, Ministry of Education, Shanghai Jiao Tong University, No. 800, Dongchuan Road, Minhang District, 200240 Shanghai, People's Republic of China
Shao Yiming
Department of Mechanical Engineering, Chongqing Institute of Communications, Chongqing, P.R. China
Siichi 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

ABSTRACT

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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