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Atomization and Sprays
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ISSN Druckformat: 1044-5110
ISSN Online: 1936-2684

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Atomization and Sprays

DOI: 10.1615/AtomizSpr.v19.i4.10
pages 311-320

AN EXPERIMENTAL STUDY ON SPRAY TRANSIENT CHARACTERISTICS IN FUEL CONTAINING CO2

Jin Xiao
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
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
Ma Junjun
Key Laboratory of Power Machinery and Engineering, Ministry of Education, Shanghai Jiao Tong University, P.R. China
Qiao Xinqi
Key Laboratory of Power Machinery and Engineering, Ministry of Education, Shanghai Jiao Tong University, P.R. China

ABSTRAKT

Spray of fuel containing CO2 is a method of twin-fluid spray that involves dissolving CO2 gas into liquid fuel before it is ejected from the injector. The technique of dissolving CO2 gas into liquid fuel is essentially different from other methods of twin-fluid spray and leads to significant improvements in performance in terms of smaller drop sizes and lower injection pressures. This paper presents an experimental study on the process of injecting a bubble jet of transient spray with fuel containing CO2 using high-speed imaging technology. Experiments were performed under atmospheric conditions with a diesel hole-type nozzle. The effect of injection pressure on the bubble jet atomization process was evaluated, especially in the early stage of injection. The transient characteristics of spray, such as spray angle and spray tip penetration, were also investigated. The images clearly display the developing process of the spray. New insight into the process of bubble jet injection of fuel containing CO2 spray was obtained, and a possible mechanism to explain the phenomena was proposed.