每年出版 12 期
ISSN 打印: 1044-5110
ISSN 在线: 1936-2684
Indexed in
EXPERIMENTAL STUDY OF THE EFFECTS OF CARBON DIOXIDE CONCENTRATION IN DIESEL FUEL ON SPRAY CHARACTERISTICS
摘要
Injection of fuel containing CO2 has potential to reduce NOx and soot emissions in a diesel engine. The gas is dissolved into fuel prior to injection. This paper presents an experimental study on the spray characteristics of fuel containing CO2 as measured by phase Doppler anemometry. Experiments were performed under atmospheric conditions on diesel hole-type nozzles at constant injection pressure. Effects of CO2 concentration in diesel fuel on the spray pattern, droplet size, and velocity were measured. Experimental results show that fuel atomization will improve greatly when the concentration of dissolved CO2 in the fuel exceeds the critical value. The axial and radial velocities of the fuel spray containing CO2 is larger than that of conventional diesel fuel spray near the nozzle exit due to explosive flashing phenomena. Downstream of the spray, the radial velocity and droplet size of fuel containing CO2 is much more uniform and smaller than that of pure diesel spray. It is attributed to the greatly enhanced liquid-gas mixing resulting from flash separation of CO2 from the liquid. New insight into the atomization of fuel containing CO2 was obtained and a possible mechanism to explain the phenomena was proposed.
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Ju Dehao, Jia Xiaoxu, Huang Zhong, Qiao Xinqi, Xiao Jin, Huang Zhen, Comparison of atomization characteristics of model exhaust gas dissolved diesel and gasoline, Fuel, 182, 2016. Crossref
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Min Se Hun, Suh Hyun Kyu, Fuel Droplet Behavior in a Cylinder under the Difference Co2 Mole Fraction Conditions Controlled by Simulated-EGR in CI Engine, International Journal of Automotive Technology, 23, 1, 2022. Crossref