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Atomization and Sprays

Publication de 12  numéros par an

ISSN Imprimer: 1044-5110

ISSN En ligne: 1936-2684

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EFFECT OF INJECTION PRESSURE ON SPRAY CHARACTERISTICS AND FUEL DISTRIBUTION IN DIESEL ENGINE CONDITIONS BY PLANAR LASER-INDUCED EXCIPLEX FLUORESCENCE (PLIEF) TECHNOLOGY

Volume 18, Numéro 8, 2008, pp. 761-779
DOI: 10.1615/AtomizSpr.v18.i8.50
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RÉSUMÉ

The effects of injection pressure on liquid and vapor phase spray characteristics at different injection timings under ultrahigh injection pressure (≥160 MPa) were studied by using a planar laser-induced exciplex fluorescence technology in an optically accessible single-cylinder direct injection diesel engine. The injection pressure was changed from 160 MPa to 220 MPa, and the injection timing covered 42° CA to −6° CA of crank angle before top dead center. Results reveal that the ultrahigh injection pressure, which is higher than 160 MPa, can significantly promote spray atomization and evaporation and results in an increase of vapor phase percentage. The inhomogeneity (estimated by the standard deviation of the normalized fluorescence intensity) is improved as injection pressure is increased from 160 MPa to 220 MPa, but the improvement varies clearly with injection timing. It is also revealed that both liquid and vapor phase sprays can be fully developed when Ld0 ≥ 90, where L is penetration and d0 is orifice diameter, at the experimental injection pressure, which is much less than that observed in previous work at lower injection pressures.

CITÉ PAR
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  3. Lin Tay Kun, Yu Wenbin, Zhao Feiyang, Yang Wenming, From fundamental study to practical application of kerosene in compression ignition engines: An experimental and modeling review, Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, 234, 2-3, 2020. Crossref

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