An experimental study of diesel spray impingement on a flat plate: Effects of injection conditions

Document Type

Conference Proceeding

Publication Date

7-18-2017

Department

Department of Mechanical Engineering-Engineering Mechanics

Abstract

Advanced injection strategies for internal combustion engines have been extensively studied although there stillexists a significant fundamental knowledge gap on the mechanism for high-pressure spray interaction with the piston surface and chamber wall in the internal combustion engine. The current study focuses on providing qualitative and quantitative information on spray-wall impingement and its characteristics by expanding the range of operating parameters under engine-like conditions. Parameters considered in the experiment are ambient gas and fuel injection conditions. The test included the non-vaporizing spray at the different ambient density (14.8, 22.8 and 30 kg/m3) and injection pressure (1200, 1500 and 1800 bar) with the isothermal condition (ambient, and plate temperatures of 423 K). The test was conducted in the constant-volume vessel with the 60-degree impinging spray angle relative to the plate. The free spray and impinged spray properties were qualitatively analysed based on Mie and schlieren images. The results showed that the lower ambient density and higher injection pressure tended to result in relatively higher impinged spray height. The expanding shape of the impinged spray on the wall showedthe oval shape.

Publisher's Statement

© 2017. Publisher’s version of record: https://doi.org/10.4995/ilass2017.2017.4733

Publication Title

ILASS–Europe 2017, 28th Conference on Liquid Atomization and Spray Systems,

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