Spray characterisation of diesel using a hybrid atomizer

Garai, Amlan; Gangopadhyay, Tryambak; Mukhopadhyay, Achintya; Sen, Swarnendu

doi:10.1007/s12046-023-02200-5

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2024

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“…At higher injection pressures, droplets broke up more rapidly in the downstream zone, leading to wider spray dispersion [8,9]. Garai et al [10] studied the microscopic characteristics of a diesel spray using a hybrid atomizer. They employed particle droplet image analysis (PDIA) to measure the Sauter mean diameter (SMD).…”

Section: Introductionmentioning

confidence: 99%

Microscopic Imaging on Diesel Spray and Atomization Process

El Marnissi,

Hwang

2024

Processes

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Improving diesel engine performance requires a comprehensive understanding of fuel atomization and air–fuel mixing within the combustion chamber. Numerous studies have been conducted to reduce emissions and enhance diesel engines. However, further investigation is required on the detailed diesel spray process. In this study, we adopted extinction measurement to analyze the effects of a fuel injection pressure range of 300 to 700 bar on spray morphology. For the extinction imaging setup, we utilized a high-intensity continuous LED source along with a diffuser to ensure uniform light distribution. The high-speed extinction and image processing results indicate that increasing the injection pressure from 300 to 700 bar effectively produced a smaller particulate size (15% reduction) and a better air–fuel mixing process. Especially at the end of injection, our results show smaller liquid ligaments (50% reduction) and droplets around the injector tip with higher injection pressure cases.

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Section: Introductionmentioning

confidence: 99%