Stereoscopic particle image velocimetry for engine flow measurements: Principles and applications

There is an upsurge in the drive for better understanding of the processes, which control the combustion in modern engines. Large-scale intake generated flow structures, such as swirl and tumble, are known to have a significant effect on the combustion behaviour and have been widely studied by the automotive research community. Traditionally, the standard tools available to assess the in-cylinder flow behaviour inside an engine are either steady-state flow rigs or research engines with optical access. Steady-state flow rigs are used to evaluate the bulk motion using some integral parameters. Whilst the optical measurements are used to investigate detailed in-cylinder flow conditions. To assess the recent developments, principles and applications of stereoscopic particle image velocimetry to engine flow measurements are presented and discussed. (C) 2021 THE AUTHORS. Published by Elsevier BV on behalf of Faculty of Engineering, Alexandria University. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/ licenses/by-nc-nd/4.0/).

Automated summary

There is an increasing demand for better understanding of the combustion processes in modern engines, with large-scale intake generated flow structures having a significant effect on combustion behavior and being widely studied. Traditional tools for assessing in-cylinder flow behavior include steady-state flow rigs and research engines with optical access. Recent developments in stereoscopic particle image velocimetry for engine flow measurements are presented and discussed.