Welch, Cooper ; Illmann, Lars ; Schmidt, Marius ; Dreizler, Andreas ; Böhm, Benjamin (2023)
Experimental evaluation of spark behavior under diluted conditions in an optically accessible engine.
In: International Journal of Engine Research
doi: 10.1177/14680874231197492
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
An optically accessible single-cylinder spark-ignition engine operated under homogeneous, part-load conditions is experimentally investigated using optical and spark diagnostics to evaluate the relationship between the spark, flow, and flame with increasing dilution using several levels of exhaust gas recirculation (EGR). Voltage and current measurements of the secondary spark circuit are compared with simultaneous high-speed spark plasma imaging, particle image velocimetry measurements of the flow field, and burned gas images. Specifically, characteristic restrike cycles and normal cycles are examined under the 0% EGR and 12:9% EGR conditions to reveal a relationship between the magnitude and direction of the velocity near the spark plug and the spark’s behavior coupled with that of the subsequent flame propagation. Through the use of conditional statistics and correlation analysis of data sets of all non-restrike and all restrike cycles, the horizontal velocity across the spark gap was identified as a critical quantity in facilitating more stable and faster combustion under diluted mixture conditions.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2023 |
| Autor(en): | Welch, Cooper ; Illmann, Lars ; Schmidt, Marius ; Dreizler, Andreas ; Böhm, Benjamin |
| Art des Eintrags: | Bibliographie |
| Titel: | Experimental evaluation of spark behavior under diluted conditions in an optically accessible engine |
| Sprache: | Englisch |
| Publikationsjahr: | 10 August 2023 |
| Verlag: | Sage Publications |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | International Journal of Engine Research |
| DOI: | 10.1177/14680874231197492 |
| URL / URN: | https://journals.sagepub.com/doi/10.1177/14680874231197492 |
| Kurzbeschreibung (Abstract): | An optically accessible single-cylinder spark-ignition engine operated under homogeneous, part-load conditions is experimentally investigated using optical and spark diagnostics to evaluate the relationship between the spark, flow, and flame with increasing dilution using several levels of exhaust gas recirculation (EGR). Voltage and current measurements of the secondary spark circuit are compared with simultaneous high-speed spark plasma imaging, particle image velocimetry measurements of the flow field, and burned gas images. Specifically, characteristic restrike cycles and normal cycles are examined under the 0% EGR and 12:9% EGR conditions to reveal a relationship between the magnitude and direction of the velocity near the spark plug and the spark’s behavior coupled with that of the subsequent flame propagation. Through the use of conditional statistics and correlation analysis of data sets of all non-restrike and all restrike cycles, the horizontal velocity across the spark gap was identified as a critical quantity in facilitating more stable and faster combustion under diluted mixture conditions. |
| Fachbereich(e)/-gebiet(e): | 16 Fachbereich Maschinenbau 16 Fachbereich Maschinenbau > Fachgebiet Reaktive Strömungen und Messtechnik (RSM) |
| Hinterlegungsdatum: | 11 Dez 2023 07:44 |
| Letzte Änderung: | 11 Dez 2023 07:44 |
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