Geschwindner, Christopher ; Kranz, Patrick ; Welch, Cooper ; Schmidt, Marius ; Böhm, Benjamin ; Kaiser, Sebastian A. ; Morena, Joaquin de la (2019)
Analysis of the interaction of Spray G and in-cylinder flow in two optical engines for late gasoline direct injection.
In: International Journal of Engine Research, 21 (1)
doi: 10.1177/1468087419881535
Artikel, Bibliographie
Dies ist die neueste Version dieses Eintrags.
Kurzbeschreibung (Abstract)
An investigation of the interaction between the in-cylinder flow and the spray topology in two spray-guided direct injection optical engines is reported. The bulk flow field in the combustion chamber is characterized using particle image velocimetry. Geometrical parameters such as the axial penetration and the spray angle of the liquid spray are measured using Mie scatter imaging and/or diffuse back-illumination. The measured parameters are compared with data from a constant volume chamber available in the literature. For a late injection strategy, the so-called ECN Spray G standard condition, the mean values of the spray penetration do not seem to be significantly perturbed by the in-cylinder flow motion until the plumes approach the piston surface. However, spray probability maps reveal that cycle-to-cycle fluctuations of the spatial distribution of the liquid spray are affected by the magnitude of the in-cylinder flow. Particle image velocimetry during injection shows that the flow field in the vicinity of the spray plumes is heavily influenced by air entrainment, and that an upward flow in-between spray plumes develops. Consistent with previous research that demonstrated the importance of the latter flow structure for the prevention of spray collapse, it is found that increased in-cylinder flow magnitudes due to increased intake valve lifts or engine speeds enhance the spray-shape stability. Compared with cases without injection, the influence of the spray on the in-cylinder flow field is still noticeable approximately 2.5ms after the start of injection.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2019 |
| Autor(en): | Geschwindner, Christopher ; Kranz, Patrick ; Welch, Cooper ; Schmidt, Marius ; Böhm, Benjamin ; Kaiser, Sebastian A. ; Morena, Joaquin de la |
| Art des Eintrags: | Bibliographie |
| Titel: | Analysis of the interaction of Spray G and in-cylinder flow in two optical engines for late gasoline direct injection |
| Sprache: | Englisch |
| Publikationsjahr: | 11 Oktober 2019 |
| Verlag: | Sage Publications |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | International Journal of Engine Research |
| Jahrgang/Volume einer Zeitschrift: | 21 |
| (Heft-)Nummer: | 1 |
| DOI: | 10.1177/1468087419881535 |
| URL / URN: | https://doi.org/10.1177/1468087419881535 |
| Zugehörige Links: | |
| Kurzbeschreibung (Abstract): | An investigation of the interaction between the in-cylinder flow and the spray topology in two spray-guided direct injection optical engines is reported. The bulk flow field in the combustion chamber is characterized using particle image velocimetry. Geometrical parameters such as the axial penetration and the spray angle of the liquid spray are measured using Mie scatter imaging and/or diffuse back-illumination. The measured parameters are compared with data from a constant volume chamber available in the literature. For a late injection strategy, the so-called ECN Spray G standard condition, the mean values of the spray penetration do not seem to be significantly perturbed by the in-cylinder flow motion until the plumes approach the piston surface. However, spray probability maps reveal that cycle-to-cycle fluctuations of the spatial distribution of the liquid spray are affected by the magnitude of the in-cylinder flow. Particle image velocimetry during injection shows that the flow field in the vicinity of the spray plumes is heavily influenced by air entrainment, and that an upward flow in-between spray plumes develops. Consistent with previous research that demonstrated the importance of the latter flow structure for the prevention of spray collapse, it is found that increased in-cylinder flow magnitudes due to increased intake valve lifts or engine speeds enhance the spray-shape stability. Compared with cases without injection, the influence of the spray on the in-cylinder flow field is still noticeable approximately 2.5ms after the start of injection. |
| Fachbereich(e)/-gebiet(e): | 16 Fachbereich Maschinenbau Profilbereiche Profilbereiche > Thermo-Fluids & Interfaces 16 Fachbereich Maschinenbau > Fachgebiet Reaktive Strömungen und Messtechnik (RSM) |
| Hinterlegungsdatum: | 11 Nov 2019 07:49 |
| Letzte Änderung: | 06 Dez 2023 08:08 |
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| Suche nach Titel in: | TUfind oder in Google |
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Analysis of the interaction of Spray G and in-cylinder flow in two optical engines for late gasoline direct injection. (deposited 05 Dez 2023 10:25)
- Analysis of the interaction of Spray G and in-cylinder flow in two optical engines for late gasoline direct injection. (deposited 11 Nov 2019 07:49) [Gegenwärtig angezeigt]
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