Welch, Cooper ; Illmann, Lars ; Schmidt, Marius ; Böhm, Benjamin (2025)
Experimental characterization of the turbulent intake jet in an engine flow bench.
In: Experiments in Fluids : Experimental Methods and their Applications to Fluid Flow, 2023, 64 (5)
doi: 10.26083/tuprints-00028399
Artikel, Zweitveröffentlichung, Verlagsversion
 | Es ist eine neuere Version dieses Eintrags verfügbar. |
Kurzbeschreibung (Abstract)
The turbulent intake flow of an optically accessible internal combustion engine is modeled using an air flow bench to reduce the complexity in the number of variables inherent within engine flows. By removing the piston and introducing a new optically accessible housing and outlet channel, the flow bench design simulates engine flows in the region just downstream of the intake valves and offers the possibility to measure and calculate quantities that would be difficult or impossible to obtain in the unsteady environment of a dynamic engine. Velocity data obtained via high-speed particle image velocimetry of the flow bench in the symmetry and valve planes are compared with data from a base operating condition of the motored engine at an intake pressure of 0.95 bar and a speed of 800 rpm at -270°CA (270 crank-angle-degrees before compression top dead center), beginning with stationary valves at the corresponding valve lift of -270°CA, then with moving valves. Analysis of the intake jet turbulence for increasing mass flow rates reveals a coherent flapping of the jet at a frequency of 752.5 Hz for only the 100% mass flow rate case. The vortex shedding frequency of the valve stem is estimated to being in the range of 634–799 Hz, indicating a possible link between the coherent jet flapping and the vortex shedding surviving the acceleration through the valve gap. Through comprehensive analysis, this study provides valuable validation data and insight into the intake flows of internal combustion engines.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2025 |
| Autor(en): | Welch, Cooper ; Illmann, Lars ; Schmidt, Marius ; Böhm, Benjamin |
| Art des Eintrags: | Zweitveröffentlichung |
| Titel: | Experimental characterization of the turbulent intake jet in an engine flow bench |
| Sprache: | Englisch |
| Publikationsjahr: | 16 Januar 2025 |
| Ort: | Darmstadt |
| Publikationsdatum der Erstveröffentlichung: | Mai 2023 |
| Ort der Erstveröffentlichung: | Berlin ; Heidelberg |
| Verlag: | Springer |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Experiments in Fluids : Experimental Methods and their Applications to Fluid Flow |
| Jahrgang/Volume einer Zeitschrift: | 64 |
| (Heft-)Nummer: | 5 |
| Kollation: | 19 Seiten |
| DOI: | 10.26083/tuprints-00028399 |
| URL / URN: | https://tuprints.ulb.tu-darmstadt.de/28399 |
| Zugehörige Links: | |
| Herkunft: | Zweitveröffentlichung DeepGreen |
| Kurzbeschreibung (Abstract): | The turbulent intake flow of an optically accessible internal combustion engine is modeled using an air flow bench to reduce the complexity in the number of variables inherent within engine flows. By removing the piston and introducing a new optically accessible housing and outlet channel, the flow bench design simulates engine flows in the region just downstream of the intake valves and offers the possibility to measure and calculate quantities that would be difficult or impossible to obtain in the unsteady environment of a dynamic engine. Velocity data obtained via high-speed particle image velocimetry of the flow bench in the symmetry and valve planes are compared with data from a base operating condition of the motored engine at an intake pressure of 0.95 bar and a speed of 800 rpm at -270°CA (270 crank-angle-degrees before compression top dead center), beginning with stationary valves at the corresponding valve lift of -270°CA, then with moving valves. Analysis of the intake jet turbulence for increasing mass flow rates reveals a coherent flapping of the jet at a frequency of 752.5 Hz for only the 100% mass flow rate case. The vortex shedding frequency of the valve stem is estimated to being in the range of 634–799 Hz, indicating a possible link between the coherent jet flapping and the vortex shedding surviving the acceleration through the valve gap. Through comprehensive analysis, this study provides valuable validation data and insight into the intake flows of internal combustion engines. |
| ID-Nummer: | Artikel-ID: 91 |
| Status: | Verlagsversion |
| URN: | urn:nbn:de:tuda-tuprints-283994 |
| Sachgruppe der Dewey Dezimalklassifikatin (DDC): | 500 Naturwissenschaften und Mathematik > 530 Physik 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften und Maschinenbau |
| Fachbereich(e)/-gebiet(e): | 16 Fachbereich Maschinenbau DFG-Sonderforschungsbereiche (inkl. Transregio) DFG-Sonderforschungsbereiche (inkl. Transregio) > Transregios DFG-Sonderforschungsbereiche (inkl. Transregio) > Transregios > TRR 150 Turbulent chemisch reagierende Mehrphasenströmungen in Wandnähe 16 Fachbereich Maschinenbau > Fachgebiet Reaktive Strömungen und Messtechnik (RSM) |
| Hinterlegungsdatum: | 16 Jan 2025 14:13 |
| Letzte Änderung: | 17 Jan 2025 16:10 |
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| Suche nach Titel in: | TUfind oder in Google |
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- Experimental characterization of the turbulent intake jet in an engine flow bench. (deposited 16 Jan 2025 14:13) [Gegenwärtig angezeigt]
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