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Cycle-Resolved Evaluation of Directly Injected Methane Using a High-Speed Laser-Induced Fluorescence Measurement System

Titelangaben

Geiger, Mirko ; Zöllner, Christian ; Brüggemann, Dieter:
Cycle-Resolved Evaluation of Directly Injected Methane Using a High-Speed Laser-Induced Fluorescence Measurement System.
2020
Veranstaltung: SAE Powertrains, Fuels & Lubricants Digit Summit , 15.09.2020 , Online.
(Veranstaltungsbeitrag: Kongress/Konferenz/Symposium/Tagung , Paper )
DOI: https://doi.org/10.4271/2020-01-2106

Abstract

The usage of alternative fuels inside internal combustion engines (ICE), is one promising approach to meet the higher requirements concerning the efficiency and emission of modern combustion systems. The injection and mixture formation of such fuels has a major impact on the subsequent combustion as well as the formation of pollutants. To rate the influence and to gain a better understanding of those new alternatives a basic understanding of these dominant processes is mandatory. The principle of laser-induced fluorescence (LIF) is a well-known method to display and evaluate fuel distributions inside combustion chambers. A suiting online calibration routine allows the visualization of air-fuel equivalence ratio (λ) two-dimensionally during different operation modes. As cyclic variations can become a more critical issue while using alternative fuels, cycle- resolved test series become more and more important. To obtain several crank-angle-resolved measurements during one cycle as well as comparisons from cycle to cycle is crucial to understand the ongoing processes inside ICE for further improvements in research and development. Therefore, this study describes the development and application of a new optical measurement system to record the λ-distribution quantitatively with high spatial and temporal resolution inside an optically accessible single cylinder research engine. Based on a BMW diesel engine, the experimental apparatus is modified to inject gaseous methane directly into the cylinder using a HDEV4-based 8-hole valve. A variation of operation parameters, such as engine speed, injection pressure and injection timing, is conducted while the fuel distribution is recorded along the spray propagation. Corrections for the light sheet shape as well as pulse to pulse energy fluctuations of the laser pulses complement the High-Speed LIF-system with repetition rates up to 3 kHz using a single Nd:YAG-laser.

Weitere Angaben

Publikationsform: Veranstaltungsbeitrag (Paper)
Begutachteter Beitrag: Ja
Zusätzliche Informationen: SAE Technical Paper 2020-01-2106
Institutionen der Universität: Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Technische Thermodynamik und Transportprozesse
Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Technische Thermodynamik und Transportprozesse > Lehrstuhl Technische Thermodynamik und Transportprozesse - Univ.-Prof. Dr.-Ing. Dieter Brüggemann
Profilfelder > Emerging Fields > Energieforschung und Energietechnologie
Forschungseinrichtungen > Forschungsstellen > BERC - Bayreuth Engine Research Center
Fakultäten
Fakultäten > Fakultät für Ingenieurwissenschaften
Profilfelder
Profilfelder > Emerging Fields
Forschungseinrichtungen
Forschungseinrichtungen > Forschungsstellen
Titel an der UBT entstanden: Ja
Themengebiete aus DDC: 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften
Eingestellt am: 15 Sep 2020 07:28
Letzte Änderung: 15 Sep 2020 07:28
URI: https://eref.uni-bayreuth.de/id/eprint/57233