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Evaluation of the combustion process of directly injected methane in a rapid compression machine with a laser-based ignition system and an electrical ignition system

Title data

Schröder, Lukas ; Hillenbrand, Thomas ; Brüggemann, Dieter:
Evaluation of the combustion process of directly injected methane in a rapid compression machine with a laser-based ignition system and an electrical ignition system.
In: Energy. Vol. 289 (2024) . - 129940.
ISSN 1873-6785
DOI: https://doi.org/10.1016/j.energy.2023.129940

Abstract in another language

In order to reduce exhaust gas emissions, the application of lean operation in internal combustion engines has great potential. Experiments have been carried out in a rapid compression machine with directly injected methane comparing two laser ignition systems based on Nd:YAG lasers with an electrical ignition system. Three stratified extremely lean mixtures are ignited with up to 3 consecutive ignition pulses. This application-oriented investigation with the novel approach of combining laser ignition with a stratified charge in a rapid compression machine provides essential insights into the combustion process. The results highlight the advantages of laser ignition systems. The maximum pressure is increased by up to 9.5 %. The indicated work is increased by up to 16 % and cyclic variations are reduced by up to 35 %. The advantages increase as the mixture becomes leaner. A positive influence of multiple pulses can be observed as the ignition probability and the cyclic variations improve by up to 20 % per pulse and 25 % per pulse, respectively for the laser ignition. The evaluation shows that shorter pulse durations with a higher power achieve improved values for successful ignitions while longer pulses and a higher pulse energy achieve higher ignition probability values.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties > Faculty of Engineering Science > Chair Engineering Thermodynamics and Transport Processes
Profile Fields > Emerging Fields > Energy Research and Energy Technology
Result of work at the UBT: Yes
DDC Subjects: 600 Technology, medicine, applied sciences > 620 Engineering
Date Deposited: 21 Feb 2024 11:18
Last Modified: 21 Feb 2024 11:18
URI: https://eref.uni-bayreuth.de/id/eprint/88660