Effect of pilot fuel properties on engine performance and combustion stability in a tri-fuel engine powered by premixed methane-hydrogen and diesel pilot

Loading...
Thumbnail Image
Access rights
openAccess
Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2021-10-29
Major/Subject
Mcode
Degree programme
Language
en
Pages
18
37469-37486
Series
International Journal of Hydrogen Energy, Volume 46, issue 75
Abstract
The present work investigates the effect of pilot fuel properties on TF combustion using premixed methane-hydrogen-air (CH4-H2-air) mixtures ignited by a small amount of diesel pilot. Especially, we are investigating the effect of the cetane number (CN) and aromatic content (AC) on TF combustion in a single-cylinder compression ignition (CI) engine at varying charge air temperatures (Tair = 25 °C, 40 °C, 55 °C) and H2 volume fractions (MH2 = 10%, 20%, 40% and 60%) at lean premixed charge mixture conditions (equivalence ratio φ = 0.5). The novelty and main findings of the work consist of the following features: 1) besides the effect of H2 concentration and charge-air temperature, pilot fuel properties also play a crucial role in TF combustion, even a small amount of diesel pilot could dramatically affect the engine performance and combustion stability, 2) the CN and AC are the key factors affect the ignition delay time (IDT) and indicated thermal efficiency (ITE), 3) the in-cylinder pressure oscillation analysis based on a novel Superlets (SL) approach indicates that pilot fuel properties are important to the combustion states and combustion stability.
Description
Funding Information: The present study has been financially supported by the Academy of Finland (Grant Nos. 297248 and 318024 ). The authors are thankful to Ranta Olli and Blomstedt Otto for their supports on the engine preparations. The second author has also received a scholarship from Fortum-Neste Foundation and Merenkulunsäätio under application no. 2020050 and 20210073 , respectively. Funding Information: The present study has been financially supported by the Academy of Finland (Grant Nos. 297248 and 318024). The authors are thankful to Ranta Olli and Blomstedt Otto for their supports on the engine preparations. The second author has also received a scholarship from Fortum-Neste Foundation and Merenkuluns??tio under application no. 2020050 and 20210073, respectively. Publisher Copyright: © 2021 The Author(s)
Keywords
Aromatic content, Cetane number, Fuel properties, Pilot fuel, Tri-fuel combustion
Other note
Citation
Cheng , Q , Kaario , O , Ahmad , Z , Vuorinen , V & Larmi , M 2021 , ' Effect of pilot fuel properties on engine performance and combustion stability in a tri-fuel engine powered by premixed methane-hydrogen and diesel pilot ' , International Journal of Hydrogen Energy , vol. 46 , no. 75 , pp. 37469-37486 . https://doi.org/10.1016/j.ijhydene.2021.09.053