DME-Propane Autoignition Measurements inside a Shock Tube

Conference · Thu Jan 04 00:00:00 EST 2024

DOI:https://doi.org/10.2514/6.2024-0220· OSTI ID:3022771

Mohammed, Zuhayr Pasha ^[1]; Urso, Justin ^[1]; Khaleel Rahman, Ramees ^[1]; Dennis, Christopher W. ^[1]; Pierro, Michael ^[1]; Vasu, Subith ^[1]

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1. University of Central Florida

Dimethyl ether (DME) is a biofuel that has the potential to replace diesel in heavy-duty engines. A blend of propane (C3H8) and DME could reduce emissions when compared to diesel at heavy-duty compression engine-relevant conditions. Testing a potential new mixture in a compression engine requires a high-fidelity chemical kinetics model that accurately predicts autoignition delay times, which is especially necessary for a compression engine. In this work, autoignition data has been gathered at an equivalence ratio of 2.0 for pressures of 60 and 80 bar. DME and propane were combusted in synthetic air while excited hydroxyl (OH*) chemiluminescence was used to gather ignition delay times. Data was compared to recent chemical kinetic mechanisms for the two different pressures. Using the mechanism with the best fit of autoignition data, a sensitivity analysis was conducted to analyze the chemical kinetics of the DME/C3H8 combustion at elevated pressures.

• Research Organization: University of Central Florida
• Sponsoring Organization: USDOE Office of Energy Efficiency and Renewable Energy (EERE)
• DOE Contract Number: EE0009879
• OSTI ID: 3022771
• Resource Type: Conference paper
• Conference Information: AIAA SCITECH 2024 Forum (Orlando, FL)
• Country of Publication: United States
• Language: English