Numerical Study of Dual Fuel Methanol/Diesel Combustion under Engine-like Condition
- Delivery
- Available on this site
- Format
- Price
- Non-members (tax incl.)：￥1,100 Members (tax incl.)：￥880
- Publication code
- 20239244
- Paper/Info type
- Other International Conferences
- Pages
- 1-11(Total 11 p)
- Date of publication
- Aug 2023
- Publisher
- JSAE & SAE
- Language
- English
- Event
- 2023 P, E&L
Detailed Information
| Category(E) | IC3 Fundamentals of Mixture Formation and Combustion |
|---|---|
| Author(E) | 1) Khanh Duc Cung, 2) Prabhat Jha, 3) Thomas Briggs, 4) Chris Bitsis, 5) Edward Mike Smith, 6) Zainal Abidin |
| Affiliation(E) | 1) Southwest Research Institute, 2) Southwest Research Institute, 3) Southwest Research Institute, 4) Southwest Research Institute, 5) Southwest Research Institute, 6) Southwest Research Institute |
| Abstract(E) | Alternative fuels such as methanol (CH3OH) can significantly reduce greenhouse gas (GHG) emissions when used in internal combustion engines (ICEs). Moreover, methanol combustion is also locally leaner than conventional diesel combustion, which can further reduce soot emissions. In this study, the combustion of methanol, methanol/diesel, and methanol/renewable diesel was characterized numerically. Methanol/renewable diesel was also investigated experimentally using a single-cylinder engine (SCE) under a dual-fuel combustion mode. Using available detailed kinetics mechanisms for different fuel (and fuel mixture) surrogates, 0D and 1D numerical studies were carried out to study the ignition event of methanol, diesel-like fuels, and imitated conditions of methanol/diesel dual fuel combustion. The 0D model suggests a shorter ignition delay with higher methanol concentration in the fuel blend, as long as the ambient temperature is higher than approximately 1050 K. However, at a temperature below 1050 K, the ignition delay becomes longer as the methanol concentration increases. This was a consistent observation for both methanol/diesel and methanol/renewable diesel mixtures. SCE experiment results indicate that the correlation between ignition delay and methanol concentration agrees, in general, with the 0D simulations. The 1D reacting spray modeling was carried out to further understand ignition characteristics, especially at high temperature (high load) conditions. It was found that, at high temperatures, an increased methanol substitution rate shortens the ignition delay by the promotion of an earlier low-temperature reaction that forms formaldehyde (CH2O). The current study provides some understanding of the ignition process in methanol/diesel and methanol/renewable diesel dual fuel combustion for advanced diesel engines. Future work will include more extensive experimental testing using the SCE combined with three-dimensional (3D) computational fluid dynamics (CFD) engine simulations to understand and optimize methanol combustion. |
