Pressure-based ignition delay times of turbulent spray combustion of n-dodecane fuel were studied using two turbulence models: Large Eddy Simulations (LES) of turbulence and Reynolds Averaged Navier Stokes (RANS). Standard RNG k-ε and Dynamic Structure models were utilized for RANS and LES turbulence modeling respectively. The simulated combustion chamber pressure rise, lift-off length, liquid penetration, and vapor penetration were compared with experimental data. The combustion chamber initial gas temperatures ranged from 850 K to 1200 K at an initial gas density of 22.8 kg/m3. A recently developed skeletal mechanism of n-dodecane with 85 species was utilized in the current work. The pressure-based ignition delay times using the Dynamic Structure turbulence model were well matched with experimental data, but the simulated pressure-based ignition delay time was over-predicted using RNG k-ε model at initial combustion chamber temperature of 850 K. The flame lift-off length, spray structure and species production and consumption histories were also investigated using different models. Both turbulence models show similar spray lift-off length at time of luminosity-based ignition delay at various combustion chamber temperatures.
- Internal Combustion Engine Division
Pressure-Based Ignition Delay Times of Non-Premixed Turbulent Jet Flames Using Various Turbulence Models
- Views Icon Views
- Share Icon Share
- Search Site
Samimi Abianeh, O, Levins, M, & Chen, CP. "Pressure-Based Ignition Delay Times of Non-Premixed Turbulent Jet Flames Using Various Turbulence Models." Proceedings of the ASME 2016 Internal Combustion Engine Division Fall Technical Conference. ASME 2016 Internal Combustion Engine Division Fall Technical Conference. Greenville, South Carolina, USA. October 9–12, 2016. V001T06A002. ASME. https://doi.org/10.1115/ICEF2016-9307
Download citation file: