8th International Conference on Renewable Fuels, Combustion and Fire (FCE’21), Ankara, Türkiye, 5 - 07 Mart 2021, cilt.1, ss.275-280
Petroleum-based fuels play a significant role in the fields of industrial growth, transportation and agriculture due to their availability, combustion properties and high heating value. In this study, numerical investigation of combustion performance and emissions of a diesel engine was conducted. Model was used 3D CFD software AVL-Fire, which is thermo-fluid dynamics software, and it uses a pressure based segregated solution algorithm. The k-zeta-f turbulence model is used as turbulence equation. The FIRE Coherent Flame Model (ECFM) has been implemented and tested for homogeneously premixed turbulent combustion in SI engines and can also be used for non-premixed combustion applications. So CFM was choosen for combustion model. Extended Zeldovich model was chosen as a NOx model. Turbulence Dispersion model based on work of O’Rourke. Wave model was chosen as a Breakup model. Injection timing start degree was firstly chosen 20o BTDC (340 CA). At further working, this value changed as 300, 310, 320, 330 CA. Two different injection duration (0.8 ms and 1 ms) were used for all start of injections in numerical study. When the pressure, temperature, efficiency and emission parameters were examined, the most suitable values were obtained for SOI 330 and 0.8 ms injection duration.