| Full text | |
| Author(s): |
Placido, Paulo Vitor Ribeiro
;
Alviso, Dario
;
Goncalves dos Santos, Rogerio
Total Authors: 3
|
| Document type: | Journal article |
| Source: | COMBUSTION SCIENCE AND TECHNOLOGY; v. N/A, p. 27-pg., 2024-05-06. |
| Abstract | |
Efforts to combat the harmful effects of vehicle emissions on our environment and health include exhaust emissions and fuel efficiency regulations. One promising solution is direct fuel injection in supercritical conditions, where the fuel mixture is above critical temperature and pressure. This study presents a reduced kinetics mechanism (129 species and 1015 reactions) utilizing real gas equations to simulate the combustion of supercritical/transcritical gasoline surrogate/ethanol blends. It was developed by combining two reduced models - a Toluene reference fuel (TRF) with a Diisobutylene (DIB) and an ethanol model - and validated through simulations of ignition delay time (IDT). The Arrhenius parameters of key reactions for each fuel component were modified to improve accuracy. An adjusted Redlich-Kwong cubic state equation was employed to segregate each surrogate mixture tested as supercritical, transcritical, or subcritical. The new mechanism was then validated against experimental results using high-pressure conditions and the cubic Peng-Robinson and Redlich-Kwong equation of state parameters. Critical properties of each species were obtained through Joback's Group Method and the Ambrose-Walton vapor pressure equation. The TRF/DIB/E mechanism results were consistent with shock tube experimental data at high pressure, indicating a potential for modeling combustion in ultra-high pressure direct injection engines. (AU) | |
| FAPESP's process: | 23/05419-1 - Virtual chemistry methodology applied to biofuels and supercritical combustion |
| Grantee: | Rogério Gonçalves dos Santos |
| Support Opportunities: | Regular Research Grants |