CFD Simulation of a Common Rail Diesel Engine with Biobutanol-Diesel Blends for Various Injection Timings
| Autor: | Venkatesh T. Lamani, G.N. Kumar, Ajay Kumar Yadav |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Thermal efficiency
Common rail Materials science 060102 archaeology 020209 energy Combustion analysis 06 humanities and the arts 02 engineering and technology Combustion Diesel engine Fuel injection Automotive engineering Diesel fuel 0202 electrical engineering electronic engineering information engineering 0601 history and archaeology Combustion chamber |
| Zdroj: | Springer Proceedings in Energy ISBN: 9783319472553 |
| Popis: | Turmoil in petroleum market and stringent environment guidelines, accelerated the research in the field of alternative fuels for Internal Combustion engines. Biofuel is gaining venerable importance as it is renewable and substitute to the fossil fuels. This study investigates the potential of butanol fueling in a diesel engine. In this computational fluid dynamics (CFD) simulation, the effect of injection timing and butanol-blends on the exhaust emission and combustion characteristics of common rail direct injection (CRDI) engine is studied. The simulation is carried out for wide range of injection timings from 0° to 30° BTDC, and butanol-diesel blends from, 10, 20, and 30% at very high injection pressure (~90 MPa). Three dimensional computational code is implemented to solve conservation equations based on finite volume method. SIMPLE (semi-implicit method for pressure-linked equations) algorithm is used to obtain velocity and pressure at each computational cell. The flow within the combustion chamber is simulated using the k-ξ-f turbulence model. Extended coherent flame model-3 zone (ECFM3Z) is employed to carry out combustion analysis. In-cylinder fuel injection is studied using blob injection which assumes orifice diameter as fuel droplet diameter. As the percentage of the butanol blend increases, NO, CO increases and soot formation decrease as compare to neat diesel. Optimum injection timing obtained for maximum indicated thermal efficiency for 10–30% blend is 27° BTDC, whereas, for neat diesel it is 24° BTDC. Obtained results are validated with available literature data and found good agreement. |
| Databáze: | OpenAIRE |
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