Decreasing the emissions of a partially premixed gasoline fueled compression ignition engine by means of injection characteristics and exhaust gas recirculation
Thermal Science, cilt.15, sa.4, ss.939-952, 2011 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 15 Sayı: 4
- Basım Tarihi: 2011
- Doi Numarası: 10.2298/tsci110227099n
- Dergi Adı: Thermal Science
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Sayfa Sayıları: ss.939-952
- Anahtar Kelimeler: Combustion, Compression ignition engine, Emission reduction, Exhaust gas recirculation, Gasoline fuel, Injection characteristics
- Hacettepe Üniversitesi Adresli: Evet
Özet
This paper is presented in order to elucidate some numerical investigations re-lated to a partially premixed gasoline fuelled engine by means of three dimen-sional computational fluid dynamics code. Comparing with the diesel fuel, gaso-line has lower soot emission because of its higher ignition delay. The application of double injection strategy reduces the maximum heat release rate and leads to the reduction of NO x emission. For validation of the model, the results for the mean in-cylinder pressure, heat release rate, NO x and soot emissions are com-pared with the corresponding experimental data and show good levels of agree-ment. The effects of injection characteristics such as, injection duration, spray angle, nozzle hole diameter, injected fuel temperature and exhaust gas recircula-tion rate on combustion process and emission formation are investigated yielding the determination of the optimal point thereafter. The results indicated that opti-mization of injection characteristics leads to simultaneous reduction of NO x and soot emissions with negligible change in indicated mean effective pressure.