TY - JOUR
T1 - Effects of fuel injection parameters on the performance of homogeneous charge compression ignition at low-load conditions
AU - Keum, SeungHwan
AU - Pal, Pinaki
AU - Im, Hong G.
AU - Babajimopoulos, Aristotelis
AU - Assanis, Dennis N.
N1 - KAUST Repository Item: Exported on 2021-12-14
PY - 2016
Y1 - 2016
N2 - With the objective of enhancing the effectiveness of late fuel injection strategy in extending the low-load limit of homogeneous charge compression ignition engines, a numerical study is conducted to investigate the effects of fuel injection parameters, such as the injection pressure and spray cone angle, on the overall combustion efficiency and CO/NOx emissions. Closed-cycle engine simulations are performed incorporating detailed iso-octane reaction kinetics and combustion submodel based on the spray-interactive flamelet approach. Extensive parametric studies are conducted to provide a detailed map of the combustion efficiency and emission performance. In general, it is found that the in-cylinder charge stratification can be reduced by both an increased injection pressure and a wider spray cone angle, resulting in substantially lower NOx emissions and reasonably high combustion efficiency simultaneously. The present study demonstrates that an optimal adjustment of the two fuel injection parameters can result in significant extension of the low-load limit of homogeneous charge compression ignition through delayed fuel injection strategy.
AB - With the objective of enhancing the effectiveness of late fuel injection strategy in extending the low-load limit of homogeneous charge compression ignition engines, a numerical study is conducted to investigate the effects of fuel injection parameters, such as the injection pressure and spray cone angle, on the overall combustion efficiency and CO/NOx emissions. Closed-cycle engine simulations are performed incorporating detailed iso-octane reaction kinetics and combustion submodel based on the spray-interactive flamelet approach. Extensive parametric studies are conducted to provide a detailed map of the combustion efficiency and emission performance. In general, it is found that the in-cylinder charge stratification can be reduced by both an increased injection pressure and a wider spray cone angle, resulting in substantially lower NOx emissions and reasonably high combustion efficiency simultaneously. The present study demonstrates that an optimal adjustment of the two fuel injection parameters can result in significant extension of the low-load limit of homogeneous charge compression ignition through delayed fuel injection strategy.
UR - http://hdl.handle.net/10754/669962
UR - http://journals.sagepub.com/doi/10.1177/1468087415583597
UR - http://www.scopus.com/inward/record.url?scp=84961392584&partnerID=8YFLogxK
U2 - 10.1177/1468087415583597
DO - 10.1177/1468087415583597
M3 - Article
AN - SCOPUS:84961392584
SN - 2041-3149
VL - 17
SP - 413
EP - 420
JO - International Journal of Engine Research
JF - International Journal of Engine Research
IS - 4
ER -