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Combustion and emission characteristics of converging group-hole nozzle under lean engine operating conditions

Title
Combustion and emission characteristics of converging group-hole nozzle under lean engine operating conditions
Author
박성욱
Keywords
Converging group-hole nozzle; Gasjet superposition model; Combustion and emissions
Issue Date
2011-11
Publisher
Elsevier Science LTD
Citation
FUEL, 2011, 90(11), P.3259-3267
Abstract
This paper describes the combustion and emission characteristics of converging group-hole nozzles and compares the results to those of a single hole nozzle with the same overall nozzle exit hole area. Engine experiments were performed using a single-cylinder diesel engine operating under overall lean conditions (i.e., equivalence ratio 0.45). The considered nozzle configurations in the experiments included a converging group-hole nozzle (cGHN) with 3 degrees converging angle, 0.090 mm hole diameter, and a single hole nozzle (SHN) of 0.128 mm hole diameter. The CFD calculations used the KIVA engine simulation code integrated with a Gasjet superposition model. Using the validated calculation models, the test conditions were also expanded to consider wider converging angle cGHNs (up to 12 degrees). The results show that the evaporation of sprays from the cGHN-3 degrees nozzle is more delayed than that of the SHN case and the cGHNs entrain more ambient gas due to smaller droplet sizes in the outer spray periphery. In addition, an increase in the converging angle of the cGHNs promotes fuel evaporation and produces a more homogeneous fuel-air mixture.
URI
https://www.sciencedirect.com/science/article/pii/S0016236111003395?via%3Dihubhttp://repository.hanyang.ac.kr/handle/20.500.11754/72955
ISSN
0016-2361; 1873-7153
DOI
10.1016/j.fuel.2011.06.021
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MECHANICAL ENGINEERING(기계공학부) > Articles
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