TY - JOUR
TI - Effect of nozzle hole size coupling with exhaust gas re-circulation on the engine emission perfomance based on KH-ACT spray model
AU - Zhang Liang
AU - He Zhixia
AU - Wang Qian
AU - Guo Genmiao
JN - Thermal Science
PY - 2015
VL - 19
IS - 6
SP - 2003
EP - 2012
PT - Article
AB - To research an effective measure of reducing the Soot and NOx in engine at  the same time, different nozzle hole diameters coupled with exhaust gas  recirculation (EGR) were adopted in this study based on KH-ACT spray breakup  model, which takes the aerodynamic-induced ,cavitation-induced and  turbulence-induced breakup into account. The SAGE detailed chemistry  combustion and the new atomization model used in the simulation have been  verified with the experiment data from a YN4100QBZL engine. Different diesel  nozzles was adopted in the study combined with different EGR rates ranging  from 0% to 40%. The simulation results show that the NOx emission could be  reduced effectively for both small(0.1mm) and large(0.15mm) diesel nozzle  when increasing EGR ratio. The soot emission increases for the small nozzle  hole size as the EGR increasing. However, when it comes to the large diesel  nozzle, the emission increases slightly first and decrease quickly when the  EGR rate above 20%.