TY - JOUR
T1 - Numerical simulation and experimental investigation on pollutant emissions characteristics of PODE/methanol dual-fuel combustion
AU - Liu, Junheng
AU - Liu, Zengguang
AU - Wang, Lejian
AU - Wang, Pan
AU - Sun, Ping
AU - Ma, Hongjie
AU - Wu, Pengcheng
N1 - Funding Information:
This work was supported by the National Natural Science Foundation of China (No. 51806086 ), project funded by China Postdoctoral Science Foundation (No. 2020M672133 ), and Postdoctoral Innovation Project of Shandong Province (No. 202002035 ).
Publisher Copyright:
© 2022 Elsevier B.V.
PY - 2022/6/15
Y1 - 2022/6/15
N2 - The current study focuses on the effects of methanol ratio, injection timing and intake temperature on emission performance of a common-rail engine with polyoxymethylene dimethyl ethers (PODE)/methanol dual-fuel combustion mode. Then, the numerical model of dual-fuel combustion is established using CFD software CONVERGE coupled with PODE/methanol chemical kinetic mechanism, and the distribution and evolution characteristics of important radicals, methanol and temperature fields inside cylinder are calculated and analyzed. The results show that the NOx and soot emissions of dual-fuel mode decrease by 12.4% and 26.0% compared with pure PODE at 50% load, but CO and HC emissions increase. With the methanol ratio increasing, the NO and N2O emissions decrease, while the methanol, NO2, HCHO, C2H4, CH4 and C2H6 emissions increase, and the peak HO2 mass of dual-fuel increases by 156.2% compared with pure PODE. With the advance of injection timing and the increase of intake temperature, the generation rate of H and OH radicals in dual-fuel combustion raise, the emissions of NO and NO2 increase, while the emissions of methanol, HCHO, C2H4, CH4 and C2H6 decrease. Therefore, compared with traditional diesel engine, more attention should be paid to the unregulated emissions of NO2, methanol and HCHO for PODE/methanol dual-fuel engine.
AB - The current study focuses on the effects of methanol ratio, injection timing and intake temperature on emission performance of a common-rail engine with polyoxymethylene dimethyl ethers (PODE)/methanol dual-fuel combustion mode. Then, the numerical model of dual-fuel combustion is established using CFD software CONVERGE coupled with PODE/methanol chemical kinetic mechanism, and the distribution and evolution characteristics of important radicals, methanol and temperature fields inside cylinder are calculated and analyzed. The results show that the NOx and soot emissions of dual-fuel mode decrease by 12.4% and 26.0% compared with pure PODE at 50% load, but CO and HC emissions increase. With the methanol ratio increasing, the NO and N2O emissions decrease, while the methanol, NO2, HCHO, C2H4, CH4 and C2H6 emissions increase, and the peak HO2 mass of dual-fuel increases by 156.2% compared with pure PODE. With the advance of injection timing and the increase of intake temperature, the generation rate of H and OH radicals in dual-fuel combustion raise, the emissions of NO and NO2 increase, while the emissions of methanol, HCHO, C2H4, CH4 and C2H6 decrease. Therefore, compared with traditional diesel engine, more attention should be paid to the unregulated emissions of NO2, methanol and HCHO for PODE/methanol dual-fuel engine.
KW - combustion process
KW - dual-fuel engine
KW - methanol
KW - numerical calculation
KW - pollutant formation
KW - polyoxymethylene dimethyl ethers
UR - http://www.scopus.com/inward/record.url?scp=85126745422&partnerID=8YFLogxK
U2 - 10.1016/j.fuproc.2022.107228
DO - 10.1016/j.fuproc.2022.107228
M3 - Article
AN - SCOPUS:85126745422
SN - 0378-3820
VL - 231
JO - Fuel Processing Technology
JF - Fuel Processing Technology
M1 - 107228
ER -