TY - JOUR

T1 - Study of methanol spray flame structure and combustion stability mechanisms by optical phenomenology and chemical kinetics

AU - Zhenyang, Ming

AU - Bo, Liu

AU - Xuan, Zhang

AU - Mingsheng, Wen

AU - Liu, Haifeng

AU - Yanqing, Cui

AU - Ying, Ye

AU - Can, Wang

AU - Jin, Chao

AU - Yusuf, Abdulfatah

AU - Agyekum, Ephraim

N1 - Текст о финансировании The authors would like to acknowledge the financial support to the research provided by the National Natural Science Foundation of China through the Project of 51921004 and 52176125.

PY - 2023

Y1 - 2023

N2 - Methanol is a very promising clean alternative fuel, and the study on pure methanol spray flames has not been found before to authors' knowledge. In this study, the flame structure, soot formation, and combustion stability of spray flame for methanol and conventional fuels were investigated at the ambient pressure of 4 MPa and the ambient temperature of 950 K by the means of optical phenomenology, theoretical analysis and chemical kinetic simulations. Optical images reveal that the methanol spray auto-ignition location and the established steady lifted flame is away from the injector nozzle compared to that of isooctane and n-heptane. The results of the RGB two-color method show that the KL factor in the methanol spray flame is only 0.04–0.05, which is one twentieth of n-heptane and isooctane. The combustion stability of methanol increases with increasing injection mass. Methanol spray flame is the most unstable which is 13.33% and 151.58% less than that of the spray flame of isooctane and n-heptane respectively. In chemical kinetic simulations, the appropriate region for methanol high temperature reactions is outside the relative dense region. The residence time of the rich mixture is short and may not come into contact with the supporting peripheral hot product pool, which leads to poor combustion stability. © 2023.

AB - Methanol is a very promising clean alternative fuel, and the study on pure methanol spray flames has not been found before to authors' knowledge. In this study, the flame structure, soot formation, and combustion stability of spray flame for methanol and conventional fuels were investigated at the ambient pressure of 4 MPa and the ambient temperature of 950 K by the means of optical phenomenology, theoretical analysis and chemical kinetic simulations. Optical images reveal that the methanol spray auto-ignition location and the established steady lifted flame is away from the injector nozzle compared to that of isooctane and n-heptane. The results of the RGB two-color method show that the KL factor in the methanol spray flame is only 0.04–0.05, which is one twentieth of n-heptane and isooctane. The combustion stability of methanol increases with increasing injection mass. Methanol spray flame is the most unstable which is 13.33% and 151.58% less than that of the spray flame of isooctane and n-heptane respectively. In chemical kinetic simulations, the appropriate region for methanol high temperature reactions is outside the relative dense region. The residence time of the rich mixture is short and may not come into contact with the supporting peripheral hot product pool, which leads to poor combustion stability. © 2023.

UR - http://www.scopus.com/inward/record.url?partnerID=8YFLogxK&scp=85170697776

U2 - 10.1016/j.fuproc.2023.107947

DO - 10.1016/j.fuproc.2023.107947

M3 - Article

VL - 252

JO - Fuel Processing Technology

JF - Fuel Processing Technology

SN - 0378-3820

M1 - 107947

ER -