Effects of dimethyl ether and ethanol additions on soot transition in ethylene counterflow diffusion flames

作     者：GUO LinGe YING YaoYao CHEN Chen ZHAO Xuan LIU Dong 

作者机构：MIIT Key Laboratory of Thermal Control of Electronic EquipmentSchool of Energy and Power EngineeringNanjing University of Science and TechnologyNanjing 210094China Advanced Combustion LaboratorySchool of Energy and Power EngineeringNanjing University of Science and TechnologyNanjing 210094China 

出 版 物：《Science China(Technological Sciences)》 (中国科学（技术科学英文版）)

年 卷 期：2024年第67卷第4期

页      面：1094-1112页

核心收录：

学科分类：08[工学] 0817[工学-化学工程与技术] 081701[工学-化学工程] 

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.52106160 and 52076110) the Natural Science Foundation of Jiangsu Province(Grant No.BK20200490) 

主　　题：optical diagnosis sooting tendency counterflow diffusion flame dimethyl ether ethanol 

摘      要：This paper investigates the effect of blending dimethyl ether(DME)and ethanol on the soot transition periods in ethylene counterflow diffusion flames by using a novel optical diagnostic *** soot critical transition point in different conditions is identified experimentally and *** kinds of flames are carried out to gain the soot critical transition point in counterflow diffusion flames by changing oxygen fraction(Xo)and changing volume flow rates of fuel and oxidizer(Qv).The red-green-blue(RGB)ratio method is used to precisely identify the soot critical transition point,and chemical kinetic simulations are performed to analyze the detailed reaction *** results show that compared to the ethylene flame,the soot critical transition point occurs at a higher Xoand a lower Qvwhen DME or ethanol is *** addition of DME and ethanol can inhibit soot formation,due to the degree of soot formation reaction being lower than the degree of the oxidation reaction in the blending flames.