乙基叔丁基醚层流火焰特性研究  

Study on the Laminar Flame Characteristics of Ethyl Tert-butyl Ether

作　　者：库金峰 胡二江[1] 黄佐华[1] KU Jin-Feng;HU Er-Jiang;HUANG Zuo-Hua(State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China)

机构地区：[1]西安交通大学动力工程多相流国家重点实验室

出　　处：《工程热物理学报》2019年第7期1694-1702,共9页Journal of Engineering Thermophysics

基　　金：国家自然科学基金(No.91641124)

摘　　要：在定容燃烧弹上对不同工况下乙基叔丁基醚(ETBE)的层流火焰特性进行了实验研究,获得了层流火焰速度和马克斯坦长度。基于实验数据,对现有ETBE的化学反应动力学模型进行了验证。结果表明,甲基叔丁基醚(MTBE)、ETBE、乙醇、异辛烷、95~#汽油五种燃料中,乙醇层流火焰速度最快,其他四种燃料的层流火焰速度差别不大;现有模型均不能很好的预测ETBE的层流火焰速度;临界火焰半径的实验及计算结果一致表明ETBE火焰不稳定性随压力和当量比的增加而增加.研究工作对ETBE作为汽油添加剂的使用提供理论指导。Laminar flame characteristics of premixed ethyl tert-butyl ether(ETBE)/air flames were measured at a constant volume bomb at different conditions.The Creck model and Curran model of ETBE were also validated according to the experimental results.Experimental results show that ethanol has the fastest laminar flame speed among the five kinds of fuels of methyl tert-butyl ether(MTBE),ethyl tert-butyl ether,ethanol,isooctane and 95# gasoline and the differences of laminar flame speeds of the other four fuels are relatively small.The existing models perform not well in predicting laminar flame speeds of ETBE.The experimental and numerical results of the critical flame radius reveal that the flame instability of ETBE increases with the increase of pressure and equivalence ratio.The research work will provide theoretical guidance for the use of ETBE as a gasoline additive.

关 键 词：乙基叔丁基醚 层流火焰速度 模型验证 马克斯坦长度 火焰不稳定性 

分 类 号：TK411[动力工程及工程热物理—动力机械及工程]