甲基四氢呋喃-异辛烷层流燃烧特性  

Laminar Flame Characteristics of 2-Methyltetrahydrofuran Blended with Isooctane

作　　者：何本壮 秦明元 陈日新 李德华 樊祥山[1] 王锡斌[1] He Benzhuang;Qin Mingyuan;Chen Rixin;Li Dehua;Fan Xiangshan;Wang Xibin(School of Energy and Power Engineering,Xi’an Jiaotong University,Xi’an 710049,China)

机构地区：[1]西安交通大学能源与动力工程学院,陕西西安710049

出　　处：《内燃机学报》2021年第3期217-224,共8页Transactions of Csice

基　　金：国家自然科学基金资助项目(51176136).

摘　　要：利用纹影和高速摄像系统,在定容燃烧弹中研究了异辛烷掺混不同摩尔分数(0、20%、40%、60%及100%)的2-甲基四氢呋喃(2-MTHF)在不同初始温度(373、423和453 K)、不同初始压力(0.1、0.2和0.4 MPa)和不同当量比(0.7~1.6)下的层流燃烧特性.几种掺混比下的层流燃烧速度都是在当量比为1.1左右达到峰值,MTHF在异辛烷中的掺混会明显提高其层流燃烧速度.随着初始温度的升高,不同当量比下的层流燃烧速度大幅上升;而随着初始压力的升高,层流燃烧速度呈下降趋势.异辛烷层流燃烧速度对于初始温度的变化比MTHF更为敏感,MTHF层流燃烧速度对于初始压力的变化比异辛烷更为敏感.通过理论分析建立了层流燃烧速度与温度、压力、掺混比和当量比的拟合公式,拟合公式与试验结果吻合良好.The laminar flame characteristics of 2-methyltetrahydrofuran(MTHF)/isooctane blends with different blending ratio(0,20%,40%,60%,100%)were studied under different initial pressure(0.1,0.2,0.4MPa),different initial temperature(373,423,453 K)and equivalence ratios(0.7—1.6)using high speed schlieren photography system in a constant combustion chamber.The results indicate that the laminar flame speed reaches the peak value at the equivalence ratio of 1.1 under different blending ratios.The laminar flame speed increases with the increase of blending ratios.The laminar flame speed of isooctane is more sensitive to the change of initial temperature than that of MTHF,while the laminar flame speed of MTHF is more sensitive to the change of initial pressure than that of isooctane.Through the data analysis,the fitting correlation of laminar flame speed versus temperature,pressure,blending ratio and equivalence ratio was established,which is in good agreement with the experimental data.

关 键 词：2-甲基四氢呋喃/异辛烷混合燃料 定容燃烧弹 层流燃烧速度 

分 类 号：TK407.9[动力工程及工程热物理—动力机械及工程]