乙醇与汽油基础燃料混合物的临界性质  

Critical properties of mixtures of ethanol and primary reference fuels

作　　者：王奕然 徐济民 蓝天 刘向阳[1] 何茂刚[1] WANG Yiran;XU Jimin;LAN Tian;LIU Xiangyang;HE Maogang(Key Laboratory of Thermal Fluid Science and Engineering of MOE,Xi'an Jiaotong University,Xi'an 710049,China)

机构地区：[1]西安交通大学热流科学与工程教育部重点实验室,陕西西安710049

出　　处：《热科学与技术》2024年第1期9-14,共6页Journal of Thermal Science and Technology

基　　金：国家自然科学基金资助项目(51936009)。

摘　　要：乙醇汽油是重要的新型清洁燃料之一,临界性质是研究其超/跨临界喷射燃烧的基础数据。基于低停留时间流动法,首次测量了乙醇与汽油基础燃料(异辛烷和正庚烷)三元混合体系的临界性质。结果表明:乙醇/异辛烷/正庚烷三元混合物的临界温度(T_(c))随乙醇比例的增加呈先减小后增大的变化趋势,临界压力(p_(c))随乙醇比例的增加而增大。基于Redlich-Kister方程建立了乙醇/异辛烷/正庚烷三元混合物临界性质的计算模型,T_(c)和p_(c)的平均绝对相对偏差最大值分别为0.08%和0.40%。Ethanol gasoline is one of the important new clean fuels,and its critical properties are the basic data for studying its supercritical or transcritical injection combustion.The critical properties of the ternary mixtures of ethanol and primary reference fuels(iso-octane and n-heptane)were measured by a low residence time flow method for the first time.The results show that the critical temperature(T_(c))first decreases and then increases with the increase of mole fraction of ethanol,while critical pressure(p_(c))increases continuously.Based on the Redlich-Kister equation,a model is presented for the critical properties of ternary mixtures of ethanol+iso-octane+n-heptane.The maximum average absolute relative deviations of T_(c)and p_(c)are 0.08%and 0.40%,respectively.

关 键 词：乙醇汽油 临界性质 流动法 基础燃料 

分 类 号：TK121[动力工程及工程热物理—工程热物理]