高温环境下汽油燃料的射流特性  

Characteristics of gasoline jets in a high-temperature environment

作　　者：袁列杰 秦静[1,2] 裴毅强[1] 任源[1] 王志东 刘威 YUAN Liejie;QIN Jing;PEI Yiqiang;REN Yuan;WANG Zhidong;LIU Wei(State Key Laboratory of Engines, Tianjin University, Tianjin 300072, China;Internal Combustion Engine Research Institute, Tianjin University, Tianjin 300072, China)

机构地区：[1]天津大学内燃机燃烧学国家重点实验室,天津300072 [2]天津大学内燃机研究所,天津300072

出　　处：《哈尔滨工程大学学报》2020年第6期853-859,共7页Journal of Harbin Engineering University

基　　金：国家自然科学基金项目(51376202)。

摘　　要：为了研究高温汽油燃料喷入高温环境下的射流特性,试验采用高速摄影和纹影法,并基于汽油缸内直喷发动机常用工况点的缸内温度压力进行了探究。结果表明:汽油处于低亚临界态和超临界态时,随着燃油温度升高,多孔射流的中心轮廓区有明显塌陷和射流前锋面凸起的变化过程,且单孔和多孔汽油射流的贯穿距、宽度、投影面积及轮廓周长变化不一。To study the characteristics of high-temperature gasoline jets in a high-temperature environment,an experiment,focused on the temperature and pressure in the cylinder of a gasoline direct injection(GDI)engine under a common operating condition,was studied via high-speed photography and striation method.Results show that when the fuel is in the low subcritical and supercritical states,the center contour area of the multi-hole jet has an apparent collapse and forward bulge changing process with the increase in fuel temperature,and the penetration distance,width,outline projected area,and perimeter of single-hole and multi-hole jets change differently.

关 键 词：高温环境 超临界流体 射流 燃油温度 缸内直喷 贯穿距 纹影法 汽油 

分 类 号：TK411[动力工程及工程热物理—动力机械及工程]