生物柴油/正戊醇混合燃油喷嘴内流动特性模拟  

Flow Characteristics Simulation of Biodiesel/N-amyl Alcohol Mixed Fuel Nozzles

作　　者：刘彤馨 潘江如 孔得丞[1] LIU Tongxin;PAN Jiangru;KONG Decheng(School of Traffic and Logistics Engineering,Xinjiang Agricultural University,Urumqi Xinjiang 830052,China;School of Control Engineering,Xinjiang Institute of Engineering,Urumqi Xinjiang 830052,China;Provincial and Ministerial Key Laboratory of Chang’an University,Xi’an Shaanxi 710064,China)

机构地区：[1]新疆农业大学交通与物流工程学院,新疆乌鲁木齐830052 [2]新疆工程学院控制工程学院,新疆乌鲁木齐830052 [3]长安大学省部级重点实验室,陕西西安710064

出　　处：《农业工程》2022年第11期98-104,共7页AGRICULTURAL ENGINEERING

基　　金：新疆维吾尔自治区高校科研计划项目(XJEDU20181019);陕西省交通新能源开发、应用与汽车节能重点实验室(长安大学)开放课题资助项目(301822171130)。

摘　　要：为探究混合燃油理化性质差异对柴油机喷嘴内流动特性的影响,以4种不同掺混比的生物柴油/正戊醇为研究对象,采用混合多相流模型,对柴油机喷嘴内的流动情况进行数值模拟分析。结果表明:4种燃油的压力、速度和空化分布特性基本一致;随着正戊醇掺混比例的增加,混合燃油速度和气相体积分数大小在喷孔同一截面处均表现为增加趋势,向生物柴油中掺混一定比例的正戊醇,可以显著降低生物柴油的密度、黏度和表面张力,提高燃油在喷孔内的流动性、促进燃油的空化生成,提升燃油的雾化效果。In order to explore influence of physicochemical properties of mixed fuel on flow characteristics in nozzles of diesel engine,mixed multiphase flow model was used to simulate flow in nozzles of diesel engine with four different mixing ratios of biodiesel/n-amyl alcohol.Results showed that pressure,velocity and cavitation distribution characteristics of four fuels were basically the same.With increase of mixing ratio of n-amyl alcohol,speed of mixed fuel gas phase volume fraction in spray hole size the same cross-section were characterized by increasing trend,biodiesel mixed in certain proportion was n-amyl alcohol and biodiesel could significantly reduce density,viscosity and surface tension,improve fuel in liquidity,promote cavitation generation of fuel,and improve fuel atomization effect.

关 键 词：生物柴油 正戊醇 混合燃料 数值模拟 

分 类 号：TK6[动力工程及工程热物理—生物能]