文献类型：期刊文献

中文题名：基于活塞热机耦合仿真的柴油-天然气双燃料发动机替代率研究

英文题名：Research on Replacement Rate of Diesel and Natural Gas Dual Fuel Engine Based on Thermo-mechanical Coupling of Piston

作者：张承维 肖兵 郭华华 张生梅

第一作者：张承维

机构：[1]贵州理工学院电气工程系;[2]华南理工大学自动化科学与工程学院

第一机构：贵州理工学院电气与信息工程学院

年份：2016

卷号：0

期号：3

起止页码：71-78

中文期刊名：车用发动机

外文期刊名：Vehicle Engine

收录：CSTPCD;;北大核心:【北大核心2014】；

基金：贵州省科学技术基金项目(黔科合J字[2014]2080号);国家自然科学基金重点项目(61174135)

语种：中文

中文关键词：双燃料发动机;替代率;活塞;热负荷;热机耦合

外文关键词：dual fuel engine;;replacement rate;;piston;;thermal load;;thermo-mechanical coupling

摘要：建立了柴油-天然气双燃料发动机活塞、活塞销、连杆的有限元模型,分析了活塞在不同替代率下标定功率工况时的温度分布情况,将活塞上某些点处的仿真值与实测值进行了对比,误差满足工程要求。将温度场分布作为热机耦合的初始条件加载到活塞上,计算活塞热机耦合作用下的应力场和变形场。结果表明:活塞最高温度值出现在活塞顶部偏离燃烧室一侧,热机耦合的最大应力出现在销座内侧上部,最大变形值出现在活塞顶部偏离燃烧室的外侧,并随着替代率的增加而升高。
The finite element model of piston ,piston pin and connecting rod for diesel-natural gas dual fuel engine was estab-lished and the piston temperature distribution at rated power under different replacement rates was analyzed .The simulation values of some locations on the piston were compared with test values and the error between them could meet the engineering requirements .Using temperature filed distribution as Initial conditions of thermo-mechanical coupling ,the stress field and de-formation field of piston was calculated .The results show that the temperature at the top of piston in one side of combustion chamber is the highest .The stress of thermo-mechanical coupling in the upper position inside piston pin seat is maximum .The deformation at the top of piston outside of the combustion chamber was the most severe and increases with the increase of re-placement rate .