不同氧空比下发动机动力性能与NO_x排放仿真分析（英文）  

Simulation Analysis on Power Performance and NO_x Emission of Engine Under Different Oxygen-Air Ratios

作　　者：李东民[1,2] 张慧[3] 李玉善[4] 

机构地区：[1]山东科技大学机电工程系,山东泰安271019 [2]浙江大学流体动力与机电系统国家重点实验室,浙江杭州310058 [3]宁夏职业技术学院机械与电气技术系,宁夏银川750021 [4]山东科技大学交通学院,山东青岛266590

出　　处：《华侨大学学报（自然科学版）》2016年第3期281-286,共6页Journal of Huaqiao University(Natural Science)

基　　金：山东省自然科学基金资助项目(ZR2015EM042);山东省高等学校科技计划项目(J14LB11);山东科技大学国内访学资助项目(2014-2016年度)

摘　　要：为提高发动机动力性并减少NO_x排放,采用GT-Power对某型发动机进行整机建模,并列出主要组件.根据发动机几何结构参数设置各组件的对应属性和参数,在发动机进气氧空比分别为正常值,以及20%,24%,25%及30%条件下进行了动力性能与NO_x排放仿真实验.实验结果表明:随着氧空比增大,发动机额定功率与扭矩增大;当进气氧空比超过25%时,NO_x排放急剧增大.In order to improve the dynamic performance and reduce NOx emission from the engine, the whole model for a certain type of engine is built with GT-Power, and the main components are displayed in the model. The corresponding properties and parameters for the components are set according to the geometry structure parameters of the engine, and the simulation on dynamic performance and NOx emission under oxygen-air ratios of normal value, 20%, 24%, 25% and 30% for the engine intake is achieved. The simulation results show that the rated power and torque of the engine increase with the increasing of oxygen-air ratio, but the NOx emission increases sharply when oxygen-air ratio is over 25%.

关 键 词：氧空比 NOX排放 仿真 富氧 发动机 

分 类 号：TK401[动力工程及工程热物理—动力机械及工程]