某柴油机尾气后处理装置空速计算方法  

Space velocity calculation of exhaust after-treatment device for a diesel engine

作　　者：刘建军 张建华[2] 王明杰 白书战[1] LIU Jianjun;ZHANG Jianhua;WANG Mingjie;BAI Shuzhan(School of Energy and Power Engineering,Shandong University,Jinan 250061,China;Shandong Jiaotong University,Jinan 250357,China)

机构地区：[1]山东大学能源与动力工程学院,山东济南250061 [2]山东交通学院,山东济南250357

出　　处：《内燃机与动力装置》2024年第3期57-61,共5页Internal Combustion Engine & Powerplant

基　　金：山东省科技型中小企业创新能力提升工程项目(2021TSGC1334);济南市市校融合发展战略工程项目(JNSX2023006)。

摘　　要：为提高柴油机后处理装置性能,分析排气质量流量计算方法,开展台架试验采集标准工况下柴油机的进气质量流量;基于进气密度和进气质量流量,分别用进气流量和油耗量测量法、碳平衡法计算尾气后处理装置的空速,并对比2种计算方法的有效性。结果表明:进气质量流量和油耗量测量法、碳平衡法计算的尾气后处理装置空速结果接近,2种方法计算的空速的相对误差为3.94%,均可用于柴油机尾气后处理装置空速计算;相比碳平衡法,基于进气质量流量和油耗量测量法更容易实现。To improve the performance of diesel engine after-treatment device,the calculation method of exhaust mass flow rate is analyzed,and validated by bench tests to collect the intake mass flow rate of diesel engines under the rated conditions.Based on the intake density and intake mass flow rate,the airspeed of the after-treatment of exhaust gas device is calculated using the intake air flow rate and fuel consumption measurement method,as well as the carbon balance method,respectively,and the effectiveness of the two calculation methods is compared.The results show that the air velocity of the after-treatment of exhaust gas device calculated by the intake mass flow rate and fuel consumption measurement method,as well as the carbon balance method,are close.The relative error of air velocity calculated by the two methods is 3.94%,which can be used for calculating the air velocity of diesel engine after-treatment of exhaust gas devices.Compared with the carbon balance method,the measurement method based on intake mass flow rate and fuel consumption is easier to achieve.

关 键 词：柴油机 尾气后处理 空速 排气流量 有效容积 

分 类 号：TK422[动力工程及工程热物理—动力机械及工程]