用于汽车稀释排气流量测量的锥形流量计特性  

V-cone flowmeter characteristics for measuring vehicle diluted exhaust gas flow

作　　者：谢俊[1] 高建立[2] 谢文磊[2] 穆桂脂[2] 刘军[2] 

机构地区：[1]江苏大学机械工程学院,江苏镇江212013 [2]江苏大学汽车与交通工程学院,江苏镇江212013

出　　处：《江苏大学学报（自然科学版）》2009年第4期357-361,共5页Journal of Jiangsu University：Natural Science Edition

基　　金：国家科技支撑计划项目(2007BAK35B02)

摘　　要：为实现稀释排气流量的精确测量,进行了锥形流量计的结构设计.建立锥形流量计流量的理论计算模型,编制了计算软件.应用Fluent计算流体动力学软件对锥形流量计进行流量仿真,并研究了锥体前后锥角大小、有无连接支撑杆以及气体温度等因素对流量计流量计量特性的影响.最后进行与标准临界文丘里喷嘴组的对比验证试验.结果表明,理论计算模型、仿真计算、试验验证的一致性较好,该流量计具有较高精度和稳定性,适合应用于汽车稀释排气流量测量.In order to accurately measure the diluted exhaust flow, the structure of V-cone flowmeter was designed. A model of flow measurement was established and the calculation software was developed. The flow of V-cone flowmeter was simulated by using Fluent software. The influence of the flowmeter＇s differential pressure of the pre and post cone at different cone angle, with or without connective bar, and the gas temperature and so on were studied. Finally, the results of the verification test with critical flow venturi（CFV） indicate that the calculation model, simulation and the experiment results have strong consistency, and the flowmeter is of great accuracy and stability.

关 键 词：锥形流量计 碳平衡法 流量测量 数值仿真 

分 类 号：TH814[机械工程—仪器科学与技术]