气体流量计量新标准——音速喷咀  

Sonic Nozzle-A New Standard for Gas Flow Metrical Measurement

作　　者：方宗良 

出　　处：《仪器仪表学报》1980年第1期83-91,共9页Chinese Journal of Scientific Instrument

摘　　要：本文简要介绍一种应用音速喷咀的新型气体流量计量标准的基本原理,着重分析了音速喷咀试验设备和音速喷咀流出系数的误差。通过对八套音速喷咀的标定,其极限误差在±0.2%以内。并应用音速喷咀对涡轮流量计、腰轮流量计和密度补偿式孔板气体质量流量计进行标定。涡轮流量计与腰轮流量计的线性度在±0.54%以内;密度补偿式孔板气体质量流量计的线性度在±1.2%以内。This paper introduces a principle of a new standard for gas folw metrical measurement. It's on the basis of the application of sonic nozzle. The error analysis of the testing apparatus and the discharge coefficient of the sonic nozzle is carried on. Eight sets of nozzle have been calibrated, its limit error is within ±0.2%. The sonic nozzle is used to calibrate turbine flowmeters, Roots flowmeters, and density compensated orifice gas mass flowmeters. The linearity of the former two is better than ±0.54%, and the latter one is within±1.2%.

关 键 词：气体流量计 流出系数 孔板 补偿式 钟罩 流量范围 气体计量 积算 水银温度计 安装条件 

分 类 号：TH814[机械工程—仪器科学与技术]