槽道式气体流量计及其不确定度分析  

Channel Gas Flowmeter and its Precision Analysis

作　　者：白亚磊[1] 明晓[1] 

机构地区：[1]南京航空航天大学空气动力学系,江苏南京210016

出　　处：《计量学报》2008年第5期441-444,共4页Acta Metrologica Sinica

基　　金：国家自然科学基金(10672079)

摘　　要：介绍了一种新型的节流式差压流量计——槽道式流量计,论述了其具有输出信号大、永久性压力损失小、流动极为稳定、抗干扰能力强等优点。对其不确定度进行分析的结果表明,其合成不确定度可达0.202%,优于目前普遍使用的临界流音速标准装置的合成不确定度0.32%。文章最后初步分析了槽道式流量计成为气体流量标准装置的可行性。A new type of differential pressure flowmeter - the channel flowmeter is developed. Its predominant characteristics are, high signal/noise ratio, low permanent pressure loss, very stable flow inside, the capability to minimize the coming disturbances and so on. The precision of the channel flowmeter＇ s is analysed. The results indicate that its precision can get to 0. 202 % which is better than that of normal critical flow calibration facilities with precision of 0.32 %. Finally, the reasons why the channel flowmeter could become a gas flow calibrator are given.

关 键 词：计量学 槽道式流量计 不确定度分析 差压 压力损失 气体流量标准装置 

分 类 号：TB937[一般工业技术—计量学]