音速喷嘴气体流量标准装置测量不确定度评定

各种流量计从研制到使用，必须对其特性进行研究，对其标称的流量性能进行试验，并给出试验结果。这些试验研究工作都需要在流量标准装置上进行。因此，流量标准装置的不确定度直接关系到试验结果的水平，对其研究是非常必要的。用临界流文丘利喷嘴做为流量标准，用比较法原理对流量计进行检定和校准，音速喷嘴法气体流量标准装置可对各种气体流量计的检测和校准，并对其检定和校准结果的不确定度进行评定。

Evaluation of measurement uncertainty for gas flow circular venturi tubes stamdard device

For all kinds of flowmeter, it is necessary to research on their characteristics from development to application. All the tests are performed on flowmeter standard device. Since measurement uncertainty affect test results a lot, the uncertainty evaluation is rather important. Taking Gas Flow Circular Venturi Tubes Standard Device as example, this paper introduced verification and calibration methods as well as measurement uncertainty evaluation of test results.