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本文介绍了一种新型的车载气体涡轮流量计检定系统。该系统由计算机控制一台数控喷嘴切换阀,可以根据流量计的口径自动选择11个音速喷嘴中的任一人对气体涡轮流量计在工况条件下进行检定;同时该系统中还有一台气相色谱仪与音速喷嘴结合起来完成气体质量流量的运算。文章中还介绍了用音速喷嘴检定气体涡流量计的质量流量公式和容积流量公式.以及检定系统的工艺流程图。采用该系统检定气体涡轮流量计,可以由计算机直接进行温度、压力修正、提高检定精度。
This article describes a new vehicle gas turbine flow meter verification system. The system is controlled by a computer CNC nozzle switching valve, according to the caliber of the meter automatically select any one of 11 sonic nozzles on the gas turbine flowmeter in the condition of the test conditions; the system also has a gas chromatography Instrument and sonic nozzle to complete the gas mass flow calculation. The article also describes the use of sonic nozzle gas vortex flowmeter mass flow formula and volume flow formula. As well as the verification system of process flow chart. The gas turbine flowmeter used in this system can be directly measured by the computer temperature and pressure correction to improve the test accuracy.