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Title: Improvement Of Thermodynamic Calculations Used For The Flow Rate Of Sonic Nozzles
Author: J.P. Vallet, C. Windenberger
Source: Flomeko 2000
Year Published: 2000
Abstract: Nozzles operating under sonic conditions are already used widely as reference flowmeters in many countries to measure gas flow rate under pressure. These Nozzles are calibrated, in each of the countries concerned, on approved primary test rigs. The techniques used in these countries today are the fruit of R&D carried out on nozzles for more than twenty years. The outcome has been standard ISO 9300, published in 1990, on the technique for measuring gas flowrates using a sonic nozzle.

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