Abstract
Within the framework of the ITER project, CEA/SBT is in charge of the design, manufacturing and delivery of 277 Venturi flowmeters. The latter were developed for either the control of the supercritical helium flow in the magnets at cryogenic temperature (4.5 K) or the operation of the current leads at room temperature. Depending on the temperature, the values of the Reynolds number in the Venturi tubes are significantly higher or lower than those specified in the standard NF EN ISO 5167-4 regarding the design of Venturi flowmeters. An experimental determination of the flowmeter coefficient was therefore required. Due to the large number of flowmeters, a manufacturing strategy was developed in order to obtain a reproducible behaviour. This strategy was validated by the experimental results obtained at room and cryogenic temperature.
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