NUMERICAL AND EXPERIMENTAL INVESTIGATION OF FLOW FIELDS IN CRITICAL FLOW SMALL SIZE NOZZLES

E. von Lavante, J. Allofs, F. Winzösch, R. Kramer, B. Mickan

Abstract

Due to their long term stability, well understood flow behaviour and very low uncertainty, standard critical flow Venturi nozzles (CFVN) are enjoying great popularity as a calibration tool and flow metering device. Their application to very small flow rates beyond the ISO 9300 Standard, however, leaves many questions unanswered. The present work aimed at detailed investigation of flow fields within CFVNs of diameters between 15 µm and 80 µm. The present numerical flow simulations were validated by corresponding experimental work carried out at the PTB.

Keywords

critical flow Venturi nozzles, numerical flow simulation, micro flow rates

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IMEKO-TC9-2013-072.pdf

DOI

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IMEKO TC

TC9 - Flow Measurement

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