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Superconducting instrumentation for high Reynolds turbulence experiments with low temperature gaseous helium by S. Pietropinto; C. Poulain; C. Baudet; B. Castaing; B. Chabaud; Y. Gagne; B. Hébral; Y. Ladam; P. Lebrun; O. Pirotte; P. Roche is a Physics and Astronomy article available to read on EtoBox.

What is Superconducting instrumentation for high Reynolds turbulence experiments with low temperature gaseous helium about?

Turbulence is of common experience and of high interest for industrial applications, despite its physical grounds is still not understood. Cryogenic gaseous helium gives access to extremely high Reynolds numbers (Re). We describe an instrumentation hosted in CERN, which provides a 6 kW @ 4.5 K helium refrigerator directly connected to the experiment. The flow is a round jet; the flow rates range from 20 g/s up to 260 g/s at 4.8 K and about 1.2 bar, giving access to the highest controlled Re flow ever developed. The experimental challenge lies in the range of scales which have to be investigated: from the smallest viscous scale g, typically 1 lm at Re 1⁄4 10 7 to the largest L $ 10 cm. The corresponding frequencies: f 1⁄4 v=g can be as large as 1 MHz. The development of an original micrometric superconducting anemometer using a hot spot and its characteristics will be discussed together with its operation and the perspectives associated with superconducting anemometry.

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Author

S. Pietropinto; C. Poulain; C. Baudet; B. Castaing; B. Chabaud; Y. Gagne; B. Hébral; Y. Ladam; P. Lebrun; O. Pirotte; P. Roche

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0921-4534)

Published

2003

Language

EN

Field

Physics and Astronomy (Physical Sciences)