Force measurements on a circular cylinder in a Cryogenic Ludwieg-Tube using piezoelectric transducers

Force measurements on a circular cylinder in a Cryogenic Ludwieg-Tube using piezoelectric... Force and pressure measurements were performed in a high Reynolds number facility, i.e. the Cryogenic Ludwieg-Tube (KRG). The balance based on multicomponent piezoelectric force transducers was applied totally in the cryogenic environment. The behaviour of the balance was tested ranging from ambient down to cryogenic conditions. As test cases, the flow around a circular cylinder was investigated at a sub- and supercritical Mach number. The highest possible Reynolds number in most nearly incompressible flow (Re = 5.8 × 106) was achieved at the temperature of T = −150°C, the highest pressure possible, p 0 = 10 bar, and the lowest attainable Mach number of Ma = 0.28. The results show that, in spite of the pulse operating mode of the tunnel, the steady and unsteady processes can be measured very well by means of a piezoelectric balance. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Experiments in Fluids Springer Journals

Force measurements on a circular cylinder in a Cryogenic Ludwieg-Tube using piezoelectric transducers

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Publisher
Springer-Verlag
Copyright
Copyright © 2007 by Springer-Verlag
Subject
Engineering; Engineering Fluid Dynamics; Fluid- and Aerodynamics; Engineering Thermodynamics, Heat and Mass Transfer
ISSN
0723-4864
eISSN
1432-1114
D.O.I.
10.1007/s00348-007-0250-1
Publisher site
See Article on Publisher Site

Abstract

Force and pressure measurements were performed in a high Reynolds number facility, i.e. the Cryogenic Ludwieg-Tube (KRG). The balance based on multicomponent piezoelectric force transducers was applied totally in the cryogenic environment. The behaviour of the balance was tested ranging from ambient down to cryogenic conditions. As test cases, the flow around a circular cylinder was investigated at a sub- and supercritical Mach number. The highest possible Reynolds number in most nearly incompressible flow (Re = 5.8 × 106) was achieved at the temperature of T = −150°C, the highest pressure possible, p 0 = 10 bar, and the lowest attainable Mach number of Ma = 0.28. The results show that, in spite of the pulse operating mode of the tunnel, the steady and unsteady processes can be measured very well by means of a piezoelectric balance.

Journal

Experiments in FluidsSpringer Journals

Published: Feb 9, 2007

References

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