In situ calibration of hot wire probes in turbulent flows
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A method for in situ calibration of hot-wires in a turbulent flow is presented. The method is particularly convenient (even necessary) for calibrating large probe arrays, like the 143-wire boundary layer rake of the WALLTURB experiment. It is based on polynomial expansion of the velocity statistics in terms of voltage statistics as originally described by George et al. [Exp Ther Fluid Sci 2(2):230–235, 1989]. Application of the method requires knowing reference mean velocity and higher order central moments (with the array in place) of the turbulent velocity at the probe location at only one freestream velocity. These were obtained in our experiment by a stereo PIV plane just upstream of the probe array. Both the procedure for implementing the method and sample results are presented in the article.
KeywordsParticle Image Velocimetry Central Moment Calibration Coefficient Particle Image Velocimetry Data Freestream Velocity
The authors would like to thank P. B. V. Johansson and L. Jernqvist of Chalmers, F. Mehdi of University of New Hampshire, and P. Braud and C. Fourment of Laboratoire d’Etudes Aérodynamiques for their help for realization of the experiments within the Wallturb research program. This work has been performed under the WALLTURB project. WALLTURB (A European synergy for the assessment of wall turbulence) is funded by the CEC under the sixth framework program (CONTRACT No: AST4-CT-2005-516008).
- Bruun HH (1995) Hot-wire anemometry. Oxford University Press, New YorkGoogle Scholar
- Coudert S, Foucaut JM, Kostas J, Stanislas M, Braud P, Fourment C, Delville J, Tutkun M, Mehdi F, Johansson PBV, George WK (2007) Double large field stereoscopic PIV in a high Reynolds number turbulent boundary layer. Exp FluidsGoogle Scholar
- Delville J, Fourment C, Tutkun M, Johansson PBV, George WK, Kostas J, Coudert S, Foucaut JM, Stanislas M (2007) High Reynolds number flat plate turbulent boundary layer experiments using a hot-wire rake synchronized with stereo PIV. In: Fifth international symposium on turbulence and shear flow phenomena, vol 1, pp 23–28Google Scholar
- George WK, Beuther PD, Lumley JL (1978) Processing of random signals. In: Proceedings of the dynamic flow conference, pp 757–800Google Scholar
- Glauser MN (1987) Coherent structures in the axisymmetric turbulent jet mixing layer. Ph.D. dissertation, State University of New York, BuffaloGoogle Scholar
- Perry AE (1982) Hot-wire anemometry. Oxford University Press, New YorkGoogle Scholar
- Tutkun M (2008) Structure of zero pressure gradient high Reynolds number turbulent boundary layers. Ph.D. dissertation, Chalmers University of Technology, Göteborg, Sweden. ISBN: 978-91-7385-166-4Google Scholar