Abstract
In the WALLTURB LML experiment presented in Delville et al. (Stanislas, M., Jimenez, J., Marusic, I. (eds.) Progress in Wall Turbulence: Understanding and Modeling. Proceedings of the WALLTURB International Workshop Held in Lille, France, April 21–23, 2009. ERCOFTAC Series, vol. 14. Springer, Dordrecht, 2011), the calibration of the hot wire rake had to be performed on site, due to the large number of wires on the rake (143). For that purpose, the position of the wires with respect to the wall was carefully measured using two complementary techniques. The blockage effect due to the rake was characterized using StereoPIV and modeled using a simple potential flow model. The results show that the blockage affects mostly the mean flow and not the turbulence itself. Finally, the calibration data were built using the StereoPIV data in a plane located 1 cm upstream of the wires plane. The mean velocity, the second and third moments were provided. The calibration was checked on the fourth moment of the fluctuating velocity.
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References
Delville, J., Braud, P., Coudert, S., Foucaut, J.-M., Fourment, C., George, W.K., Johansson, P.B.V., Kostas, J., Mehdi, F., Royer, A., Stanislas, M., Tutkun, M.: The WALLTURB joined experiment to assess the large scale structures in a high Reynolds number turbulent boundary layer. In: Stanislas, M., Jimenez, J., Marusic, I. (eds.) Progress in Wall Turbulence: Understanding and Modeling. Proceedings of the WALLTURB International Workshop Held in Lille, France, April 21–23, 2009. ERCOFTAC Series, vol. 14. Springer, Dordrecht (2011)
Tutkun, M., George, W.K., Foucaut, J.M., Coudert, S., Stanislas, M., Delville, J.: In situ calibration of hot wire probes in turbulent flows. Exp. Fluids 46(4), 617–629 (2009)
Acknowledgements
The authors would like to acknowledge P.B.V. Johansson who did a significant contribution to the success of the experiment itself. 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 6th framework program (CONTRACT No: AST4-CT-2005-516008).
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Stanislas, M., Foucaut, JM., Coudert, S., Tutkun, M., George, W.K., Delville, J. (2011). Calibration of the WALLTURB Experiment Hot Wire Rake with Help of PIV. In: Stanislas, M., Jimenez, J., Marusic, I. (eds) Progress in Wall Turbulence: Understanding and Modeling. ERCOFTAC Series, vol 14. Springer, Dordrecht. https://doi.org/10.1007/978-90-481-9603-6_8
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DOI: https://doi.org/10.1007/978-90-481-9603-6_8
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