Experiments in Fluids

, 60:110 | Cite as

High frequency temperature fluctuation measurements by Rayleigh scattering and constant-voltage cold-wire techniques

  • Bertrand MercierEmail author
  • Emmanuel Jondeau
  • Thomas Castelain
  • Yuta Ozawa
  • Christophe Bailly
  • Geneviève Comte-Bellot
Research Article


The thermal inertia of sensors drastically limits the measurement of the temperature fluctuations in the high-frequency range. This issue is often addressed using cold wire techniques with dedicated corrections. In this study, three methods are employed to compensate high-frequency attenuation, and the correction of the end losses, are evaluated for four wires with different aspect ratios and diameters. The fidelity of the corrected measurements is assessed by comparing the spectra of temperature fluctuations obtained with the cold wires operating in a constant voltage circuit, to those derived from optical measurements. The latter method is based on Rayleigh scattering and is in principle not affected by thermal inertia as it relies on molecular light scattering. Two flows presenting high levels of temperature fluctuations are considered. Namely, the wake of a heated cylinder, and a mixing layer between two jets in co-flow and at different temperatures. These two configurations allow exploring cold wire performances at high frequency, and show that precise measurements can be performed up to 10 kHz with a wire \(1\,\upmu \hbox {m}\) in diameter.

Graphic abstract



This work was performed within the framework of the Labex CeLyA of Université de Lyon, within the program ”Investissements d’Avenir” (ANR-10-LABX-0060/ ANR-11-IDEX-0007) operated by the French National Research Agency (ANR), and is also partially supported by the industrial Chair ADOPSYS co-financed by SAFRAN-SNECMA and ANR (ANR-13-CHIN-0001-01).


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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Univ Lyon, École Centrale de Lyon, INSA Lyon, Université Claude Bernard Lyon I, CNRS, LMFA, UMR 5509ÉcullyFrance
  2. 2.Univ Lyon, Université Claude Bernard Lyon I, École Centrale de Lyon, INSA Lyon, CNRS, LMFA, UMR 5509VilleurbanneFrance
  3. 3.Experimental Aerodynamics Laboratory, Department of Aerospace EngineeringTohoku UniversitySendaiJapan

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