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An improved method for measuring velocity and concentration by thermo-anemometry in turbulent helium-air mixtures

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Abstract

 A hot wire/film probe is used with new operating conditions for measurements of velocity and concentration in helium/air mixtures. With the upstream wire much more overheated than the downstream film, the sensing elements behave almost independently and the calibration map is composed of clearly distinct iso-velocity and iso-concentration curves. This behaviour is largely explained by the difference in the heated elements’ diameters. Tests of the probe in a turbulent boundary layer with large density variations indicate very satisfactory measurements. The domain of use for the probe is considerably extended with these new operating conditions.

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Authors and Affiliations

  1. Laboratoire d’Energétique Industrielle, Ecole Nationale Supérieure des Mines de Douai, 941 rue Charles Bourseul, B.P. 838, F-59508 Douai Cedex, France, , , , , , FR

    J.-L. Harion

  2. Laboratoire des Ecoulements Géophysiques et Industriels, Institut de Mécanique de Grenoble, B.P. 53X, F-38041 Grenoble Cedex, France, INPG, UJF, CNRS, , , , , , FR

    M. Favre-Marinet

  3. Instituto de Pesquisas Hidraulicas, Universidade Federal de Rio Grande do Sul Porto Alegre, Brasil, , , , , , XX

    B. Camano

Authors
  1. J.-L. Harion
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  2. M. Favre-Marinet
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  3. B. Camano
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Received: 8 January 1996/Accepted: 29 May 1996

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Harion, JL., Favre-Marinet, M. & Camano, B. An improved method for measuring velocity and concentration by thermo-anemometry in turbulent helium-air mixtures. Experiments in Fluids 22, 174–182 (1996). https://doi.org/10.1007/s003480050035

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  • DOI: https://doi.org/10.1007/s003480050035

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