Parameterizable constant temperature anemometer: a new method for the analysis of velocity–temperature coupling in turbulent heat transfer

A novel anemometer was designed and implemented for simultaneous measurement of velocity and temperature in air flows with a single hot wire probe. The principle of periodically varying the overheat ratio of the wire was selected and applied through a parameterizable electronic chain. The specific methods developed for the calibration procedure and the signal processing are explained. The accuracy of the measurements was assessed by means of Monte Carlo simulations. Examples of the results are given for a non-isothermal low speed mixing layer. Finally, the ability to extract velocitytemperature coupling from a turbulent non-isothermal flow is highlighted through a conditional probability density function (PDF) analysis.

[1]  R. Moser,et al.  The three-dimensional evolution of a plane mixing layer: pairing and transition to turbulence , 1993, Journal of Fluid Mechanics.

[2]  A. E. Perry,et al.  Hot-Wire Anemometry , 1982 .

[3]  Petar Vukoslavcevic,et al.  The simultaneous measurement of velocity and temperature in heated turbulent air flow using thermal anemometry , 2002 .

[4]  C. Bowman,et al.  The structure of a chemically reacting plane mixing layer , 1986, Journal of Fluid Mechanics.

[5]  D. Heitz,et al.  Parameterizable Constant Temperature Anemometer for simultaneous velocity and temperature measurements in turbulent flow , 2007 .

[6]  Elhadji Malick Ndoye,et al.  Anémométrie fil chaud à température variable : application à l'étude d'une couche de mélange anisotherme , 2008 .

[7]  W. Press,et al.  The Art of Scientific Computing Second Edition , 1998 .

[8]  K. N. Helland,et al.  An experimental analysis of fluctuating temperature measurements using hot-wires at different overheats , 1989 .

[9]  R. Mehta.  Effect of velocity ratio on plane mixing layer development: Influence of the splitter plate wake , 1989 .

[10]  Klaus Bremhorst,et al.  A fully compensated hot/cold wire anemometer system for unsteady flow velocity and temperature measurements , 1990 .

[11]  M. F. Blair,et al.  Hot-Wire Measurements of Velocity and Temperature Fluctuations in a Heated Turbulent Boundary Layer , 1984 .

[12]  H. H. Bruun,et al.  Hot-Wire Anemometry: Principles and Signal Analysis , 1996 .

[13]  I. Wygnanski,et al.  The forced mixing layer between parallel streams , 1982, Journal of Fluid Mechanics.

[14]  William H. Press,et al.  Numerical Recipes in FORTRAN - The Art of Scientific Computing, 2nd Edition , 1987 .

[15]  F. Browand,et al.  Growth of the two‐dimensional mixing layer from a turbulent and nonturbulent boundary layer , 1979 .

[16]  William H. Press,et al.  Numerical recipes in FORTRAN (2nd ed.): the art of scientific computing , 1992 .

[17]  H. Fiedler,et al.  Transport of Heat Across a Plane Turbulent Mixing Layer , 1975 .