Dynamic behavior of hot-wire probes in turbulent boundary layers
JM Österlund, AV Johansson - Advances in Turbulence V: Proceedings of …, 1995 - Springer
Advances in Turbulence V: Proceedings of the Fifth European Turbulence …, 1995•Springer
Hot-wire measurements in air of u ω^+ in the near wall region of a turbulent boundary layer
at high Reynolds numbers indicate a thermal interaction for typical two-wire probes, such as
X-and V-probes. In order to determine this interaction two infinitely long parallel wires have
been studied numerically by solving the heat transfer equation. Computations give that for X-
and V-probes a typical Péclet number based on wire separation should be larger than about
50 to keep thermal interaction at an acceptable level. On the other hand for the Parallel …
at high Reynolds numbers indicate a thermal interaction for typical two-wire probes, such as
X-and V-probes. In order to determine this interaction two infinitely long parallel wires have
been studied numerically by solving the heat transfer equation. Computations give that for X-
and V-probes a typical Péclet number based on wire separation should be larger than about
50 to keep thermal interaction at an acceptable level. On the other hand for the Parallel …
Abstract
Hot-wire measurements in air of in the near wall region of a turbulent boundary layer at high Reynolds numbers indicate a thermal interaction for typical two-wire probes, such as X- and V-probes. In order to determine this interaction two infinitely long parallel wires have been studied numerically by solving the heat transfer equation. Computations give that for X-and V-probes a typical Péclet number based on wire separation should be larger than about 50 to keep thermal interaction at an acceptable level. On the other hand for the Parallel-probe the results indicate that the Péclet number should suitably be less than 10 to ensure good sensitivity and uniform response in the frequency range of interest.
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