HOT WIRE    ANEMOMETRY

· Single and X hot wire probes.

- diameter 5 µm and 2,5 mm.

- length 1,2 mm and 0,5 mm.

· Direct numerical acquisition (100 KHz)

· Velocity and temperature computer contolled

· Conditional analysis.

- intermittency factor.

- conditional moments.

-  Moments up to the 4 ^th order,

- Correlations up to the 3 ^rd order,

- Turbulent kinetic energy balance.

· Spectral analysis.

- one dimensional spectra for the three velocity components,

- computation of   e by integration of the dissipation spectrum.

Thanks to the size of the facility the near wall region can be well captured

The behaviour is nearly Gaussian in 60% of the boundary layer. Outside, the intermittency induces a deviation. Very near the wall, the probe size is a source of error.

Both the universal region (slope -5/3) and the production region (slope -1) are put to evidence