Silicon Based Sensors for the Measurement of Turbulence and Wall-Pressure Fluctuations in a Two-Dimensional Flat Plate Boundary Layer
Paper i proceeding, 1993

Small and sensitive silicon based sensors for the measurement of turbulence and wall-pressure fluctuations have been designed and fabricated using microelectronic technology. To determine the performance of these sensors, comparisons with conventional hot-wires and microphones were carried out in a well-defined two-dimensional turbulent flat plate boundary layer. The velocity sensors were found to have a spatial and frequency resolution that makes them suitable for turbulence measurements. For the pressure transducers the same good resolution was found, and from the power spectrum, determined directly with a small silicon sensor, a slope in the inertial sub-layer in agreement with the 5/3-law of Kolmogorov was found.


Lennart Löfdahl

Chalmers, Institutionen för termo- och fluiddynamik

Göran Stemme

Bert Johansson

Chalmers, Institutionen för termo- och fluiddynamik

International Conference on Near-wall Turbulent Flows, Tempe, Arizona


Strömningsmekanik och akustik

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