A Silicon Transducer for the Determination of Wall-Pressure Fluctuations in Turbulent Boundary Layers
Journal article, 1993

Small and sensitive silicon sensors for turbulent wall-pressure fluctuation measurements have been designed and fabricated using microelectronic technology. For the detection of the pressure fluctuations piezoresistive gauges are placed on a diaphragm and the resistance of these gauges depends on the stresses in the diaphragm. For the determination of the performance of these pressure transducers comparisons with conventional microphones were carried out in a well-defined two-dimensional boundary layer. Power spectra from the silicon pressure transducer revealed a slope in the inertial sublayer corresponding approximately to the 1/3-law of Kolmogorov, and the normalized wall-pressure fluctuations agreed well with other direct measurements.


Lennart Löfdahl

Chalmers, Department of Thermo and Fluid Dynamics

Göran Stemme

Department of Applied Electronics

Magnus Glavmo

Chalmers, Department of Thermo and Fluid Dynamics

Bert Johansson

Chalmers, Department of Thermo and Fluid Dynamics

Applied Scientific Research

Vol. 51

Subject Categories

Fluid Mechanics and Acoustics

More information