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A Silicon Transducer for the Determination of Wall-Pressure Fluctuations in Turbulent Boundary Layers

Lennart Löfdahl (Institutionen för termo- och fluiddynamik) ; Göran Stemme (Institutionen för tillämpad elektronik) ; Magnus Glavmo (Institutionen för termo- och fluiddynamik) ; Bert Johansson (Institutionen för termo- och fluiddynamik)
Applied Scientific Research Vol. 51 (1993),
[Artikel, refereegranskad vetenskaplig]

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.



Denna post skapades 2010-08-23.
CPL Pubid: 125053

 

Institutioner (Chalmers)

Institutionen för termo- och fluiddynamik (1989-2004)
Institutionen för tillämpad elektronik (1900-2003)

Ämnesområden

Strömningsmekanik

Chalmers infrastruktur