Advertisement

Springer Nature is making Coronavirus research free. View research | View latest news | Sign up for updates

A silicon transducer for the determination of wall-pressure fluctuations in turbulent boundary layers

  • 26 Accesses

  • 8 Citations

Abstract

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 5/3-law of Kolmogorov, and the normalized wall pressure fluctuations agreed well with other direct measurements.

This is a preview of subscription content, log in to check access.

References

  1. 1.

    Bull, M.K.: 1967, ‘Wall-Pressure Fluctuations Associated with Subsonic Turbulent Boundary Layer Flow’,J. Fluid Mech. 28, 719–754

  2. 2.

    Bull, M. K. and Thomas, A. S. W.: 1976, ‘High Frequency Wall-Pressure Fluctuations in Turbulent Boundary Layers’,Phys. Fluids 19, 597–599

  3. 3.

    Emmerling, R.: 1973, Report No. 9, Max-Planck-Institut für Strömungsforschung

  4. 4.

    Löfdahl, L., Stemme, G. and Johansson, B.: 1992, ‘Silicon Based Flow Sensors used for Mean Velocity and Turbulence Measurements’,Exp. in Fluids 12, 270–276

  5. 5.

    Schewe, G.: 1983, ‘On the Structure and Resolution of Wall-Pressure Fluctuations Associated with Turbulent Boundary-Layer Flow’,J. Fluid Mech. 134, 311–328

  6. 6.

    Seidel, H.: 1987, ‘The Mechanism of Anisotropic Silicon Etching and its Relevance for Micromachining’,Proc. 4th Int. Conf. on Solid State Sensors and Actuators, Tokyo, Japan, 120–125

  7. 7.

    Willmarth, W.W. and Wooldridge, C.E.: 1962, ‘Measurements of the Fluctuating Pressure at the Wall beneath a thick Turbulent Boundary Layer’,J. Fluid Mech. 14, 187–210

Download references

Author information

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Löfdahl, L., Glavmo, M., Johansson, B. et al. A silicon transducer for the determination of wall-pressure fluctuations in turbulent boundary layers. Appl. Sci. Res. 51, 203–207 (1993). https://doi.org/10.1007/BF01082538

Download citation

Key words

  • silicon transducer
  • wall-pressure fluctuations
  • turbulent boundary layers