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TsAGI Science Journal

ISSN Печать: 1948-2590
ISSN Онлайн: 1948-2604

TsAGI Science Journal

DOI: 10.1615/TsAGISciJ.v40.i2.70
pages 241-253

DEVELOPMENT OF A MEASURING TECHNIQUE FOR THE LOW-WAVENUMBER COMPONENTS OF THE WAVENUMBER-FREQUENCY SPECTRUM OF TURBULENT WALL PRESSURE FLUCTUATIONS

A. N. Kotov
Central Aerohydrodynamic Institute (TsAGI) 1, Zhukovsky str., Zhukovsky, 140180, Moscow region, Russia

Краткое описание

The main sources of errors impeding measurement of the wavenumber-frequency spectrum of wall pressure fluctuations of turbulent boundary layers in low-wavenumber regions are analyzed. Such measurements are necessary for the calculation of fuselage skin vibrations related to its inertial excitation, and for the evaluation of noise levels in the cabin caused by these vibrations. The evaluations and the dependencies of flow parameters and the measuring system are obtained for each source of error. Based on models of the wavenumber-frequency spectrum, the author validates the applicability range of different antennas and develops an optimization method of arranging the pressure sensors which enables accurate measurements using the minimum number of transducers both for one- and two-dimensional cases.

ЛИТЕРАТУРА

  1. Smolyakov, A. V. and Tkachenko, V. M., Models of the field of pseudo-sound turbulent wall pressures and the corresponding experimental data.

  2. Sherman, C. H., Sung, H. K., and Buehler, B. G., Measurement of the turbulent boundary layer wave-vector spectrum.

  3. Long, D. R., Effect of nozzle geometry on turbofan shock cell noise at cruise.

  4. Hinchin, A. Ya., Theory of the correlation of stationary stochastic processes.

  5. Corcos, G. M., The resolution of turbulent pressures at the wall of boundary layer.

  6. Corcos, G. M., The structure of the turbulent pressure field in boundary-layer flows.

  7. Efimtsov, Â. Ì., Characteristics of a field of wall turbulent fluctuations of pressure at high Reynolds numbers.

  8. Efimtsov, Â. Ì., Similarity criteria of the spectra of wall pressure fluctuation of turbulent boundary layer.


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