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Hot-Wire-Based Estimation of Pressure Fluctuations in the Near Field of a Jet in the Presence of a Coflow

  • ATMOSPHERIC AND AEROACOUSTICS
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Abstract

It is shown that the velocity fluctuation spectra measured using a hot wire in the potential flow region of the near field of a turbulent jet with a coflow can be converted into pressure fluctuation spectra. The proposed conversion method is based on the fact that the structure of instability waves, which make a decisive contribution to jet near-field fluctuations, resembles homogeneous one-dimensional waves, which makes it possible to locally link pressure fluctuations and the fluctuations of the streamwise velocity component measured by a hot wire.

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ACKNOWLEDGMENTS

The authors are grateful to V.F. Kopiev for the interest in this study and valuable comments.

Funding

The study was financially supported by the Russian Science Foundation (grant no. 19-71-10064). The experimental part of the study was carried out at the TsAGI AC-2 anechoic chamber with flow, upgraded with the financial support of the Ministry of Science and Higher Education of the Russian Federation under agreement no. 075-15-2022-1036.

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  1. Central Aerohydrodynamic Institute, Moscow Research Complex, 105005, Moscow, Russia

    O. P. Bychkov & G. A. Faranosov

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  1. O. P. Bychkov
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  2. G. A. Faranosov
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Correspondence to G. A. Faranosov.

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Bychkov, O.P., Faranosov, G.A. Hot-Wire-Based Estimation of Pressure Fluctuations in the Near Field of a Jet in the Presence of a Coflow. Acoust. Phys. 70, 116–129 (2024). https://doi.org/10.1134/S1063771023600286

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  • DOI: https://doi.org/10.1134/S1063771023600286

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