Influence of the outer scale of turbulence on acoustic radiation propagation in a moving turbulent atmosphere

V. V. Belov; Yu. B. Burkatovskaya; N. P. Krasnenko; L. G. Shamanaeva

doi:10.1117/12.2575041

12 November 2020 Influence of the outer scale of turbulence on acoustic radiation propagation in a moving turbulent atmosphere

V. V. Belov, Yu. B. Burkatovskaya, N. P. Krasnenko, L. G. Shamanaeva

Author Affiliations +

Proceedings Volume 11560, 26th International Symposium on Atmospheric and Ocean Optics, Atmospheric Physics; 1156019 (2020) https://doi.org/10.1117/12.2575041
Event: 26th International Symposium on Atmospheric and Ocean Optics, Atmospheric Physics, 2020, Moscow, Russian Federation

Abstract

The Monte Carlo method has been used to solve the problem on the vertical sound propagation in a plane-stratified 500- meter layer of a moving turbulent atmosphere for sound frequencies of 2 and 4 kHz. Statistical estimates of the transmitted radiation intensity are presented, and the effect of the outer scale of turbulence is investigated. The radiation souse was placed at an altitude of 35 m above the ground, and the distribution of the transmitted radiation intensity over the annular zones of the detector placed at an altitude of 500 m was calculated depending on the distance from the vertical axis in the positive (downwind) and negative (upwind) directions of the x axis coinciding with the horizontal wind direction for frequencies of 2 and 4 kHz, outer scales of turbulence L₀ = 10 and 80 m, and horizontal wind component at a weather vane altitude of 10 m changing in the range 0–10 m. It was found that the maximum of the distribution displaced by 50–300 m for F = 2 kHz and by 30–150 m for L₀ = 10 m and 50–300 m for L₀ = 80 m for F = 4 kHz. The width of the central maximum of the distribution decreases with increasing L₀, and the distribution becomes more asymmetric.

Citation Download Citation

V. V. Belov, Yu. B. Burkatovskaya, N. P. Krasnenko, and L. G. Shamanaeva "Influence of the outer scale of turbulence on acoustic radiation propagation in a moving turbulent atmosphere", Proc. SPIE 11560, 26th International Symposium on Atmospheric and Ocean Optics, Atmospheric Physics, 1156019 (12 November 2020); https://doi.org/10.1117/12.2575041

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