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Fine structure of fluctuating fields in a wake

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Abstract

A semiempirical calculation is made of the root-mean-square values, scales, and spectra of fluctuating fields in the wake behind a body. The spectra and scales are represented by using the well-known results obtained for Isotropie turbulence in an incompressible fluid. Closure of the problem is achieved through the use of turbulent energy balance equations and root-mean-squares of fluctuating scalar fields. The wake parameters are calculated by means of an explicit finite-difference scheme. In contrast to standard computational methods, down-stream does not involve an increase in the number of nodes in the computational mesh in the radial direction because special variables are introduced into the equations. The calculated results for the rms values and the spectra of fluctuating density and electron-density fields in a hypersonic wake are compared to well-known experimental data.

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Literature cited

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  1. Leningrad

    L. I. Skurin

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  1. L. I. Skurin
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Translated from Izvestiya Akademii Nauk SSSR, Mekhanika Zhidkosti i Gaza, No. 3, pp. 14–21, May–June, 1975.

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Skurin, L.I. Fine structure of fluctuating fields in a wake. Fluid Dyn 10, 376–382 (1975). https://doi.org/10.1007/BF01015259

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  • DOI: https://doi.org/10.1007/BF01015259

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