Effect of flow acceleration and initial turbulence level on velocity fluctuations

Abstract

The effect of various levels of initial turbulence on the decay of the velocity fluctuations in convergent channels with different contraction ratios has been experimentally investigated. The results of the experiments indicate that the level of turbulence has a strong influence on the longitudinal velocity fluctuations and a weaker effect on the transverse fluctuations. The experimental data demonstrate the inapplicability of the rapid distortion theory and the need for that theory to take into account the energy dissipation, the integral scale and the degree of anisotropy.

Original language	English
Pages (from-to)	624-629
Number of pages	6
Journal	Fluid Dynamics
Volume	28
Issue number	5
DOIs	https://doi.org/10.1007/BF01050044
Publication status	Published - 1 Sep 1993
Externally published	Yes

ASJC Scopus subject areas

Mechanical Engineering
Physics and Astronomy(all)
Fluid Flow and Transfer Processes

Access to Document

10.1007/BF01050044

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title = "Effect of flow acceleration and initial turbulence level on velocity fluctuations",

abstract = "The effect of various levels of initial turbulence on the decay of the velocity fluctuations in convergent channels with different contraction ratios has been experimentally investigated. The results of the experiments indicate that the level of turbulence has a strong influence on the longitudinal velocity fluctuations and a weaker effect on the transverse fluctuations. The experimental data demonstrate the inapplicability of the rapid distortion theory and the need for that theory to take into account the energy dissipation, the integral scale and the degree of anisotropy.",

author = "Lebedev, {V. P.} and Lemanov, {V. V.} and Misyura, {S. Ya} and Terekhov, {V. I.}",

year = "1993",

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doi = "10.1007/BF01050044",

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AU - Lebedev, V. P.

AU - Lemanov, V. V.

AU - Misyura, S. Ya

AU - Terekhov, V. I.

PY - 1993/9/1

Y1 - 1993/9/1

N2 - The effect of various levels of initial turbulence on the decay of the velocity fluctuations in convergent channels with different contraction ratios has been experimentally investigated. The results of the experiments indicate that the level of turbulence has a strong influence on the longitudinal velocity fluctuations and a weaker effect on the transverse fluctuations. The experimental data demonstrate the inapplicability of the rapid distortion theory and the need for that theory to take into account the energy dissipation, the integral scale and the degree of anisotropy.

AB - The effect of various levels of initial turbulence on the decay of the velocity fluctuations in convergent channels with different contraction ratios has been experimentally investigated. The results of the experiments indicate that the level of turbulence has a strong influence on the longitudinal velocity fluctuations and a weaker effect on the transverse fluctuations. The experimental data demonstrate the inapplicability of the rapid distortion theory and the need for that theory to take into account the energy dissipation, the integral scale and the degree of anisotropy.

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