TY  - CONF
AU  - Čantrak, Đorđe
AU  - Janković, Novica
PY  - 2013
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/6356
AB  - Complex structure of the three dimensional, inhomogeneous and anisotropic turbulent shear flow, generated on the axial fan pressure side, is studied in this paper. Here are reported measurements with laser Doppler anemometry (LDA) system behind the axial fan impeller in pipe for three various Reynolds numbers (Re=164020, 254010 and 343150). Three velocity components are successively measured. Influence of the axial fan rotation number, i.e. correspondent Reynolds number, on the statistical properties of the generated field of circumferential, axial and radial fluctuating velocities is studied in this paper. Namely, these statistical parameters are level of turbulence, skewness and flatness factors. Volume flow rate, average circulation, swirl number and other integral parameters are calculated on the basis of axial and circumferential velocities distributions. Distribution of the averaged circumferential velocity corresponds to the "solid body" rotation with an almost uniform rotation. It is found that the dimensionless mean velocity profiles for all three velocity components are independent of all three Reynolds numbers. It is almost the same situation for levels of turbulence, skewness and flatness factors, especially for two higher Reynolds numbers. This will be discussed in the paper. The highest levels of turbulence are reached in the central region, what is the most distinguished for circumferential velocity. The highest data sampling rates are achieved also for the circumferential velocity. Anisotropy is evident in all flow regions. In addition are calculated turbulence time scales on the basis of the normalized autocorrelation functions. This reveals turbulence structure in the cross-section
PB  - Српско друштво за механику
C3  - 4th International Congress of Serbian Society of Mechanics, Proceedings, Vrnjačka Banja, Serbia, 4-7 June,
T1  - Reynolds Number Influence on the Statistical Characteristics of Turbulent Swirl Flow
SP  - 273
UR  - https://hdl.handle.net/21.15107/rcub_machinery_6356
ER  - 

@conference{
author = "Čantrak, Đorđe and Janković, Novica",
year = "2013",
abstract = "Complex structure of the three dimensional, inhomogeneous and anisotropic turbulent shear flow, generated on the axial fan pressure side, is studied in this paper. Here are reported measurements with laser Doppler anemometry (LDA) system behind the axial fan impeller in pipe for three various Reynolds numbers (Re=164020, 254010 and 343150). Three velocity components are successively measured. Influence of the axial fan rotation number, i.e. correspondent Reynolds number, on the statistical properties of the generated field of circumferential, axial and radial fluctuating velocities is studied in this paper. Namely, these statistical parameters are level of turbulence, skewness and flatness factors. Volume flow rate, average circulation, swirl number and other integral parameters are calculated on the basis of axial and circumferential velocities distributions. Distribution of the averaged circumferential velocity corresponds to the "solid body" rotation with an almost uniform rotation. It is found that the dimensionless mean velocity profiles for all three velocity components are independent of all three Reynolds numbers. It is almost the same situation for levels of turbulence, skewness and flatness factors, especially for two higher Reynolds numbers. This will be discussed in the paper. The highest levels of turbulence are reached in the central region, what is the most distinguished for circumferential velocity. The highest data sampling rates are achieved also for the circumferential velocity. Anisotropy is evident in all flow regions. In addition are calculated turbulence time scales on the basis of the normalized autocorrelation functions. This reveals turbulence structure in the cross-section",
publisher = "Српско друштво за механику",
journal = "4th International Congress of Serbian Society of Mechanics, Proceedings, Vrnjačka Banja, Serbia, 4-7 June,",
title = "Reynolds Number Influence on the Statistical Characteristics of Turbulent Swirl Flow",
pages = "273",
url = "https://hdl.handle.net/21.15107/rcub_machinery_6356"
}

Čantrak, Đ.,& Janković, N.. (2013). Reynolds Number Influence on the Statistical Characteristics of Turbulent Swirl Flow. in 4th International Congress of Serbian Society of Mechanics, Proceedings, Vrnjačka Banja, Serbia, 4-7 June,
Српско друштво за механику., 273.
https://hdl.handle.net/21.15107/rcub_machinery_6356

Čantrak Đ, Janković N. Reynolds Number Influence on the Statistical Characteristics of Turbulent Swirl Flow. in 4th International Congress of Serbian Society of Mechanics, Proceedings, Vrnjačka Banja, Serbia, 4-7 June,. 2013;:273.
https://hdl.handle.net/21.15107/rcub_machinery_6356 .

Čantrak, Đorđe, Janković, Novica, "Reynolds Number Influence on the Statistical Characteristics of Turbulent Swirl Flow" in 4th International Congress of Serbian Society of Mechanics, Proceedings, Vrnjačka Banja, Serbia, 4-7 June, (2013):273,
https://hdl.handle.net/21.15107/rcub_machinery_6356 .