Turbulence Structure and Dynamics Investigation of Turbulent Swirl Flow in Pipe Using High-Speed Stereo PIV Data
Turbulent swirl flow, which exists in numerous turbomachinery systems, is the focus of this paper. It consumes a significant amount of energy, so it is a subject of investigation for many researchers. It is even more present in ventilation systems, as numerous axial fans are still installed without...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-07-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/15/15/5417 |
| _version_ | 1797414096283369472 |
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| author | Djordje S. Čantrak Novica Z. Janković |
| author_facet | Djordje S. Čantrak Novica Z. Janković |
| author_sort | Djordje S. Čantrak |
| collection | DOAJ |
| description | Turbulent swirl flow, which exists in numerous turbomachinery systems, is the focus of this paper. It consumes a significant amount of energy, so it is a subject of investigation for many researchers. It is even more present in ventilation systems, as numerous axial fans are still installed without guide vanes. The experimental investigation of the turbulent swirl flow behind an axial fan in a pipe, installed in a test rig with a free inlet and ducted outlet, as defined in the international standard ISO 5801, is presented in this paper. Moreover, in this paper, the axially restricted case is studied. A designed axial fan generates a Rankine vortex with a complex structure, and research on the vortex turbulence structure and dynamics is presented. On the basis of the HSS PIV (high-speed stereo particle image velocimetry), measurement results are calculated using invariant maps. All states of turbulence anisotropy are thoroughly analyzed by applying the invariant theory on HSS PIV results. Vortex dynamics is observed on the basis of the total velocity minima positions and their repetitions. Both methods are correlated, and important conclusions regarding vortex behavior are deduced. |
| first_indexed | 2024-03-09T05:28:10Z |
| format | Article |
| id | doaj.art-40dd2692808e439484997d86b5b11634 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-09T05:28:10Z |
| publishDate | 2022-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-40dd2692808e439484997d86b5b116342023-12-03T12:34:57ZengMDPI AGEnergies1996-10732022-07-011515541710.3390/en15155417Turbulence Structure and Dynamics Investigation of Turbulent Swirl Flow in Pipe Using High-Speed Stereo PIV DataDjordje S. Čantrak0Novica Z. Janković1University of Belgrade, Faculty of Mechanical Engineering, Hydraulic Machinery and Energy Systems Department, Kraljice Marije 16, 11120 Belgrade, SerbiaUniversity of Belgrade, Faculty of Mechanical Engineering, Hydraulic Machinery and Energy Systems Department, Kraljice Marije 16, 11120 Belgrade, SerbiaTurbulent swirl flow, which exists in numerous turbomachinery systems, is the focus of this paper. It consumes a significant amount of energy, so it is a subject of investigation for many researchers. It is even more present in ventilation systems, as numerous axial fans are still installed without guide vanes. The experimental investigation of the turbulent swirl flow behind an axial fan in a pipe, installed in a test rig with a free inlet and ducted outlet, as defined in the international standard ISO 5801, is presented in this paper. Moreover, in this paper, the axially restricted case is studied. A designed axial fan generates a Rankine vortex with a complex structure, and research on the vortex turbulence structure and dynamics is presented. On the basis of the HSS PIV (high-speed stereo particle image velocimetry), measurement results are calculated using invariant maps. All states of turbulence anisotropy are thoroughly analyzed by applying the invariant theory on HSS PIV results. Vortex dynamics is observed on the basis of the total velocity minima positions and their repetitions. Both methods are correlated, and important conclusions regarding vortex behavior are deduced.https://www.mdpi.com/1996-1073/15/15/5417turbulent swirl flowaxial fanvortex dynamicsinvariant mapshigh-speed PIV |
| spellingShingle | Djordje S. Čantrak Novica Z. Janković Turbulence Structure and Dynamics Investigation of Turbulent Swirl Flow in Pipe Using High-Speed Stereo PIV Data Energies turbulent swirl flow axial fan vortex dynamics invariant maps high-speed PIV |
| title | Turbulence Structure and Dynamics Investigation of Turbulent Swirl Flow in Pipe Using High-Speed Stereo PIV Data |
| title_full | Turbulence Structure and Dynamics Investigation of Turbulent Swirl Flow in Pipe Using High-Speed Stereo PIV Data |
| title_fullStr | Turbulence Structure and Dynamics Investigation of Turbulent Swirl Flow in Pipe Using High-Speed Stereo PIV Data |
| title_full_unstemmed | Turbulence Structure and Dynamics Investigation of Turbulent Swirl Flow in Pipe Using High-Speed Stereo PIV Data |
| title_short | Turbulence Structure and Dynamics Investigation of Turbulent Swirl Flow in Pipe Using High-Speed Stereo PIV Data |
| title_sort | turbulence structure and dynamics investigation of turbulent swirl flow in pipe using high speed stereo piv data |
| topic | turbulent swirl flow axial fan vortex dynamics invariant maps high-speed PIV |
| url | https://www.mdpi.com/1996-1073/15/15/5417 |
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