Laser insight into the turbulent swirl flow behind the axial flow fan
Само за регистроване кориснике
2014
Конференцијски прилог (Објављена верзија)
Метаподаци
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Complex experimental study of the turbulent swirl flow behind the axial fan is reported in this paper. Axial fan with nine blades, designed to generate Rankine vortex, was positioned in the circular pipe entrance transparent section with profiled free bell mouth inlet Two test rigs were built in order to study the turbulent swirl flow generated on the axial fan pressure side in the case of axially unrestricted and restricted swirl flows. One-component laser Doppler anemometry (LDA) and stereo particle image velocimetry (SPIV) were used in the first test rig in the measuring section 3.35D, measured from the test rig inlet One of the latest measurement techniques, high speed SPIV (HSS PIV), was used for the measurements in the second test rig in the section 2.1D downstream the fan's trailing edge. Achieved Reynolds numbers in the first test rig are Re=182600 and 277020, while in the second Re=186463. Turbulent velocity field non-homogeneity and anisotropy is revealed using the LDA system.... Calculated turbulent statistical properties, such as moments of the second and higher orders, reveal complex mechanisms in turbulent swirl flow. It is shown for the used axial fan construction that swirl number has almost constant value for two various duty points generated by changing rotation number. Study of the instant and mean velocity fields obtained using SPIV discovers vortex core dynamics. Obtained percentage of the unique positions of the total velocity minimum are 10% for the first regime, while 11.5% for the second regime in the first test rig. HSS PIV experimental results have also shown the three-dimensionality and non-homogeneity of generated turbulent swirl flow. Experimentally determined and calculated invariant maps revealed three-component isotropic turbulence in the vortex core region.
Извор:
Proceedings of the ASME Turbo Expo, 2014, 1AИздавач:
- American Society of Mechanical Engineers (ASME)
Финансирање / пројекти:
- Примена савремених мерних и прорачунских техника за изучавање струјних параметара вентилационих система на моделу енергетски изузетно ефикасног (пасивног) објекта (RS-MESTD-Technological Development (TD or TR)-35046)
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Институција/група
Mašinski fakultetTY - CONF AU - Čantrak, Đorđe AU - Janković, Novica AU - Lečić, Milan PY - 2014 UR - https://machinery.mas.bg.ac.rs/handle/123456789/1984 AB - Complex experimental study of the turbulent swirl flow behind the axial fan is reported in this paper. Axial fan with nine blades, designed to generate Rankine vortex, was positioned in the circular pipe entrance transparent section with profiled free bell mouth inlet Two test rigs were built in order to study the turbulent swirl flow generated on the axial fan pressure side in the case of axially unrestricted and restricted swirl flows. One-component laser Doppler anemometry (LDA) and stereo particle image velocimetry (SPIV) were used in the first test rig in the measuring section 3.35D, measured from the test rig inlet One of the latest measurement techniques, high speed SPIV (HSS PIV), was used for the measurements in the second test rig in the section 2.1D downstream the fan's trailing edge. Achieved Reynolds numbers in the first test rig are Re=182600 and 277020, while in the second Re=186463. Turbulent velocity field non-homogeneity and anisotropy is revealed using the LDA system. Calculated turbulent statistical properties, such as moments of the second and higher orders, reveal complex mechanisms in turbulent swirl flow. It is shown for the used axial fan construction that swirl number has almost constant value for two various duty points generated by changing rotation number. Study of the instant and mean velocity fields obtained using SPIV discovers vortex core dynamics. Obtained percentage of the unique positions of the total velocity minimum are 10% for the first regime, while 11.5% for the second regime in the first test rig. HSS PIV experimental results have also shown the three-dimensionality and non-homogeneity of generated turbulent swirl flow. Experimentally determined and calculated invariant maps revealed three-component isotropic turbulence in the vortex core region. PB - American Society of Mechanical Engineers (ASME) C3 - Proceedings of the ASME Turbo Expo T1 - Laser insight into the turbulent swirl flow behind the axial flow fan VL - 1A DO - 10.1115/GT2014-26563 ER -
@conference{ author = "Čantrak, Đorđe and Janković, Novica and Lečić, Milan", year = "2014", abstract = "Complex experimental study of the turbulent swirl flow behind the axial fan is reported in this paper. Axial fan with nine blades, designed to generate Rankine vortex, was positioned in the circular pipe entrance transparent section with profiled free bell mouth inlet Two test rigs were built in order to study the turbulent swirl flow generated on the axial fan pressure side in the case of axially unrestricted and restricted swirl flows. One-component laser Doppler anemometry (LDA) and stereo particle image velocimetry (SPIV) were used in the first test rig in the measuring section 3.35D, measured from the test rig inlet One of the latest measurement techniques, high speed SPIV (HSS PIV), was used for the measurements in the second test rig in the section 2.1D downstream the fan's trailing edge. Achieved Reynolds numbers in the first test rig are Re=182600 and 277020, while in the second Re=186463. Turbulent velocity field non-homogeneity and anisotropy is revealed using the LDA system. Calculated turbulent statistical properties, such as moments of the second and higher orders, reveal complex mechanisms in turbulent swirl flow. It is shown for the used axial fan construction that swirl number has almost constant value for two various duty points generated by changing rotation number. Study of the instant and mean velocity fields obtained using SPIV discovers vortex core dynamics. Obtained percentage of the unique positions of the total velocity minimum are 10% for the first regime, while 11.5% for the second regime in the first test rig. HSS PIV experimental results have also shown the three-dimensionality and non-homogeneity of generated turbulent swirl flow. Experimentally determined and calculated invariant maps revealed three-component isotropic turbulence in the vortex core region.", publisher = "American Society of Mechanical Engineers (ASME)", journal = "Proceedings of the ASME Turbo Expo", title = "Laser insight into the turbulent swirl flow behind the axial flow fan", volume = "1A", doi = "10.1115/GT2014-26563" }
Čantrak, Đ., Janković, N.,& Lečić, M.. (2014). Laser insight into the turbulent swirl flow behind the axial flow fan. in Proceedings of the ASME Turbo Expo American Society of Mechanical Engineers (ASME)., 1A. https://doi.org/10.1115/GT2014-26563
Čantrak Đ, Janković N, Lečić M. Laser insight into the turbulent swirl flow behind the axial flow fan. in Proceedings of the ASME Turbo Expo. 2014;1A. doi:10.1115/GT2014-26563 .
Čantrak, Đorđe, Janković, Novica, Lečić, Milan, "Laser insight into the turbulent swirl flow behind the axial flow fan" in Proceedings of the ASME Turbo Expo, 1A (2014), https://doi.org/10.1115/GT2014-26563 . .