Turbulent Swirl Flow Characteristics and Vortex Core Dynamics behind Axial Fan in a Circular Pipe
Апстракт
Turbulent swirl flow field in a circular pipe behind the axial fan of specified geometry has been investigated in this paper. The length of the test rig is 27.74D, where D=0.4 m is the average inner pipe diameter. Laser-based measuring techniques, such as stereo particle image velocimetry (SPIV) and laser Doppler anemometry (LDA) were applied in this investigation. Experiments were performed in two sections, behind the axial fan at the position 3.35D from the test rig inlet and downstream at the position 26.31D. The SPIV measurements were performed in the specified cross-sections of the region size of 200x90 mm with the center in the pipe axis and vertical meridian sections of 140x85 mm in size with the center in the pipe axis. Anisotropy of the turbulent velocity field, with the focus on the vortex core region and shear layer, was related to the mean velocity fields. Complex mechanisms in this fluid flow were investigated on the basis of turbulence statistical properties. Vortex core ...dynamics was investigated using the criterion of minimum total velocity. The turbulent swirl decay law was proved based on the integral flow characteristics, such as swirl parameter and average circulation. These results will help in constituting more reliable theoretical and numerical models for the turbulent swirl flow.
Кључне речи:
LDA / stereo PIV / swirl / turbulenceИзвор:
Proceedings, Conference on Modelling Fluid Flow (CMFF’12), The 15th International Conference on Fluid Flow Technologies, Budapest, Hungary, September 4-7, Ed. J. Vad, 2012, 2Финансирање / 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)
Напомена:
- Čantrak Đ., Nedeljković M., Janković N. (2012): Turbulent Swirl Flow Characteristics and Vortex Core Dynamics behind Axial Fan in a Circular Pipe, Proceedings, Conference on Modelling Fluid Flow (CMFF’12), The 15th International Conference on Fluid Flow Technologies, Budapest, Hungary, September 4-7, Ed. J. Vad, Vol. II, pp. 749-756, ISBN 978-963-08-4587-8, CD-ROM ISBN 978-963-08-4588-5.
Колекције
Институција/група
Mašinski fakultetTY - CONF AU - Čantrak, Đorđe AU - Nedeljković, Miloš AU - Janković, Novica PY - 2012 UR - https://machinery.mas.bg.ac.rs/handle/123456789/6346 AB - Turbulent swirl flow field in a circular pipe behind the axial fan of specified geometry has been investigated in this paper. The length of the test rig is 27.74D, where D=0.4 m is the average inner pipe diameter. Laser-based measuring techniques, such as stereo particle image velocimetry (SPIV) and laser Doppler anemometry (LDA) were applied in this investigation. Experiments were performed in two sections, behind the axial fan at the position 3.35D from the test rig inlet and downstream at the position 26.31D. The SPIV measurements were performed in the specified cross-sections of the region size of 200x90 mm with the center in the pipe axis and vertical meridian sections of 140x85 mm in size with the center in the pipe axis. Anisotropy of the turbulent velocity field, with the focus on the vortex core region and shear layer, was related to the mean velocity fields. Complex mechanisms in this fluid flow were investigated on the basis of turbulence statistical properties. Vortex core dynamics was investigated using the criterion of minimum total velocity. The turbulent swirl decay law was proved based on the integral flow characteristics, such as swirl parameter and average circulation. These results will help in constituting more reliable theoretical and numerical models for the turbulent swirl flow. C3 - Proceedings, Conference on Modelling Fluid Flow (CMFF’12), The 15th International Conference on Fluid Flow Technologies, Budapest, Hungary, September 4-7, Ed. J. Vad T1 - Turbulent Swirl Flow Characteristics and Vortex Core Dynamics behind Axial Fan in a Circular Pipe VL - 2 UR - https://hdl.handle.net/21.15107/rcub_machinery_6346 ER -
@conference{ author = "Čantrak, Đorđe and Nedeljković, Miloš and Janković, Novica", year = "2012", abstract = "Turbulent swirl flow field in a circular pipe behind the axial fan of specified geometry has been investigated in this paper. The length of the test rig is 27.74D, where D=0.4 m is the average inner pipe diameter. Laser-based measuring techniques, such as stereo particle image velocimetry (SPIV) and laser Doppler anemometry (LDA) were applied in this investigation. Experiments were performed in two sections, behind the axial fan at the position 3.35D from the test rig inlet and downstream at the position 26.31D. The SPIV measurements were performed in the specified cross-sections of the region size of 200x90 mm with the center in the pipe axis and vertical meridian sections of 140x85 mm in size with the center in the pipe axis. Anisotropy of the turbulent velocity field, with the focus on the vortex core region and shear layer, was related to the mean velocity fields. Complex mechanisms in this fluid flow were investigated on the basis of turbulence statistical properties. Vortex core dynamics was investigated using the criterion of minimum total velocity. The turbulent swirl decay law was proved based on the integral flow characteristics, such as swirl parameter and average circulation. These results will help in constituting more reliable theoretical and numerical models for the turbulent swirl flow.", journal = "Proceedings, Conference on Modelling Fluid Flow (CMFF’12), The 15th International Conference on Fluid Flow Technologies, Budapest, Hungary, September 4-7, Ed. J. Vad", title = "Turbulent Swirl Flow Characteristics and Vortex Core Dynamics behind Axial Fan in a Circular Pipe", volume = "2", url = "https://hdl.handle.net/21.15107/rcub_machinery_6346" }
Čantrak, Đ., Nedeljković, M.,& Janković, N.. (2012). Turbulent Swirl Flow Characteristics and Vortex Core Dynamics behind Axial Fan in a Circular Pipe. in Proceedings, Conference on Modelling Fluid Flow (CMFF’12), The 15th International Conference on Fluid Flow Technologies, Budapest, Hungary, September 4-7, Ed. J. Vad, 2. https://hdl.handle.net/21.15107/rcub_machinery_6346
Čantrak Đ, Nedeljković M, Janković N. Turbulent Swirl Flow Characteristics and Vortex Core Dynamics behind Axial Fan in a Circular Pipe. in Proceedings, Conference on Modelling Fluid Flow (CMFF’12), The 15th International Conference on Fluid Flow Technologies, Budapest, Hungary, September 4-7, Ed. J. Vad. 2012;2. https://hdl.handle.net/21.15107/rcub_machinery_6346 .
Čantrak, Đorđe, Nedeljković, Miloš, Janković, Novica, "Turbulent Swirl Flow Characteristics and Vortex Core Dynamics behind Axial Fan in a Circular Pipe" in Proceedings, Conference on Modelling Fluid Flow (CMFF’12), The 15th International Conference on Fluid Flow Technologies, Budapest, Hungary, September 4-7, Ed. J. Vad, 2 (2012), https://hdl.handle.net/21.15107/rcub_machinery_6346 .