Experimental Investigations of the Flow Uniformity and Jet Development on the Free Jet Calibration Wind Tunnel
2019
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Конференцијски прилог (Објављена верзија)
Метаподаци
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Results of experimental investigations of the flow uniformity and axisymmetric jet development on the free jet wind calibration tunnel are presented in this paper. At the outlet of calibration tunnel a profiled Witoshinsky nozzle is located, with outlet diameter of D = 145 mm. Flow uniformity measurement for 34 flow regimes was conducted, in the jet cross-section located at horizontal distance of x = 30 mm from the outlet of the nozzle. Velocity profile measurements were performed with Pitot probes. Based on the measurement results for the calibration tunnel, it can be concluded that flow is uniform to within ± 1 % across the test section with radius of 58-60 mm. In addition, development of the jet in the near-field region (0 < s/D < 4.828) is investigated by measurements of mean velocity profile in several streamwise cross-sections for four different regimes. Axisymmetric nature of the jet is proved. It was also shown that velocity profiles in the jet core are uniform, as well as that... the jet geometry does not depend on the air flow velocity. This confirms calibration possibilities of this free jet calibration wind tunnel for velocity probes of various types.
Кључне речи:
wind tunnels / uniformity / jet / jet coreИзвор:
The 7th International Congress of Serbian Society of Mechanics, Sremski Karlovci, Serbia, June 24-26 2019., Proceedings, Minisymposium M3: Turbulence, Eds.: Lazarević M. et al., paper No. M3e, 6 pages., 2019Издавач:
- Serbian Society of Mechanics
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)
Колекције
Институција/група
Mašinski fakultetTY - CONF AU - Ilić, Dejan AU - Čantrak, Đorđe AU - Janković, Novica AU - Pajić, Milan PY - 2019 UR - https://machinery.mas.bg.ac.rs/handle/123456789/5258 AB - Results of experimental investigations of the flow uniformity and axisymmetric jet development on the free jet wind calibration tunnel are presented in this paper. At the outlet of calibration tunnel a profiled Witoshinsky nozzle is located, with outlet diameter of D = 145 mm. Flow uniformity measurement for 34 flow regimes was conducted, in the jet cross-section located at horizontal distance of x = 30 mm from the outlet of the nozzle. Velocity profile measurements were performed with Pitot probes. Based on the measurement results for the calibration tunnel, it can be concluded that flow is uniform to within ± 1 % across the test section with radius of 58-60 mm. In addition, development of the jet in the near-field region (0 < s/D < 4.828) is investigated by measurements of mean velocity profile in several streamwise cross-sections for four different regimes. Axisymmetric nature of the jet is proved. It was also shown that velocity profiles in the jet core are uniform, as well as that the jet geometry does not depend on the air flow velocity. This confirms calibration possibilities of this free jet calibration wind tunnel for velocity probes of various types. PB - Serbian Society of Mechanics C3 - The 7th International Congress of Serbian Society of Mechanics, Sremski Karlovci, Serbia, June 24-26 2019., Proceedings, Minisymposium M3: Turbulence, Eds.: Lazarević M. et al., paper No. M3e, 6 pages. T1 - Experimental Investigations of the Flow Uniformity and Jet Development on the Free Jet Calibration Wind Tunnel UR - https://hdl.handle.net/21.15107/rcub_machinery_5258 ER -
@conference{ author = "Ilić, Dejan and Čantrak, Đorđe and Janković, Novica and Pajić, Milan", year = "2019", abstract = "Results of experimental investigations of the flow uniformity and axisymmetric jet development on the free jet wind calibration tunnel are presented in this paper. At the outlet of calibration tunnel a profiled Witoshinsky nozzle is located, with outlet diameter of D = 145 mm. Flow uniformity measurement for 34 flow regimes was conducted, in the jet cross-section located at horizontal distance of x = 30 mm from the outlet of the nozzle. Velocity profile measurements were performed with Pitot probes. Based on the measurement results for the calibration tunnel, it can be concluded that flow is uniform to within ± 1 % across the test section with radius of 58-60 mm. In addition, development of the jet in the near-field region (0 < s/D < 4.828) is investigated by measurements of mean velocity profile in several streamwise cross-sections for four different regimes. Axisymmetric nature of the jet is proved. It was also shown that velocity profiles in the jet core are uniform, as well as that the jet geometry does not depend on the air flow velocity. This confirms calibration possibilities of this free jet calibration wind tunnel for velocity probes of various types.", publisher = "Serbian Society of Mechanics", journal = "The 7th International Congress of Serbian Society of Mechanics, Sremski Karlovci, Serbia, June 24-26 2019., Proceedings, Minisymposium M3: Turbulence, Eds.: Lazarević M. et al., paper No. M3e, 6 pages.", title = "Experimental Investigations of the Flow Uniformity and Jet Development on the Free Jet Calibration Wind Tunnel", url = "https://hdl.handle.net/21.15107/rcub_machinery_5258" }
Ilić, D., Čantrak, Đ., Janković, N.,& Pajić, M.. (2019). Experimental Investigations of the Flow Uniformity and Jet Development on the Free Jet Calibration Wind Tunnel. in The 7th International Congress of Serbian Society of Mechanics, Sremski Karlovci, Serbia, June 24-26 2019., Proceedings, Minisymposium M3: Turbulence, Eds.: Lazarević M. et al., paper No. M3e, 6 pages. Serbian Society of Mechanics.. https://hdl.handle.net/21.15107/rcub_machinery_5258
Ilić D, Čantrak Đ, Janković N, Pajić M. Experimental Investigations of the Flow Uniformity and Jet Development on the Free Jet Calibration Wind Tunnel. in The 7th International Congress of Serbian Society of Mechanics, Sremski Karlovci, Serbia, June 24-26 2019., Proceedings, Minisymposium M3: Turbulence, Eds.: Lazarević M. et al., paper No. M3e, 6 pages.. 2019;. https://hdl.handle.net/21.15107/rcub_machinery_5258 .
Ilić, Dejan, Čantrak, Đorđe, Janković, Novica, Pajić, Milan, "Experimental Investigations of the Flow Uniformity and Jet Development on the Free Jet Calibration Wind Tunnel" in The 7th International Congress of Serbian Society of Mechanics, Sremski Karlovci, Serbia, June 24-26 2019., Proceedings, Minisymposium M3: Turbulence, Eds.: Lazarević M. et al., paper No. M3e, 6 pages. (2019), https://hdl.handle.net/21.15107/rcub_machinery_5258 .