Investigation of the free turbulent swirl jet behind the axial fan
Апстракт
Experimental investigation of the free turbulent swirl jet behind the axial fan, by use of the three-component laser Doppler anemometry is presented in this paper. Axial fan generates Rankine swirl. Measurements have been performed in five vertical measuring sections downstream for one rotation number 1500 rpm. Time averaged velocity components and their profile transformation downstream were investigated. Statistical moments of the second, third and fourth order have been calculated and presented. The highest turbulence levels are reached in the central zone, more precisely - shear layer zone and in the injection zone. Skewness and flatness factors differ from normal Gaussian distributions. Turbulence swirl flow anisotropy is investigated by applying invariant maps. Most of the obtained results are positioned in the region of the three-component isotropic turbulence and axisymmetric expansion.
Кључне речи:
turbulent swirl / laser Doppler anemometry / free jet / axial fanИзвор:
Thermal Science, 2017, 21, S771-S782Издавач:
- Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd
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)
DOI: 10.2298/TSCI160417197J
ISSN: 0354-9836
WoS: 000418781900020
Scopus: 2-s2.0-85041694675
Колекције
Институција/група
Mašinski fakultetTY - JOUR AU - Janković, Novica PY - 2017 UR - https://machinery.mas.bg.ac.rs/handle/123456789/2663 AB - Experimental investigation of the free turbulent swirl jet behind the axial fan, by use of the three-component laser Doppler anemometry is presented in this paper. Axial fan generates Rankine swirl. Measurements have been performed in five vertical measuring sections downstream for one rotation number 1500 rpm. Time averaged velocity components and their profile transformation downstream were investigated. Statistical moments of the second, third and fourth order have been calculated and presented. The highest turbulence levels are reached in the central zone, more precisely - shear layer zone and in the injection zone. Skewness and flatness factors differ from normal Gaussian distributions. Turbulence swirl flow anisotropy is investigated by applying invariant maps. Most of the obtained results are positioned in the region of the three-component isotropic turbulence and axisymmetric expansion. PB - Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd T2 - Thermal Science T1 - Investigation of the free turbulent swirl jet behind the axial fan EP - S782 SP - S771 VL - 21 DO - 10.2298/TSCI160417197J ER -
@article{ author = "Janković, Novica", year = "2017", abstract = "Experimental investigation of the free turbulent swirl jet behind the axial fan, by use of the three-component laser Doppler anemometry is presented in this paper. Axial fan generates Rankine swirl. Measurements have been performed in five vertical measuring sections downstream for one rotation number 1500 rpm. Time averaged velocity components and their profile transformation downstream were investigated. Statistical moments of the second, third and fourth order have been calculated and presented. The highest turbulence levels are reached in the central zone, more precisely - shear layer zone and in the injection zone. Skewness and flatness factors differ from normal Gaussian distributions. Turbulence swirl flow anisotropy is investigated by applying invariant maps. Most of the obtained results are positioned in the region of the three-component isotropic turbulence and axisymmetric expansion.", publisher = "Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd", journal = "Thermal Science", title = "Investigation of the free turbulent swirl jet behind the axial fan", pages = "S782-S771", volume = "21", doi = "10.2298/TSCI160417197J" }
Janković, N.. (2017). Investigation of the free turbulent swirl jet behind the axial fan. in Thermal Science Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd., 21, S771-S782. https://doi.org/10.2298/TSCI160417197J
Janković N. Investigation of the free turbulent swirl jet behind the axial fan. in Thermal Science. 2017;21:S771-S782. doi:10.2298/TSCI160417197J .
Janković, Novica, "Investigation of the free turbulent swirl jet behind the axial fan" in Thermal Science, 21 (2017):S771-S782, https://doi.org/10.2298/TSCI160417197J . .