Uncertainty Analysis of 3D LDA System
Само за регистроване кориснике
2019
Аутори
Ilić, JelenaJanković, Novica
Ristić, Slavica
Čantrak, Đorđe
Остала ауторства
Lazarević, MihailoКонференцијски прилог (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
The uncertainty of three component laser Doppler anemometry (LDA), applied to investigation of the turbulent swirl flow in jet behind the axial fan is considered. The main sources of uncertainties are identified and estimated. They can be classified into two groups: one associated to single component velocity measurement, and the other, generated by LDA probes settings. Expressions for axial, radial and circumferential velocity component uncertainties are derived. They show that for velocity components that are not measured directly, but are calculated using transformation matrix (here axial and circumferential component), uncertainties depend on their ratio. For specific setting of LDA probes, uncertainty dependences on component value ratios are calculated. The results show that, for small velocity component ratio, impact of beam separation uncertainty and the uncertainty due to fringe distortion on measurement result is comparable to the impact of the uncertainty of angular posi...tions of probes. The latter is remarkably dominant if the velocity component if the velocity component ratio is high, which is the case in some area of the here considered swirl flow. That indicates the importance of precise angular positioning in 3D LDA systems.
Кључне речи:
laser Doppler anemometry / uncertainty / turbulenceИзвор:
7th International Congress of Serbian Society of Mechanics, Sremski Karlovci, Serbia, June 24-26, 2019, 2019Издавач:
- Beograd: Srpsko društvo za mehaniku
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, Jelena AU - Janković, Novica AU - Ristić, Slavica AU - Čantrak, Đorđe PY - 2019 UR - https://machinery.mas.bg.ac.rs/handle/123456789/5695 AB - The uncertainty of three component laser Doppler anemometry (LDA), applied to investigation of the turbulent swirl flow in jet behind the axial fan is considered. The main sources of uncertainties are identified and estimated. They can be classified into two groups: one associated to single component velocity measurement, and the other, generated by LDA probes settings. Expressions for axial, radial and circumferential velocity component uncertainties are derived. They show that for velocity components that are not measured directly, but are calculated using transformation matrix (here axial and circumferential component), uncertainties depend on their ratio. For specific setting of LDA probes, uncertainty dependences on component value ratios are calculated. The results show that, for small velocity component ratio, impact of beam separation uncertainty and the uncertainty due to fringe distortion on measurement result is comparable to the impact of the uncertainty of angular positions of probes. The latter is remarkably dominant if the velocity component if the velocity component ratio is high, which is the case in some area of the here considered swirl flow. That indicates the importance of precise angular positioning in 3D LDA systems. PB - Beograd: Srpsko društvo za mehaniku C3 - 7th International Congress of Serbian Society of Mechanics, Sremski Karlovci, Serbia, June 24-26, 2019 T1 - Uncertainty Analysis of 3D LDA System UR - https://hdl.handle.net/21.15107/rcub_machinery_5695 ER -
@conference{ author = "Ilić, Jelena and Janković, Novica and Ristić, Slavica and Čantrak, Đorđe", year = "2019", abstract = "The uncertainty of three component laser Doppler anemometry (LDA), applied to investigation of the turbulent swirl flow in jet behind the axial fan is considered. The main sources of uncertainties are identified and estimated. They can be classified into two groups: one associated to single component velocity measurement, and the other, generated by LDA probes settings. Expressions for axial, radial and circumferential velocity component uncertainties are derived. They show that for velocity components that are not measured directly, but are calculated using transformation matrix (here axial and circumferential component), uncertainties depend on their ratio. For specific setting of LDA probes, uncertainty dependences on component value ratios are calculated. The results show that, for small velocity component ratio, impact of beam separation uncertainty and the uncertainty due to fringe distortion on measurement result is comparable to the impact of the uncertainty of angular positions of probes. The latter is remarkably dominant if the velocity component if the velocity component ratio is high, which is the case in some area of the here considered swirl flow. That indicates the importance of precise angular positioning in 3D LDA systems.", publisher = "Beograd: Srpsko društvo za mehaniku", journal = "7th International Congress of Serbian Society of Mechanics, Sremski Karlovci, Serbia, June 24-26, 2019", title = "Uncertainty Analysis of 3D LDA System", url = "https://hdl.handle.net/21.15107/rcub_machinery_5695" }
Ilić, J., Janković, N., Ristić, S.,& Čantrak, Đ.. (2019). Uncertainty Analysis of 3D LDA System. in 7th International Congress of Serbian Society of Mechanics, Sremski Karlovci, Serbia, June 24-26, 2019 Beograd: Srpsko društvo za mehaniku.. https://hdl.handle.net/21.15107/rcub_machinery_5695
Ilić J, Janković N, Ristić S, Čantrak Đ. Uncertainty Analysis of 3D LDA System. in 7th International Congress of Serbian Society of Mechanics, Sremski Karlovci, Serbia, June 24-26, 2019. 2019;. https://hdl.handle.net/21.15107/rcub_machinery_5695 .
Ilić, Jelena, Janković, Novica, Ristić, Slavica, Čantrak, Đorđe, "Uncertainty Analysis of 3D LDA System" in 7th International Congress of Serbian Society of Mechanics, Sremski Karlovci, Serbia, June 24-26, 2019 (2019), https://hdl.handle.net/21.15107/rcub_machinery_5695 .