Simulating transitional and turbulent flow around airfoils at medium angles-of-attack
Само за регистроване кориснике
2021
Конференцијски прилог (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
Investigated topic of the presented research is transitional and turbulent flow around smallscale
propeller blade airfoils that are characterized by small chords, low speeds and therefore, low
Reynolds numbers. Here, an airfoil of medium relative thickness designed for nominal operating
conditions of 0.3 MRe is considered. Prior studies by simpler computational models (including
panel methods and 2D CFD simulations) have demonstrated that best lift-to-drag ratio (that is the
desired working regime) ranging from 60 to 80 can be achieved at angles-of-attack 4-6°. Here,
that observation is checked by more advanced turbulence models that incorporate the resolution
of at least a portion of turbulence spectrum, in particular transition SST scale-adaptive simulation
(SAS). Such complex turbulence models require 3D models and quite refined computational
grids. Furthermore, the necessary computational effort is truly enormous due to small time-steps
and slow convergence. The conducted... computational process is presented and explained. Various
obtained results, both quantitative and qualitative, are provided. In the end, it can be concluded
that the choice of turbulence modeling (and/or resolving) greatly affects the final output, even at
medium angles-of-attack where laminar, attached flow dominates. Distinctive flow phenomena
still exist, and in order to be adequately simulated, a comprehensive modeling approach should be
adopted.
Кључне речи:
airfoil / flow computation / transition / turbulence / medium AoAИзвор:
Proceedings / The 8th International Congress of Serbian Society of Mechanics, Kragujevac, Serbia, June 28-30, 2021, 2021, 519-526Издавач:
- Belgrade : Serbian Society of Mechanics
Финансирање / пројекти:
- Министарство науке, технолошког развоја и иновација Републике Србије, институционално финансирање - 200105 (Универзитет у Београду, Машински факултет) (RS-MESTD-inst-2020-200105)
Колекције
Институција/група
Mašinski fakultetTY - CONF AU - Svorcan, Jelena AU - Hasan, Mohammad Sakib AU - Tanović, Dragoljub Lj. AU - Popović, Lazar PY - 2021 UR - https://machinery.mas.bg.ac.rs/handle/123456789/4216 AB - Investigated topic of the presented research is transitional and turbulent flow around smallscale propeller blade airfoils that are characterized by small chords, low speeds and therefore, low Reynolds numbers. Here, an airfoil of medium relative thickness designed for nominal operating conditions of 0.3 MRe is considered. Prior studies by simpler computational models (including panel methods and 2D CFD simulations) have demonstrated that best lift-to-drag ratio (that is the desired working regime) ranging from 60 to 80 can be achieved at angles-of-attack 4-6°. Here, that observation is checked by more advanced turbulence models that incorporate the resolution of at least a portion of turbulence spectrum, in particular transition SST scale-adaptive simulation (SAS). Such complex turbulence models require 3D models and quite refined computational grids. Furthermore, the necessary computational effort is truly enormous due to small time-steps and slow convergence. The conducted computational process is presented and explained. Various obtained results, both quantitative and qualitative, are provided. In the end, it can be concluded that the choice of turbulence modeling (and/or resolving) greatly affects the final output, even at medium angles-of-attack where laminar, attached flow dominates. Distinctive flow phenomena still exist, and in order to be adequately simulated, a comprehensive modeling approach should be adopted. PB - Belgrade : Serbian Society of Mechanics C3 - Proceedings / The 8th International Congress of Serbian Society of Mechanics, Kragujevac, Serbia, June 28-30, 2021 T1 - Simulating transitional and turbulent flow around airfoils at medium angles-of-attack EP - 526 SP - 519 UR - https://hdl.handle.net/21.15107/rcub_machinery_4216 ER -
@conference{ author = "Svorcan, Jelena and Hasan, Mohammad Sakib and Tanović, Dragoljub Lj. and Popović, Lazar", year = "2021", abstract = "Investigated topic of the presented research is transitional and turbulent flow around smallscale propeller blade airfoils that are characterized by small chords, low speeds and therefore, low Reynolds numbers. Here, an airfoil of medium relative thickness designed for nominal operating conditions of 0.3 MRe is considered. Prior studies by simpler computational models (including panel methods and 2D CFD simulations) have demonstrated that best lift-to-drag ratio (that is the desired working regime) ranging from 60 to 80 can be achieved at angles-of-attack 4-6°. Here, that observation is checked by more advanced turbulence models that incorporate the resolution of at least a portion of turbulence spectrum, in particular transition SST scale-adaptive simulation (SAS). Such complex turbulence models require 3D models and quite refined computational grids. Furthermore, the necessary computational effort is truly enormous due to small time-steps and slow convergence. The conducted computational process is presented and explained. Various obtained results, both quantitative and qualitative, are provided. In the end, it can be concluded that the choice of turbulence modeling (and/or resolving) greatly affects the final output, even at medium angles-of-attack where laminar, attached flow dominates. Distinctive flow phenomena still exist, and in order to be adequately simulated, a comprehensive modeling approach should be adopted.", publisher = "Belgrade : Serbian Society of Mechanics", journal = "Proceedings / The 8th International Congress of Serbian Society of Mechanics, Kragujevac, Serbia, June 28-30, 2021", title = "Simulating transitional and turbulent flow around airfoils at medium angles-of-attack", pages = "526-519", url = "https://hdl.handle.net/21.15107/rcub_machinery_4216" }
Svorcan, J., Hasan, M. S., Tanović, D. Lj.,& Popović, L.. (2021). Simulating transitional and turbulent flow around airfoils at medium angles-of-attack. in Proceedings / The 8th International Congress of Serbian Society of Mechanics, Kragujevac, Serbia, June 28-30, 2021 Belgrade : Serbian Society of Mechanics., 519-526. https://hdl.handle.net/21.15107/rcub_machinery_4216
Svorcan J, Hasan MS, Tanović DL, Popović L. Simulating transitional and turbulent flow around airfoils at medium angles-of-attack. in Proceedings / The 8th International Congress of Serbian Society of Mechanics, Kragujevac, Serbia, June 28-30, 2021. 2021;:519-526. https://hdl.handle.net/21.15107/rcub_machinery_4216 .
Svorcan, Jelena, Hasan, Mohammad Sakib, Tanović, Dragoljub Lj., Popović, Lazar, "Simulating transitional and turbulent flow around airfoils at medium angles-of-attack" in Proceedings / The 8th International Congress of Serbian Society of Mechanics, Kragujevac, Serbia, June 28-30, 2021 (2021):519-526, https://hdl.handle.net/21.15107/rcub_machinery_4216 .