Numerical investigation of Reynolds number effects on rotor aerodynamic performances in hover
Само за регистроване кориснике
2021
Конференцијски прилог (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
The main topic that is investigated in the present research is the turbulent flow around small-scale rotor blades in hovering flight condition. Small-scale rotorcraft imply somewhat specific operating conditions such as low Reynolds numbers, considerable viscous effects, degraded aerodynamic performances, flow separation, rotational flow, cyclic load cases, etc. It is therefore very important to perform as accurate as possible flow simulations that will enable obtaining practical aerodynamic data that can be used in subsequent structural and flight mechanics analyses. This paper provides the description of steps that are to be conducted when simulating hovering flow. Here, a quasi-steady approach, that combines RANS equations closed by k-ω SST turbulence model with the multiple reference frames, is adopted. Both quantitative and qualitative results are presented. Furthermore, the numerical model is validated against the obtained experimental data. The correspondence between the two set...s of results can be considered satisfactory (relative differences for thrust coefficient amount to 15%, while they are even lower for the torque coefficient), while the effects of Reynolds number are not significant when throttle is above 40%.
Кључне речи:
rotor blades / flow computation / k-ω SST / experiment / thrust measurementИзвор:
Proceedings / The 8th International Congress of Serbian Society of Mechanics, Kragujevac, Serbia, June 28-30, 2021, 2021, 527-534Издавач:
- 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 - Kovačević, Aleksandar AU - Ivanov, Toni AU - Jovanović, Miroslav PY - 2021 UR - https://machinery.mas.bg.ac.rs/handle/123456789/4215 AB - The main topic that is investigated in the present research is the turbulent flow around small-scale rotor blades in hovering flight condition. Small-scale rotorcraft imply somewhat specific operating conditions such as low Reynolds numbers, considerable viscous effects, degraded aerodynamic performances, flow separation, rotational flow, cyclic load cases, etc. It is therefore very important to perform as accurate as possible flow simulations that will enable obtaining practical aerodynamic data that can be used in subsequent structural and flight mechanics analyses. This paper provides the description of steps that are to be conducted when simulating hovering flow. Here, a quasi-steady approach, that combines RANS equations closed by k-ω SST turbulence model with the multiple reference frames, is adopted. Both quantitative and qualitative results are presented. Furthermore, the numerical model is validated against the obtained experimental data. The correspondence between the two sets of results can be considered satisfactory (relative differences for thrust coefficient amount to 15%, while they are even lower for the torque coefficient), while the effects of Reynolds number are not significant when throttle is above 40%. PB - Belgrade : Serbian Society of Mechanics C3 - Proceedings / The 8th International Congress of Serbian Society of Mechanics, Kragujevac, Serbia, June 28-30, 2021 T1 - Numerical investigation of Reynolds number effects on rotor aerodynamic performances in hover EP - 534 SP - 527 UR - https://hdl.handle.net/21.15107/rcub_machinery_4215 ER -
@conference{ author = "Svorcan, Jelena and Kovačević, Aleksandar and Ivanov, Toni and Jovanović, Miroslav", year = "2021", abstract = "The main topic that is investigated in the present research is the turbulent flow around small-scale rotor blades in hovering flight condition. Small-scale rotorcraft imply somewhat specific operating conditions such as low Reynolds numbers, considerable viscous effects, degraded aerodynamic performances, flow separation, rotational flow, cyclic load cases, etc. It is therefore very important to perform as accurate as possible flow simulations that will enable obtaining practical aerodynamic data that can be used in subsequent structural and flight mechanics analyses. This paper provides the description of steps that are to be conducted when simulating hovering flow. Here, a quasi-steady approach, that combines RANS equations closed by k-ω SST turbulence model with the multiple reference frames, is adopted. Both quantitative and qualitative results are presented. Furthermore, the numerical model is validated against the obtained experimental data. The correspondence between the two sets of results can be considered satisfactory (relative differences for thrust coefficient amount to 15%, while they are even lower for the torque coefficient), while the effects of Reynolds number are not significant when throttle is above 40%.", publisher = "Belgrade : Serbian Society of Mechanics", journal = "Proceedings / The 8th International Congress of Serbian Society of Mechanics, Kragujevac, Serbia, June 28-30, 2021", title = "Numerical investigation of Reynolds number effects on rotor aerodynamic performances in hover", pages = "534-527", url = "https://hdl.handle.net/21.15107/rcub_machinery_4215" }
Svorcan, J., Kovačević, A., Ivanov, T.,& Jovanović, M.. (2021). Numerical investigation of Reynolds number effects on rotor aerodynamic performances in hover. in Proceedings / The 8th International Congress of Serbian Society of Mechanics, Kragujevac, Serbia, June 28-30, 2021 Belgrade : Serbian Society of Mechanics., 527-534. https://hdl.handle.net/21.15107/rcub_machinery_4215
Svorcan J, Kovačević A, Ivanov T, Jovanović M. Numerical investigation of Reynolds number effects on rotor aerodynamic performances in hover. in Proceedings / The 8th International Congress of Serbian Society of Mechanics, Kragujevac, Serbia, June 28-30, 2021. 2021;:527-534. https://hdl.handle.net/21.15107/rcub_machinery_4215 .
Svorcan, Jelena, Kovačević, Aleksandar, Ivanov, Toni, Jovanović, Miroslav, "Numerical investigation of Reynolds number effects on rotor aerodynamic performances in hover" in Proceedings / The 8th International Congress of Serbian Society of Mechanics, Kragujevac, Serbia, June 28-30, 2021 (2021):527-534, https://hdl.handle.net/21.15107/rcub_machinery_4215 .