Numerical investigations of dynamic stall characteristics with laminar-to-turbulence transition
Sign Up to like & getrecommendations! Published in 2021 at "Journal of Mechanical Science and Technology"
DOI: 10.1007/s12206-021-0718-6
Abstract: The influence of laminar-to-turbulence transition of the laminar separation bubble (LSB) on the dynamic stall process of a pitching foil was investigated using transition SST k-ω turbulence model. As the LSB moves to the leading… read more here.
Keywords: laminar turbulence; transition; turbulence; turbulence transition ... See more keywords
Surrogate-based aerodynamic shape optimization for delaying airfoil dynamic stall using Kriging regression and infill criteria
Sign Up to like & getrecommendations! Published in 2021 at "Aerospace Science and Technology"
DOI: 10.1016/j.ast.2021.106555
Abstract: Abstract The dynamic stall phenomenon is characterized by the formation of a leading-edge vortex, which is responsible for adverse aerodynamic forces and moments adversely impacting the structural strength and life of a system. Aerodynamic shape… read more here.
Keywords: optimization; dynamic stall; model; stall ... See more keywords
Study on dynamics of vortices in dynamic stall of a pitching airfoil using Lagrangian coherent structures
Sign Up to like & getrecommendations! Published in 2021 at "Aerospace Science and Technology"
DOI: 10.1016/j.ast.2021.106706
Abstract: Abstract The evolution of vortex structure and mass transport process during dynamic stall of the two-dimensional pitching NACA0012 airfoil are studied in detail, using Lagrangian coherent structures (LCSs), and the nature of dynamic stall is… read more here.
Keywords: dynamic stall; process; airfoil; vortex ... See more keywords
On limit cycle oscillations of typical aeroelastic section with different preset angles of incidence at low airspeeds
Sign Up to like & getrecommendations! Published in 2017 at "Journal of Fluids and Structures"
DOI: 10.1016/j.jfluidstructs.2017.07.008
Abstract: Abstract Helicopter blades and wind turbines are examples of aeroelastic systems that can reach high angles of attack and can vibrate due to the effects of the dynamic stall, thereby leading to fatigue problems or… read more here.
Keywords: preset angles; typical aeroelastic; preset; dynamic stall ... See more keywords
Aeroelastic responses of airfoil under dynamic stall forced to oscillate by cyclic pitch input
Sign Up to like & getrecommendations! Published in 2020 at "Journal of Sound and Vibration"
DOI: 10.1016/j.jsv.2020.115366
Abstract: Abstract The helicopter blades are involved in a nonlinear aeroelastic system in which unsteady dynamic stall flow and flexible structure are coupled. This problem can be reduced to a 2D aeroelastic problem in which airfoil… read more here.
Keywords: aeroelastic responses; system; frequency; dynamic stall ... See more keywords
Analysis of dynamic stall control on a pitching airfoil using dynamic mode decomposition
Sign Up to like & getrecommendations! Published in 2023 at "Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy"
DOI: 10.1177/09576509231177103
Abstract: Dynamic mode decomposition (DMD) technology is used to analyze the control of dynamic stall on a pitching S809 airfoil using an off-surface rod. The unsteady flows around the original and the controlled airfoil are simulated… read more here.
Keywords: dynamic mode; airfoil using; airfoil; mode decomposition ... See more keywords
Dynamic Stall Prediction of a Pitching Airfoil using an Adjusted Two-Equation URANS Turbulence Model
Sign Up to like & getrecommendations! Published in 2017 at "Journal of Applied Fluid Mechanics"
DOI: 10.18869/acadpub.jafm.73.238.26391
Abstract: The necessity in the analysis of dynamic stall becomes increasingly important due to its impact on many streamlined structures such as helicopter and wind turbine rotor blades. The present paper provides Computational Fluid Dynamics (CFD)… read more here.
Keywords: turbulence model; urans turbulence; dynamic stall; two equation ... See more keywords
Dynamic Stall Under Combined Pitching and Surging
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DOI: 10.2514/1.j059153
Abstract: Dynamic stall often occurs under conditions of simultaneous unsteady pitching and surging (e.g., rotorcraft and wind turbines), but many models employ a dimensionless time base that implicitly assu... read more here.
Keywords: combined pitching; dynamic stall; stall combined; pitching surging ... See more keywords
Dynamic Stall over a Pitching Natural-Laminar-Flow Airfoil
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DOI: 10.2514/1.j060605
Abstract: High-fidelity large-eddy simulations are performed to study the unsteady boundary layer sensitivity of a natural-laminar-flow airfoil (NLF-0414) undergoing dynamic stall in comparison to two tradit... read more here.
Keywords: natural laminar; laminar flow; dynamic stall; flow airfoil ... See more keywords
Passive control of dynamic stall using a flow-driven micro-cavity actuator
Sign Up to like & getrecommendations! Published in 2022 at "Theoretical and Computational Fluid Dynamics"
DOI: 10.2514/6.2022-0708
Abstract: Abstract A novel passive flow control strategy for the mitigation of transient separation and dynamic stall is demonstrated by means of high-fidelity large-eddy simulations. The control technique is based on a properly-sized micro-cavity cut into… read more here.
Keywords: cavity; passive control; micro cavity; dynamic stall ... See more keywords
Comparative Study of Dynamic Stall under Pitch Oscillation and Oscillating Freestream on Wind Turbine Airfoil and Blade
Sign Up to like & getrecommendations! Published in 2018 at "Applied Sciences"
DOI: 10.3390/app8081242
Abstract: This study aims to assess the dynamic stall of the wind turbine blade undergoing pitch oscillation (PO) and oscillating freestream (OF), respectively. Firstly, a thin-airfoil theoretical analysis was performed to differentiate between these two dynamic… read more here.
Keywords: dynamic stall; pitch oscillation; oscillation oscillating; oscillating freestream ... See more keywords