A sliding mode controller for a model of flow separation in boundary layers
Sign Up to like & getrecommendations! Published in 2019 at "International Journal of Robust and Nonlinear Control"
DOI: 10.1002/rnc.4822
Abstract: In this paper, we propose a sliding mode controller for a MIMO model of flow separation in boundary layers. The model consists in a bilinear system with constant delays in both the state and the… read more here.
Keywords: mode controller; boundary layers; separation boundary; sliding mode ... See more keywords
Flow separation control over an airfoil using dual excitation of DBD plasma actuators
Sign Up to like & getrecommendations! Published in 2018 at "Aerospace Science and Technology"
DOI: 10.1016/j.ast.2018.06.019
Abstract: Abstract This paper investigates flow separation control over an airfoil using dual excitation of DBD plasma actuators as a novel approach. Large eddy simulation is adopted to capture vortical structures within the airfoil wake. Power… read more here.
Keywords: flow separation; separation control; case; excitation ... See more keywords
Numerical study of pore-scale flow and noise of an open cell metal foam
Sign Up to like & getrecommendations! Published in 2018 at "Aerospace Science and Technology"
DOI: 10.1016/j.ast.2018.09.002
Abstract: Abstract This paper studies numerically the three-dimensional pore-scale flow inside a single cell structure of an open cell metal foam and its aeroacoustic features. Since the Reynolds number based on the pore diameter is very… read more here.
Keywords: flow separation; metal foam; scale flow; cell ... See more keywords
Partially-averaged Navier–Stokes (PANS) simulations of flow separation over smooth curved surfaces
Sign Up to like & getrecommendations! Published in 2017 at "International Journal of Heat and Fluid Flow"
DOI: 10.1016/j.ijheatfluidflow.2017.05.005
Abstract: Abstract The objective of this study is to investigate flow separation in a channel with periodic hill-shaped constrictions using the Partially-averaged Navier–Stokes (PANS) methodology. Flow Reynolds numbers based on the bulk velocity above the crest… read more here.
Keywords: flow separation; partially averaged; pans simulations; averaged navier ... See more keywords
The force generation mechanism of lifting surfaces with flow separation
Sign Up to like & getrecommendations! Published in 2021 at "Ocean Engineering"
DOI: 10.1016/j.oceaneng.2021.109749
Abstract: Abstract Fins, wings, blades and sails can generate lift and drag in both attached and separated flow conditions. However, the common understanding of the lift generation mechanism holds only for attached flow conditions. In fact,… read more here.
Keywords: generation; generation mechanism; flow separation; force generation ... See more keywords
Flow separation control over a rounded ramp with spanwise alternating wall actuation
Sign Up to like & getrecommendations! Published in 2019 at "Physics of Fluids"
DOI: 10.1063/1.5055948
Abstract: An implicit large-eddy simulation is carried out to study turbulent boundary-layer separation from a backward-facing rounded ramp with active wall actuation control. This method, called spanwise alternating distributed strips control, is imposed onto the flat… read more here.
Keywords: flow separation; control; rounded ramp; separation ... See more keywords
Flow separation control on a highly loaded compressor cascade using endwall synthetic jets
Sign Up to like & getrecommendations! Published in 2018 at "Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering"
DOI: 10.1177/0954410017717546
Abstract: This paper presents flow separation control conducted on a highly loaded compressor stator cascade using endwall synthetic jets. Numerical methods are employed and mechanisms of endwall synthetic jets in improving the cascade performance are discussed… read more here.
Keywords: flow separation; synthetic jets; separation control; endwall synthetic ... See more keywords
Duffing–van der Pol nonlinear reduced-order model for explaining the phenomena and mechanism in pulsed jet flow separation control
Sign Up to like & getrecommendations! Published in 2022 at "Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering"
DOI: 10.1177/09544100211068911
Abstract: A two-equation nonlinear reduced-order model is established to describe the interaction between external periodic excitation from a pulsed jet and unsteady flow separation. This model, which is based on a 2D Navier–Stokes equation, the Stuart… read more here.
Keywords: flow separation; pulsed jet; control; model ... See more keywords
An unsteady two-dimensional vortex method for the flow separation over a flapping wing
Sign Up to like & getrecommendations! Published in 2022 at "Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering"
DOI: 10.1177/09544100221100057
Abstract: The flow separation over a very flexible or morphing aircraft, especially during flying or oscillation at a high angle of attack, is stronger than that for conventional aircraft. However, a low-order model for reliably predicting… read more here.
Keywords: artificial boundary; two dimensional; vortex method; method ... See more keywords
Base flow separation method in conditions of the karst catchment
Sign Up to like & getrecommendations! Published in 2023 at "Pollack Periodica"
DOI: 10.1556/606.2023.00538
Abstract: Geological conditions are an important parameter on hydrological modeling that strongly affects runoff generation processes. They are not usually taken into account in the parameters of hydrological models, especially karst catchments, where water transfers through… read more here.
Keywords: base flow; base; flow separation; conditions karst ... See more keywords
Flow Separation Control over a Thin Post-Stall Airfoil: Effects of Excitation Frequency
Sign Up to like & getrecommendations! Published in 2019 at "AIAA Journal"
DOI: 10.2514/1.j057796
Abstract: The results of experiments investigating excitation of flow instability over a VR-7 airfoil at a post-stall angle of attack of 19° are presented. The Reynolds number based on the chord was fixed at... read more here.
Keywords: flow separation; excitation; post stall; separation control ... See more keywords