Inspection of the dynamic properties of laminar separation bubbles: free-stream turbulence intensity effects for different Reynolds numbers
Sign Up to like & getrecommendations! Published in 2017 at "Experiments in Fluids"
DOI: 10.1007/s00348-017-2353-7
Abstract: The effects of free-stream turbulence intensity (FSTI) on the transition process of a pressure-induced laminar separation bubble have been studied for different Reynolds numbers (Re) by means of time-resolved (TR) PIV. Measurements have been performed… read more here.
Keywords: reynolds numbers; stream turbulence; free stream; turbulence intensity ... See more keywords
Response of a flat plate laminar separation bubble to Reynolds number, free-stream turbulence and adverse pressure gradient variation
Sign Up to like & getrecommendations! Published in 2020 at "Experiments in Fluids"
DOI: 10.1007/s00348-020-02958-y
Abstract: Abstract An extensive data set describing separated flows with different Reynolds numbers (Re), free-stream turbulence intensities (Tu) and adverse pressure gradients (APG) is used for the statistical characterization of laminar separation bubbles (LSBs). Measurements were… read more here.
Keywords: adverse pressure; flat plate; stream turbulence; free stream ... See more keywords
Spanwise flow development within a laminar separation bubble under natural and forced transition
Sign Up to like & getrecommendations! Published in 2018 at "Experimental Thermal and Fluid Science"
DOI: 10.1016/j.expthermflusci.2018.02.032
Abstract: Abstract The variation of streamwise and spanwise characteristic wavelengths of a NACA 0018 laminar separation bubble under natural and periodic excitation conditions is investigated experimentally. Periodic forcing is applied with an AC-DBD plasma actuator, and… read more here.
Keywords: separation bubble; bubble natural; excitation; spanwise ... See more keywords
Response of a laminar separation bubble to impulsive forcing
Sign Up to like & getrecommendations! Published in 2017 at "Journal of Fluid Mechanics"
DOI: 10.1017/jfm.2017.217
Abstract: The spatial and temporal response characteristics of a laminar separation bubble to impulsive forcing are investigated by means of time-resolved particle image velocimetry and linear stability theory. A two-dimensional impulsive disturbance is introduced with an… read more here.
Keywords: bubble impulsive; impulsive forcing; separation bubble; separation ... See more keywords
Suction control of laminar separation bubble over an airfoil at low Reynolds number
Sign Up to like & getrecommendations! Published in 2019 at "Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering"
DOI: 10.1177/0954410017727025
Abstract: A laminar separation bubble appears generally on the NACA2415 airfoil at low Reynolds number. In this paper, suction control of the laminar separation bubble over the NACA2415 airfoil at low Reynolds number are simulated. The… read more here.
Keywords: suction; suction control; separation bubble; laminar separation ... See more keywords
Characterization of Vortex Dynamics in a Laminar Separation Bubble
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DOI: 10.2514/1.j055501
Abstract: The development of coherent structures within the laminar separation bubble that forms on a NACA 0018 airfoil at an angle of attack of 8 deg and a chord-based Reynolds number of 100,000 is investig... read more here.
Keywords: dynamics laminar; characterization vortex; vortex dynamics; separation bubble ... See more keywords
New Correlation for the Prediction of Bursting of a Laminar Separation Bubble
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DOI: 10.2514/1.j057658
Abstract: Laminar separation bubble bursting is a deleterious phenomenon resulting in a loss of lift and an increase of drag at relatively low Reynolds numbers. There are some criteria in vogue in the litera... read more here.
Keywords: laminar separation; new correlation; separation bubble; prediction bursting ... See more keywords
New Viewpoint on the Mechanism of Laminar Separation Flutter
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DOI: 10.2514/1.j062206
Abstract: At transitional Reynolds numbers, an elastically supported airfoil oscillating in pitch can undergo laminar separation flutter (LSF), which is characterized by self-sustained small-amplitude oscillations. To gain insight into the mechanism of LSF, we conduct wind… read more here.
Keywords: formula see; separation flutter; lsf; laminar separation ... See more keywords