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Erschienen in: Experiments in Fluids 4/2011

01.10.2011 | Research Article

Experimental investigation of vortex rings impinging on inclined surfaces

verfasst von: Lauren D. Couch, Paul S. Krueger

Erschienen in: Experiments in Fluids | Ausgabe 4/2011

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Abstract

Vortex–ring interactions with oblique boundaries were studied experimentally to determine the effects of plate angle on the generation of secondary vorticity, the evolution of the primary vorticity and secondary vorticity as they interact near the boundary, and the associated energy dissipation. Vortex rings were generated using a mechanical piston-cylinder vortex ring generator at jet Reynolds numbers 2,000–4,000 and stroke length to piston diameter ratios (L/D) in the range 0.75–2.0. The plate angle relative to the initial axis of the vortex ring ranged from 3 to 60°. Flow analysis was performed using planar laser-induced fluorescence (PLIF), digital particle image velocimetry (DPIV), and defocusing digital particle tracking velocimetry (DDPTV). Results showed the generation of secondary vorticity at the plate and its subsequent ejection into the fluid. The trajectories of the centers of circulation showed a maximum ejection angle of the secondary vorticity occurring for an angle of incidence of 10°. At lower incidence angles (<20°), the lower portion of the ring, which interacted with the plate first, played an important role in generation of the secondary vorticity and is a key reason for the maximum ejection angle for the secondary vorticity occurring at an incidence angle of 10°. Higher Reynolds number vortex rings resulted in more rapid destabilization of the flow. The three-dimensional DDPTV results showed an arc of secondary vorticity and secondary flow along the sides of the primary vortex ring as it collided with the boundary. Computation of the moments and products of kinetic energy and vorticity magnitude about the centroid of each vortex ring showed increasing asymmetry in the flow as the vortex interaction with the boundary evolved and more rapid dissipation of kinetic energy for higher incidence angles.

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Literatur
Zurück zum Zitat Geiser J, Kiger K (2010) A simplified analog for a rotocraft-in-ground-effect flow using a forced impinging jet. Bull Am Phys Soc 55:51 Geiser J, Kiger K (2010) A simplified analog for a rotocraft-in-ground-effect flow using a forced impinging jet. Bull Am Phys Soc 55:51
Zurück zum Zitat Kobus H, Leister P, Westrich B (1979) Flow field and scouring effects of steady and pulsating jets impinging on a movable bed. J Hyd Res 17:175–192CrossRef Kobus H, Leister P, Westrich B (1979) Flow field and scouring effects of steady and pulsating jets impinging on a movable bed. J Hyd Res 17:175–192CrossRef
Zurück zum Zitat Lim TT (1989) An experimental study of a vortex ring interacting with an inclined wall. Exp Fluids 7:453–463CrossRef Lim TT (1989) An experimental study of a vortex ring interacting with an inclined wall. Exp Fluids 7:453–463CrossRef
Zurück zum Zitat Lim TT, Nickels TB (1995) Vortex rings. In: Green SI (ed) Fluid vortices. Kluwer Academics Publishers, Dordrecht, pp 95–153CrossRef Lim TT, Nickels TB (1995) Vortex rings. In: Green SI (ed) Fluid vortices. Kluwer Academics Publishers, Dordrecht, pp 95–153CrossRef
Zurück zum Zitat McCormick DC (2000) Boundary layer separation control with directed synthetic jets. AIAA paper 2000-0519 McCormick DC (2000) Boundary layer separation control with directed synthetic jets. AIAA paper 2000-0519
Zurück zum Zitat Mohseni K, Ran H, Colonus T (2001) Numerical experiments on vortex ring formation. J Fluid Mech 430:267–282MATHCrossRef Mohseni K, Ran H, Colonus T (2001) Numerical experiments on vortex ring formation. J Fluid Mech 430:267–282MATHCrossRef
Zurück zum Zitat Naaktgeboren C (2007) Interaction of pressure and omentum driven flows with thin porous media: experiments and modeling. PhD dissertation, Southern Methodist University, Dallas, TX Naaktgeboren C (2007) Interaction of pressure and omentum driven flows with thin porous media: experiments and modeling. PhD dissertation, Southern Methodist University, Dallas, TX
Zurück zum Zitat Pedochi F, Martin JE, Garcia MH (2008) Inexpensive fluorescent particles for large-scale experiments using particle image velocimetry. Exp Fluids 45:183–186CrossRef Pedochi F, Martin JE, Garcia MH (2008) Inexpensive fluorescent particles for large-scale experiments using particle image velocimetry. Exp Fluids 45:183–186CrossRef
Zurück zum Zitat Pereira F, Gharib M, Dabiri D, Modarress D (2000) Defocusing digital particle image velocimetry: a 3-component 3-dimensional DPIV measurement technique. Application to bubbly flows. Experiments in Fluids [Suppl.] S78–S84 Pereira F, Gharib M, Dabiri D, Modarress D (2000) Defocusing digital particle image velocimetry: a 3-component 3-dimensional DPIV measurement technique. Application to bubbly flows. Experiments in Fluids [Suppl.] S78–S84
Zurück zum Zitat Pereira F, Stuer H, Graff EC, Gharib M (2006) Two-frame 3D particle tracking. Meas Sci Technol 17:1680–1692CrossRef Pereira F, Stuer H, Graff EC, Gharib M (2006) Two-frame 3D particle tracking. Meas Sci Technol 17:1680–1692CrossRef
Zurück zum Zitat Raffel M, Willert C, Kompenhans J (1998) Particle image velocimetry: a practical guide. Springer, Berlin Raffel M, Willert C, Kompenhans J (1998) Particle image velocimetry: a practical guide. Springer, Berlin
Zurück zum Zitat Shariff HS, Zumbrunnen DA (1994) Effect of flow pulsation on the cooling of effectiveness of an impinging jet. J Heat Trans 116:886–895CrossRef Shariff HS, Zumbrunnen DA (1994) Effect of flow pulsation on the cooling of effectiveness of an impinging jet. J Heat Trans 116:886–895CrossRef
Zurück zum Zitat Verzicco R, Orlandi P (1994) Normal and oblique collisions of a vortex ring with a wall. Meccanica 29:383–391MATHCrossRef Verzicco R, Orlandi P (1994) Normal and oblique collisions of a vortex ring with a wall. Meccanica 29:383–391MATHCrossRef
Zurück zum Zitat Walker JDA, Smith CR, Cerra AW, Doligalski TL (1987) The impact of a vortex ring on a wall. J Fluid Mech 181:99–140CrossRef Walker JDA, Smith CR, Cerra AW, Doligalski TL (1987) The impact of a vortex ring on a wall. J Fluid Mech 181:99–140CrossRef
Zurück zum Zitat Westerweel J, Dabiri J, Gharib M (1997) The effect of a discrete window offset on the accuracy of cross-correlation analysis of digital PIV recordings. Exp Fluids 23:20–28CrossRef Westerweel J, Dabiri J, Gharib M (1997) The effect of a discrete window offset on the accuracy of cross-correlation analysis of digital PIV recordings. Exp Fluids 23:20–28CrossRef
Zurück zum Zitat Willert CE, Gharib M (1991) Digital particle image velocimetry. Exp Fluids 10:181–193CrossRef Willert CE, Gharib M (1991) Digital particle image velocimetry. Exp Fluids 10:181–193CrossRef
Zurück zum Zitat Yamada H, Kohsaka T, Yamabe H, Matsui T (1982) Flowfield produced by a vortex ring near a plane wall. J Phys Soc Jpn 51(5):1663–1670CrossRef Yamada H, Kohsaka T, Yamabe H, Matsui T (1982) Flowfield produced by a vortex ring near a plane wall. J Phys Soc Jpn 51(5):1663–1670CrossRef
Zurück zum Zitat Yan X, Saniei N (1997) Heat transfer from an obliquely impinging circular air jet to a flat plate. Int J Heat Fluid Flow 18:591–599CrossRef Yan X, Saniei N (1997) Heat transfer from an obliquely impinging circular air jet to a flat plate. Int J Heat Fluid Flow 18:591–599CrossRef
Metadaten
Titel
Experimental investigation of vortex rings impinging on inclined surfaces
verfasst von
Lauren D. Couch
Paul S. Krueger
Publikationsdatum
01.10.2011
Verlag
Springer-Verlag
Erschienen in
Experiments in Fluids / Ausgabe 4/2011
Print ISSN: 0723-4864
Elektronische ISSN: 1432-1114
DOI
https://doi.org/10.1007/s00348-011-1135-x

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