Detailed Characterisation, using PIV, of the Flow around an Airfoil in High-Lift Configuration

Arnott, A.; Schneider, G.; Neitzke, Klaus-Peter; Agocs, Janos; Schröder, Andreas; Sammler, B.; Kompenhans, Jürgen

doi:10.1007/978-3-642-18795-7_3

Cited by 11 publications

(13 citation statements)

References 6 publications

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“…2 and calc. 3 agree rather well with the PIV data reported in the Europiv2 experimental campaign (Arnott et al 2003).…”

Section: Reynolds-averaged Data Over the Slatsupporting

confidence: 86%

“…These authors observe high levels in the shear layer also equal to k uv /U 2 0 ≈ 0.02. Other PIV results for the RA16SC1 aerofoil (Arnott et al 2003;Deck 2005b) yield k uv /U 2 0 ≈ 0.0145. The peak of TKE is produced by the shear layer reattachment and a value of ( √ k uv /U 0 ) max ≈ 0.048 is observed.…”

Section: Reynolds-averaged Data Over the Slatmentioning

confidence: 94%

“…Here, again, the flap region has been poorly investigated. The most complete dataset as regards the velocity field for a slat/wing/flap configuration is to the best of the authors' knowledge the one acquired by Arnott et al (2003) in the frame of the EUROPIV2 program. Unfortunately no unsteady data is available on this configuration.…”

Section: Introductionmentioning

confidence: 99%

“…Table 1 summarizes the salient characteristics of most experimental works published in the last few years on two-dimensional high-lift configurations. Advanced experimental techniques such as particle image velocimetry (PIV) have allowed the investigation of the complex flow field inside the slat cove (Takeda et al 2002;Arnott et al 2003;Jenkins et al 2004;Kaepernick, Koop & Ehrenfried 2007;Henning et al 2008). Aeroacoustic farfield measurements were performed with microphones but only a few models were equipped with unsteady pressure taps or Kulites.…”

Section: Introductionmentioning

confidence: 99%

“…3 (− − −); (b,d) results for the RA16SC1 profile at similar relative locations, i.e. upstream from (a,b) and downstream (c,d) of the main wing trailing edge (adapted fromArnott et al (2003) andDeck (2005b), see also tables 1 and 2.…”

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confidence: 97%

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Numerical investigation of the flow dynamics past a three-element aerofoil

Deck

Laraufie

2013

J. Fluid Mech.

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A numerical investigation of the flow dynamics around a two-dimensional high-lift configuration was carried out by means of a zonal detached eddy simulation (ZDES) technique for flow conditions corresponding to aircraft approach. Both slat and flap regions have been scrutinized and compared with experimental data available in the literature. It is shown that slat and flap coves behave like shallow cavities. The distance between the upstream cusp and the downstream edge is the relevant length scale for each cove taken separately. Consistently with previous findings, this study indicates that the maximum of the broadband spectrum of slat (respectively flap) pressure fluctuations occurs for Strouhal numbers 0.5 St 4 when based on slat chord (respectively on flap chord) and free-stream velocity. It is shown that mode (n) of the slat cove and mode (n + 1) of the flap cove are very close making a coherent phase relationship possible. A large-scale coupled self-sustained oscillations mechanism between slat and flap cavities, evidenced by spectral analysis, occurs at a Strouhal number St = 3-6 based on the main wing chord and free-stream velocity. This yields to an acoustic feedback mechanism characterized by a normalized frequency depending on the free stream Mach number like St = (1 − M 2 0 )/2M 0 . The present result appears to line up with the findings by Hein et al. (J. Fluid Mech., vol. 582, 2007, pp. 179-202) who showed that two types of resonance could exist: surface waves ones, scaling with the total aerofoil length and longitudinal cavity-type resonances, scaling with the slat cove length.

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“…2 and calc. 3 agree rather well with the PIV data reported in the Europiv2 experimental campaign (Arnott et al 2003).…”

Section: Reynolds-averaged Data Over the Slatsupporting

confidence: 86%

Section: Reynolds-averaged Data Over the Slatmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%