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Communication Dans Un Congrès Année : 2021

Experimental study on the effects of two-dimensional surface defects on the transition of a sucked boundary-layer

Résumé

As laminar flow control by boundary layer suction is becoming an increasingly viable commercial application, airframe integration issues still need to be addressed. The current implementation of wall suction on an aerodynamic surface involves the juxtaposition of a perforated suction panel next to a solid-wall panel: at the junction, destabilizing surface imperfections are expected to occur. The competition between wall suction and surface defects therefore needs to be investigated to understand if current manufacturing tolerances are acceptable to justify the implementation of wall suction. The focus of this experimental study is to investigate the effect of surface defects on the laminar-turbulent transition of a sucked boundary layer. The objective is to provide critical height criteria below which suction could be effective. A flat plate with a suction region was placed in a two-dimensional Blasius flow, and surface defects were introduced in the form of wires and forward-facing steps (FFS). For both types of defect, the (critical) dimensions for which transition occurred at the defect location were unchanged, regardless of the use of wall suction. However, suction remained effective in delaying transition in the presence of subcritical defects, a favorable argument for this technology's implementation as tolerances on aerodynamic surfaces improve.
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Dates et versions

hal-03206545 , version 1 (23-04-2021)

Identifiants

  • HAL Id : hal-03206545 , version 1

Citer

Jeanne Methel, Maxime Forte, Olivier Vermeersch, Grégoire Casalis. Experimental study on the effects of two-dimensional surface defects on the transition of a sucked boundary-layer. Aero 2020+1 - 55th 3AF International Conference on Applied Aerodynamics, Association 3AF - Association Aéronautique et Astronautique de France, Apr 2021, Online, France. pp.FP82-AERO2020-Forte. ⟨hal-03206545⟩

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