Study About Boundary-Layer Suction at a Juncture for Sustained Laminar Flow

Zahn, Johannes; Rist, Ulrich

doi:10.1007/978-3-319-64519-3_32

Cited by 4 publications

(5 citation statements)

References 4 publications

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“…This observation is in agreement with findings from the first part of this study found in Methel et al (2019). Moreover, numerical studies, such as by Zahn and Rist (2018), observed that, for suction flow rates much greater than those used in the present study, wall suction through a slot located immediately upstream of a step could prevent transition, with respect to the case without suction. Wall suction therefore does offer the ability to reduce the effect of surface imperfections.…”

Section: Discussionsupporting

confidence: 93%

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Experimental investigation on the effect of forward-facing steps and gaps combined with wall suction on boundary layer transition

et al. 2021

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HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.

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Section: Discussionsupporting

confidence: 93%

“…For this reason, along with high costs and bulkiness, no commercial implementation ensued. In an effort to improve models, numerical studies, such as by Hahn andPfenninger (1973), Al-Maaitah et al (1989), or more recently Zahn and Rist (2018), were conducted to improve understanding of the interaction between surface defects and suction.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation on the effect of forward-facing steps and gaps combined with wall suction on boundary layer transition

et al. 2021

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“…This observation is in agreement with findings f rom t he fi rst pa rt of th is st udy fo und in Methel et al (2019). Moreover, numerical studies, such as by Zahn and Rist (2018), observed that, for suction flow r ates m uch g reater t han t hose u sed i n the present study, wall suction through a slot located immediately upstream of a step could prevent transition, with respect to the case without suction. Wall suction therefore does offer t he a bility t o r educe t he e ffect of su rface imperfections.…”

Section: Discussionsupporting

confidence: 92%

Experimental investigation on the effect of forward-facing steps and gaps combined with wall suction on boundary layer transition

Methel

Forte

Vermeersch

et al. 2022

Preprint

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“…This refs. [18,19]. For cases with suction (starboard), however, 375 transition was shifted towards a more downstream location.…”

Section: Reproducibility and Repeatability Of The Resultsmentioning

confidence: 97%

“…slits) downstream of a backward facing step at low Mach numbers (M < 0.1); numerical studies have been 45 conducted to examine suction through a gap upstream of a forward-facing step in refs. [17], [18] and [19]…”

Section: Introductionmentioning

confidence: 99%

Experimental analysis of suction on step-induced boundary-layer transition

Dimond

Costantini

Risius

et al. 2019

Experimental Thermal and Fluid Science

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The influence of suction on step-induced boundary-layer transition has been experimentally investigated in the Cryogenic Ludwieg-Tube Goettingen at large chord Reynolds numbers (up to 16 • 10 6), Mach numbers from 0.35 to 0.77 and various streamwise pressure gradients by means of temperature-sensitive paint. Surface imperfections, implemented as combination of gap and forward-facing step, caused transition to occur at a location more upstream than in the case of a smooth surface (i.e. without gap and step). For this combination of imperfections, it was demonstrated for the first time in experiments that suction, achieved passively by exploiting the pressure difference between upper and lower side of the model, induced a movement of transition to a more downstream location than without suction, and in most cases even more downstream than on the smooth configuration at the same test conditions. Thus, the effect of suction was to even overcompensate the adverse effect of the combination of gap and forward-facing step on boundary-layer transition for the investigated test conditions.

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Study About Boundary-Layer Suction at a Juncture for Sustained Laminar Flow

Cited by 4 publications

References 4 publications

Experimental investigation on the effect of forward-facing steps and gaps combined with wall suction on boundary layer transition

Experimental investigation on the effect of forward-facing steps and gaps combined with wall suction on boundary layer transition

Experimental investigation on the effect of forward-facing steps and gaps combined with wall suction on boundary layer transition

Experimental analysis of suction on step-induced boundary-layer transition

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