Measurements of the Periodic Velocity Oscillations Near the Wall in Unsteady Turbulent Channel Flow

Binder, G.; Kueny, Jean-Louis

doi:10.1007/978-3-642-81732-8_9

Cited by 21 publications

(18 citation statements)

References 3 publications

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“…These phase lead values are higher than the value of about 10° observed by Tu and Ramaprian* 15 ' in pipe flow. They, however, seem to support the boundary-layer data of Jayaraman, Parikh and Reynolds' 6 ' and developing channelflow studies of Binder and Quiney* 12 ' which suggest that phase lead of < T W > may eventually reach the laminar limit of 45° at very high frequencies.…”

Section: Oscillatory Motionsupporting

confidence: 53%

Experimental study of a periodic turbulent boundary layer in zero mean pressure gradient

Menéndez¹,

Ramaprian²

1989

Aeronaut. j.

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A turbulent boundary layer, subjected to a freestream velocity which changes sinusoidally with time around a spatially uniform mean value has been studied experimentally. The experiments were conducted in a specially designed unsteady-flow water tunnel. A two-component laser Doppler anemometer was used to measure the instantaneous velocities, and hence the turbulent stresses, in the periodic boundary layer. A surface-mounted heat-flux gauge was used to measure the unsteady wall shear stress. The experiments were conducted at relatively high amplitudes of oscillation (≈ 40% of the mean) and over a wide range of reduced frequencies (1.7-28). While the present data on the oscillatory flow properties generally confirm previously known trends the information on the turbulent shear stress and skin friction obtained in the present studies is more complete than previously available. The experimental data, all of which has been archived on magnetic tape, form a comprehensive base for the development and verification of predictive models for unsteady turbulent boundary layers.

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Section: Oscillatory Motionsupporting

confidence: 53%

Experimental study of a periodic turbulent boundary layer in zero mean pressure gradient

Menéndez¹,

Ramaprian²

1989

Aeronaut. j.

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“…The first one is analogous to that introduced by Ramaprian and Tu (3) based on eddy viscosity arguments. The second parameter is simply Vi(l s + ) 2 of Binder and Kueny (4) .…”

Section: Discussionmentioning

confidence: 99%

“…Note that U\, V\ and TI are all, in general, complex quantities. Introducing equations (5)- (8) into equations (l)- (4), and subtracting the equations corresponding to the time-mean flow, the equations and boundary conditions for the oscillatory flow are obtained as follows (see Telionis 2 ): Before undertaking the analysis of equations (9) and (10), the asymptotic behaviour of the time-mean flow in the boundary layer for large Reynolds number is briefly discussed in the next section.…”

Section: Theoretical Analysis Equationsmentioning

confidence: 99%

An asymptotic theory for the periodic turbulent boundary layer in zero mean pressure gradient

Menéndez¹,

Ramaprian

1989

Aeronaut. j.

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An asymptotic theory valid for large Reynolds number is developed for describing the oscillatory properties of a turbulent boundary layer in a free stream whose velocity varies harmonically with time around a non-zero mean value. The theory identifies two frequency parameters in terms of which four different regimes of oscillation frequency are defined. Similarity laws are identified for each of these frequency regimes and for the different layers of the periodic boundary layer. The theory seems to bring together the available data on unsteady wall bounded flows into a general framework.

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“…Souvent, pour des raisons technologiques, la fréquence de perturbation est unique, ou fixée arbitrairement dans le domaine « basses fréquences » afin d'obtenir des amplitudes de perturbation suffisantes. Les écoulements turbulents établis en canal bidimensionnel ou en conduite cylindrique ont été abordés de façons très disparates : écoulements pulsés [13,14,15,17,27]; parois ondulantes [18], ruban vibrant près de la paroi [12] et ont conduit à des résultats parfois contradictoires.…”

Section: A Propos Des éCoulements Perturbés Périodi-unclassified

“…Nous avons également noté sur la figure 1 le domaine d'études des travaux de [26]). ID Acharya et Reynolds [13], C a Binder et Kueny [14], A Cousteix et autres [19,20], Parikh et autres [23], ~ Ramaprian et Tu [15], ---Tartarin.…”

Section: A Propos Des éCoulements Perturbés Périodi-unclassified

Etude expérimentale de la zone pariétale d'un écoulement turbulent instationnaire en conduite bidimensionnelle

Tartarin¹

1983

Rev. Phys. Appl. (Paris)

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2014 L'étude expérimentale de la zone pariétale d'un écoulement bidimensionnel turbulent dont le débit est perturbé périodiquement a été menée en examinant plus particulièrement l'influence de la fréquence de perturbation lorsque celle-ci est de l'ordre de grandeur de la fréquence caractéristique d'apparition des bouffées turbulentes. Des variations notables dans l'évolution des profils des champs périodiques de vitesse et de turbulence très près de la paroi (y+ 25) nous ont conduit à proposer une hypothèse concernant la phénoménologie de la turbulence dans cette zone.

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Measurements of the Periodic Velocity Oscillations Near the Wall in Unsteady Turbulent Channel Flow

Cited by 21 publications

References 3 publications

Experimental study of a periodic turbulent boundary layer in zero mean pressure gradient

Experimental study of a periodic turbulent boundary layer in zero mean pressure gradient

An asymptotic theory for the periodic turbulent boundary layer in zero mean pressure gradient

Etude expérimentale de la zone pariétale d'un écoulement turbulent instationnaire en conduite bidimensionnelle

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