Instability of streaky structure in a Blasius boundary layer

Катасонов, М. М.; Park, S.-H.; Sung, Hyung-Jin; Козлов, В. В.

doi:10.1007/s00348-004-0917-9

Cited by 18 publications

(7 citation statements)

References 10 publications

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“…The disturbance length (200 ms) is equal to the length of pulse, which moves the membrane upward. This structure is corresponding to the longitudinal localized streaky structures, or so-called "puff" structures, which are in more detail investigated at [3][4][5][6][7][8][9][10][11]. Going downstream, the flow pulsations of this structure (u min and u max ) become weaker.…”

Section: Resultsmentioning

confidence: 99%

“…In papers [1][2][3][4] for supersonic and subsonic oncoming flow velocities, such investigations were carried out on the excitation of longitudinal structures and controlled wave packets in the boundary layer. This method makes it possible detailed investigations of characteristics for artificially introduced perturbations with saving of phase information, to trace the dynamics of the development of a concrete perturbation at all its stages.…”

Section: Introductionmentioning

confidence: 99%

“…This method makes it possible detailed investigations of characteristics for artificially introduced perturbations with saving of phase information, to trace the dynamics of the development of a concrete perturbation at all its stages. In addition to the widely used suction-injection technique [4,5], another method is also used where the boundary layer disturbances are generated by vibrations of a local surface area. Experimental investigation of the origin and development of disturbances, generated by vibration of three-dimensional surface in the Blasius boundary layer is shown in [6] and for the straight wing boundary layer in [7].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Experimental investigation of localized disturbances in the straight wing boundary layer, generated by finite surface vibrations

Козлов

Катасонов

Pavlenko

2017

AIP Conference Proceedings

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Abstract. Downstream development of artificial disturbances were investigated experimentally using hot-wire constant temperature anemometry. It is shown that vibrations with high-amplitude of a three-dimensional surface lead to formation of two types of perturbations in the straight wing boundary layer: streamwise oriented localized structures and wave packets. The amplitude of streamwise structure is decay downstream. The wave packets amplitude grows in adverse pressure gradient area. The flow separation is exponentially intensified of the wave packet amplitude.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Experimental investigation of localized disturbances in the straight wing boundary layer, generated by finite surface vibrations

Козлов

Катасонов

Pavlenko

2017

AIP Conference Proceedings

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“…Thus, e.g. in Katasonov et al 22 the emergence of wave packets, or forerunners, in the frontal regions of localized structures, and their evolution in subsonic boundary layer, was experimentally examined. Experiments showed that the forerunners were Tollmien-Schlichting wave packets.…”

Section: Introductionmentioning

confidence: 99%

Evolution of localized artificial disturbance in 2D and 3D supersonic boundary layers

Yatskikh

Yermolaev

Kosinov

et al. 2018

Proceedings of the Institution of Mechanical Engineers, Part G:

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The evolution of a controlled broadband wave packet in flat-plate and swept-wing supersonic boundary layers was experimentally investigated at Mach number M = 2. The wave packet was introduced into the boundary layer by a localized pulse electrical discharge. The structure and evolution downstream of the wave packet were studied by hot-wire measurements. It was found that the wave packet has a symmetric shape in a flat-plate boundary layer, whereas there is asymmetry in case of a swept-wing one. The spectral analysis of the development of different modes of the wave packet was provided.

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“…Thus, e.g. in [12] the emergence of wave packets, or forerunners, in the frontal regions of localized structures and their evolution in subsonic boundary layer was experimentally examined. The experiments showed that the forerunners were Tollmien-Schlichting wave packets.…”

Section: Introductionmentioning

confidence: 99%

Excitation of localized wave packet in swept-wing supersonic boundary layer

et al. 2017

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The evolution of the artificial wave packet in swept-wing supersonic boundary layer was experimentally studied at M=2. The localized disturbances were generated by a pulse glow discharge. Measurements were provided by a hot-wire anemometer. The spatial structure of the wave packet was studied. It was found that the wave packet has an asymmetric shape. In addition, the velocity of the propagation downstream of the wave packet was estimated.

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Instability of streaky structure in a Blasius boundary layer

Cited by 18 publications

References 10 publications

Experimental investigation of localized disturbances in the straight wing boundary layer, generated by finite surface vibrations

Experimental investigation of localized disturbances in the straight wing boundary layer, generated by finite surface vibrations

Evolution of localized artificial disturbance in 2D and 3D supersonic boundary layers

Excitation of localized wave packet in swept-wing supersonic boundary layer

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