On time‐dependent behaviour of controlled turbulent flow with separation and reattachment

Neumann, Jens

doi:10.1002/pamm.200310312

Cited by 11 publications

(5 citation statements)

References 13 publications

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“…The effect of the obstacle on the flow dynamics behind the step has been studied in [5][6][7][8][9][10]. In an experimental study [11], flow control was conducted using three-dimensional rectangular tabs, arranged at the edge of the step.…”

Section: Introductionmentioning

confidence: 99%

Peculiar effects of permeable tabs on the heat transfer behind the backward-facing step

Terekhov,

Dyachenco,

Smulsky

et al. 2023

E3S Web Conf.

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The effect of square-shaped tabs on the turbulent flow dynamics and heat transfer behind the backward-facing step has been studied experimentally. The Reynolds number, calculated by the hydraulic diameter of the inlet section and the average velocity, calculated based on volumetric flow rate was Re = 42500. The 6x6 mm2 square-shaped tabs, installed at the edge of the backward-facing step, were of two types: solid and permeable. The permeable tabs had a square hole of 4x4 mm2 in their center. In the experiments, the spacing between tabs varied from 1.2 to 2.5 calibers. The paper presents the results showing the effect of tabs on pressure distribution, local heat transfer, averaged heat transfer, as well as gives estimates of thermal hydraulic efficiency.

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Section: Introductionmentioning

confidence: 99%

Peculiar effects of permeable tabs on the heat transfer behind the backward-facing step

Terekhov,

Dyachenco,

Smulsky

et al. 2023

E3S Web Conf.

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“…The effect of a two-dimensional obstacle on the flow dynamics and heat transfer behind the step is studied in [8][9][10][11][12][13]. A rib in front of the step forms its own separation area and, depending on the rib location relative to the step, the area behind the step either increases if there is no individual area, or decreases if an individual area has been formed.…”

Section: Introductionmentioning

confidence: 99%

Effect of a detached rib behind a backward-facing step on separated flow dynamics and heat transfer

Terekhov,

Dyachenko,

Smulsky

et al. 2023

E3S Web Conf.

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Here, we present the experimental results on the influence of a detached rib behind a backward-facing step on the flow dynamics and heat transfer. The height of a slot between the lower edge of the rib and the channel wall was varied in the range dh/H = 0.7–1.3, and the distance between the rib and the step was varied within t/H = 0.2–3.2. The rib height was constant and equal to 0.3H, where H is the step height. The fields of static pressures were measured behind the point of flow separation at the step edge. The study was performed in the range of Reynolds numbers 14,200-42,500. The two-dimensional fields of velocities and their fluctuations were measured using the PIV method. Heat transfer was studied in the regime of constant heat flux on the channel surface, where the step was located. Behaviors of the pressure and velocity profiles, as well as heat transfer with varying the detached rib location relative to the step are shown.

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“…Численные исследования [10,11] процесса интерференции отрывных потоков различных размеров подтвердили экспериментальные данные [9], показав возможность уменьшения протяженности области отрыва за счет установки мини-турбулизатора. При этом одной из основных трудностей использования пассивных методов управления является необходимость точного прогнозирования процесса взаимодействия отрывных потоков различного размера.…”

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Experimental Study of the Separated Flow Structure Behind a Backward-Facing Step and a Passive Disturbance

2016

PMTF

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С использованием метода трассерной визуализации проведено экспериментальное исследование течения в канале с обратным уступом и установленным перед ним ребром, генерирующим возмущения потока. Показано, что установка одиночного ребра приводит к деформации профилей продольных средних скоростей и турбулентных пульсаций. Выявлено влияние положения и высоты одиночного ребра на область рециркуляции за обратным уступом. Подтверждено, что при присоединении потока до уступа размер области рециркуляции за обратным уступом уменьшается.

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On time‐dependent behaviour of controlled turbulent flow with separation and reattachment

Cited by 11 publications

References 13 publications

Peculiar effects of permeable tabs on the heat transfer behind the backward-facing step

Peculiar effects of permeable tabs on the heat transfer behind the backward-facing step

Effect of a detached rib behind a backward-facing step on separated flow dynamics and heat transfer

Experimental Study of the Separated Flow Structure Behind a Backward-Facing Step and a Passive Disturbance

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