Transonic 3d Non-Stationary Flow Visualization Using Pulse Transversal Discharge

Znamenskaya, I. A.; Kuli-Zade, T.A.; Куликов, В. Н.; Perminov, S. P.

doi:10.1615/jflowvisimageproc.2011002204

Cited by 6 publications

(3 citation statements)

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“…In studies on wind tunnels, these times are tens and hundreds of microseconds, in studies of fast gas-dynamic processes, including unsteady interactions of shock waves, in units of microseconds. When creating a nonequilibrium spatially uniform flow region, a pulsed volume discharge with preionization by ultraviolet radiation from plasma sheets is effective [44][45][46][47]. The use of such a discharge ensures the minimum time for the development of breakdown, the diffuse nature of the glow at the initial stages of the discharge development, and excludes the possibility of the inhomogeneities appearance in the discharge volume that can uncontrollably affect the gas-dynamic flow during image recording.…”

Section: Gas Discharge Flow Visualizationmentioning

confidence: 99%

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Methods for Panoramic Visualization and Digital Analysis of Thermophysical Flow Fields. A Review.

Znamenskaya¹

2021

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The paper presents a review of modern methods in the registration, processing, and analysis of dynamic processes in liquids, gases, plasmas, multiphase media, which are realized in researches and technology. The review author observes both the physical fundamentals of flow visualization and the basics of modern technologies for digital processing of recorded flow images. A brief analysis of the panoramic visualization methods progress history covers a period of one and a half centuries. In the works of the last decade, the focus is on the methods of computer processing, tools, technologies for analyzing and recognizing of panoramic thermophysical fields, which make it possible to obtain quantitative information about flows. The review contains an analysis of publications describing the main modern methods of visualization of flows: methods based on the phenomenon of refraction; electroluminescence; on digital tracing (particle image velocimetry), visualization of surface flows (PSP and TSP coatings, liquid crystals; oil coatings). Particular attention is paid to methods using crosscorrelation image processing algorithms. Those are: digital tracing (PIV), shadow background method (in English Background Oriented Schlieren -BOS), seedless shadow methods, thermographic PIV, velocity measurement in viscous coatings, micro, tomographic modifications of PIV, etc. The actual problem of digital data analyzing in a panoramic experiment is touched upon -the problem of big data. Examples of the machine learning use in the analysis of big data sets of shadow surveys are given. Some examples of numerical simulation data visualization (simulation of experimental flowfields) are considered.

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Section: Gas Discharge Flow Visualizationmentioning

confidence: 99%

“…Unlike optical methods, which require an object probing, this method allows visualizing the flow through one window of the test chamber. On the other hand, several images can be simultaneously obtained through both windows of the test chamber, while the total viewing angle can reach 200 -250 [44].…”

Section: Gas Discharge Flow Visualizationmentioning

confidence: 99%

Methods for Panoramic Visualization and Digital Analysis of Thermophysical Flow Fields. A Review.

Znamenskaya¹

2021

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“…Визуализация течений осуществлялась преимущественно теневыми, интерферометрическими методами [12]. Метод визуализации импульсным объемным разрядом позволяет зарегистрировать зоны пониженной плотности на основе интегральной регистрации свечения разряда в потоке [13]. При этом зоны повышенного свечения являются источниками возмущений и ударных волн, влияющих на поток после окончания тока разряда.…”

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Наносекундная Ионизация Области Обтекания Прямоугольного Уступа Высокоскоростным Потоком

Знаменская¹,

Татаренкова²,

Кули-заде³

2020

Письма В Журнал Технической Физики

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The phenomenon of pulsed volume discharge plasma and current redistribution based on self-localization in an unsteady flow in a shock tube with 48 x 24 mm cross section is described. It is shown that in the gas-dynamic channel with a parallelepiped-shaped step in the flow behind theshock wave with Mach numbers of 2.8 - 3.5, short-lived plasma channels are formed in the separation zones near the step within 2800 μs.

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Visualization of supersonic flows with bow shock using transversal discharges

Ieshkin

Данилов

Chernysh

et al. 2019

J Vis

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Transonic 3d Non-Stationary Flow Visualization Using Pulse Transversal Discharge

Cited by 6 publications

References 0 publications

Methods for Panoramic Visualization and Digital Analysis of Thermophysical Flow Fields. A Review.

Methods for Panoramic Visualization and Digital Analysis of Thermophysical Flow Fields. A Review.

Наносекундная Ионизация Области Обтекания Прямоугольного Уступа Высокоскоростным Потоком

Visualization of supersonic flows with bow shock using transversal discharges

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