High speed imaging of a supersonic waterjet flow

Znamenskaya, I. A.; Shirshov, Y.N.; Koroteeva, E. Yu.; Novinskaya, A.; Sysoev, N. N.

doi:10.1080/17686733.2016.1243749

Cited by 3 publications

(1 citation statement)

References 7 publications

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“…The frame rate is less than 1000 frames / s. Figure 1 presents subsequent thermographic images of turbulent boundary water flow at 115 Hzsubmerged impact jet (false colors). Being registered through an IRtransparent window, thermal imager visualizes IR radiation from a thin near-surface layer [3,4]. The time dependences of the measured thermal signals at each point of animation are extracted using FLIR software (Figure 2).…”

Section: Thermographic Animationmentioning

confidence: 99%

Experimental Digital Animation in Fluid Dynamics

Znamenskaya

Sysoev

Doroshchenko

2021

Proceedings of the 31th International Conference on Computer Graphics and Vision. Volume 2

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Digital imaging became one of the main tools for studying unsteady flows. Modern high-speed cameras support video recording at high frame rates which makes it possible to study extended high-speed processes. We demonstrate here different animations: water temperature field evolution with a frame rate of 115 Hz; high-speed shadowgraph visualisation of different flows - water jet formation process (100 000 frames / s), shadowgraph animations of the shock waves created by the pulsed discharges (124 000 frames / s). Also, as an example of plasma flow visualization technique, we offer 9 sequential images of the shock wave - pulse gas discharge visualization obtained by the high-speed CCD camera with the 100 ns delay between frames. We developed in-house software based on the machine vision and learning techniques for automatic flow animations processing. The examples of the automatic oblique shock detection using Canny edge detection and Hough transform and thermal plume detection based on the pre-trained convolutional neural network are provided and discussed.

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Section: Thermographic Animationmentioning

confidence: 99%

Experimental Digital Animation in Fluid Dynamics

Znamenskaya

Sysoev

Doroshchenko

2021

Proceedings of the 31th International Conference on Computer Graphics and Vision. Volume 2

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Multistage hybrid model for performance prediction of centrifugal pump

Deng

Xia

Sun

et al. 2022

Advances in Engineering Software

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Mathematical modeling of a waterjet jet for structural material cutting

Shpilev

Решетников

Borodulina

et al. 2020

IOP Conf. Ser.: Mater. Sci. Eng.

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When modeling a jet during hydroabrasive processing of structural materials, we will represent it as a heterogeneous environment. And accordingly, the hydroabrasive flow will be considered as a heterogeneous flow. The equations describing the formation of a heterogeneous flow are based on the equation of conservation of momentum of the total movement and allow for the interaction of the background flow and particles of the abrasive. A mathematical model of a heterogeneous flow, reveals the mechanism of formation of a waterjet jet. Based on the mathematical model, the hydrodynamic forces and surface stresses acting between the abrasive and the liquid can be taken into account. It also takes into account speed, concentration, mass, density of the fluid and abrasive. Knowing these parameters, it is possible to use the mathematical model of a heterogeneous flow to find the optimal conditions for the formation of a waterjet flow and the processing of structural materials.

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High speed imaging of a supersonic waterjet flow

Cited by 3 publications

References 7 publications

Experimental Digital Animation in Fluid Dynamics

Experimental Digital Animation in Fluid Dynamics

Multistage hybrid model for performance prediction of centrifugal pump

Mathematical modeling of a waterjet jet for structural material cutting

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