Numerical and experimental study of shock waves emanating from an open-ended rectangular tube

Koroteeva, E. Yu.; Znamenskaya, I. A.; Glazyrin, F. N.; Sysoev, N. N.

doi:10.1007/s00193-016-0650-3

Cited by 8 publications

(6 citation statements)

References 21 publications

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“…In [127], the PIV visualization and study of the flow developing when a shock wave exits the shock tube channel into the atmosphere was carried out (Fig. 20).…”

Section: Pivmentioning

confidence: 99%

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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“…In [127], the PIV visualization and study of the flow developing when a shock wave exits the shock tube channel into the atmosphere was carried out (Fig. 20).…”

Section: Pivmentioning

confidence: 99%

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

Znamenskaya¹

2021

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“…In the last two decades, shock tubes have become a standard laboratory tool to study, the effect of shock waves on animal models, including rodents, pigs, and ferrets [9,10]. In a broad survey of recent literature (time span: 2010-2019, S1 Table), trends can be observed in 71 experimental studies using shock tubes [11]. The survey, summarized in Fig 1, shows that in the majority of the work surveyed, the purpose of the work was to study injury pathologies in animal models (76%).…”

Section: Introductionmentioning

confidence: 99%

“…In more than half of the tests surveyed, the specimens (animal models, human surrogates, or animal surrogates) were tested near the exit or outside of the shock tubes. However, it is well-established that an unconfined shock front will undergo diffraction upon exit from the shock tube [11]. Free expansion of the unconstrained shock front at the exit induces a flow field which is very different from that of the inside; the flow field is affected by blast winds, air entrapment, vorticity, and rarefaction waves [12,13].…”

Section: Introductionmentioning

confidence: 99%

“…Increasingly, these optical techniques are coupled with numerical simulations to better describe the observable flow phenomena, enabling additional quantifiable analysis of the flow field [18]. However, despite the wealth of work performed in this field, a majority of the work conducted is conducted in shock tubes which are much smaller [11,14,19,20] or much larger [21] than those conventionally used in biomedical applications. Additionally, much of the work is conducted at Mach numbers which would induce a fatal injury in animal models, precluding their usefulness for the study of mild traumatic brain injury [22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

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The evolution of secondary flow phenomena and their effect on primary shock conditions in shock tubes: Experimentation and numerical model

et al. 2020

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Compressed gas-driven shock tubes are widely used for laboratory simulation of primary blasts by accurately replicating pressure profiles measured in live-fire explosions. These investigations require sound characterization of the primary blast wave, including the temporal and spatial evolution of the static and dynamic components of the blast wave. The goal of this work is to characterize the propagation of shock waves in and around the exit of a shock tube via analysis of the primary shock flow, including shock wave propagation and decay of the shock front, and secondary flow phenomena. To this end, a nine-inch shock tube and a cylindrical sensing apparatus were used to determine incident and total pressures outside of the shock tube, highlighting the presence of additional flow phenomena. Blast overpressure, impulse, shock wave arrival times, positive phase duration, and shock wave planarity were examined using a finite element model of the system. The shock wave remained planar inside of the shock tube and lost its planarity upon exiting. The peak overpressure and pressure impulse decayed rapidly upon exit from the shock tube, reducing by 92-95%. The primary flow phenomenon, or the planar shock front, is observed within the shock tube, while two distinct flow phenomena are a result of the shock wave exiting the confines of the shock tube. A vortex ring is formed as the shock wave exited the shock tube into the still, ambient air, which induces a large increase in the total pressure impulse. Additionally, a rarefaction wave was formed following shock front expansion, which traveled upstream into the shock tube, reducing the total and incident pressure impulses for approximately half of the simulated region. OPEN ACCESS Citation: Kahali S, Townsend M, Mendez Nguyen M, Kim J, Alay E, Skotak M, et al. (2020) The evolution of secondary flow phenomena and their effect on primary shock conditions in shock tubes: Experimentation and numerical model. PLoS ONE 15(1): e0227125. https://doi.org/10.

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“…The shock wave produces a high pressure and a high temperature as well as induced high speed flow. Since the magnitude of these flow features depends on the initial pressure ratio between the driver and driven sections as well as the specific heat ratio of gas medium, shock tubes can be used to study aerodynamic flows in a wide range of temperatures and pressures, which are difficult to obtain in other types of testing facilities [4][5][6][7][8][9][10][11][12][13][14][15][16]. Additionally, shock tubes are applicable to fundamental research in medicine, biology, and industries [17][18][19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Characterization of a novel open-ended shock tube facility based on detonation transmission tubing

Ukai

Kontis

2019

Aerospace Science and Technology

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This paper proposes and demonstrates a novel shock tube driven by commercially available detonation transmission tubing in a safe, repeatable, and controllable manner for laboratory scale experiments. A circular cross-sectional open-ended shock tube (inner-diameter D = 22 mm) driven by detonation transmission tubing was used to investigate the working principle of this novel shock tube using a dynamic pressure transducer and time-resolved shadowgraph photography. Specifically, the shock Mach number, repeatability, and flow structure generated from the tube exit were characterized. The experimental result shows that the flow structure including an initial shock wave, a vortex ring, an embedded shock, and an oblique shock pattern is similar to that of the conventional compressed-gas driven shock tubes. Furthermore, the shock tube has good repeatability of less than 2% with a shock Mach number up to 1.58. The versatile and cost-effective nature of the shock tube driven by detonation transmission tubing opens a new horizon for shock wave-assisted interdisciplinary applications.

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Numerical and experimental study of shock waves emanating from an open-ended rectangular tube

Cited by 8 publications

References 21 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.

The evolution of secondary flow phenomena and their effect on primary shock conditions in shock tubes: Experimentation and numerical model

Characterization of a novel open-ended shock tube facility based on detonation transmission tubing

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