Visualization and Record Methods for the Initiation of Air-Methane Explosive Atmospheres

Șimon-Marinică, Adrian Bogdan

doi:10.5593/sgem2019/1.2/s06.148

Cited by 3 publications

(3 citation statements)

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“…Background oriented schlieren is an optical measurement technique and it used for visualizing density gradients. The principle is the deviation of light rays that pass through a density gradient, which is well known from the Schlieren and Shadowgraph techniques [1]. The deviation is caused by the variation of the refractive index of the transparent media (air).…”

Section: Image Processing Techniquementioning

confidence: 99%

Background-oriented schlieren technique in experimental research regarding the effect of explosion pressure

et al. 2022

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In the following paper, experimental results regarding the effect of explosion pressure are obtained from open field experiments with detonation of explosive charges. In addition, sensors that can be used for security applications for the detection of toxic and explosive compounds, as well as mobile systems for the detection of shock waves due to explosions were used to acquire more detailed results. Sensors are the main components in products and systems used to detect chemicals and volatile organic compounds (VOCs) targeting applications in several fields, such as: industrial production and the automotive industry (detection of polluting gases from cars, medical applications, indoor air quality control. The sensory characteristics of a robot depend very much on its degree of autonomy, the applications for which it was designed and the type of work environment. The sensors can be divided into two categories: internal status sensors (sensors that provide information about the internal status of the mobile robot); external status sensors (sensors that provide information about the environment in which the robot operates). Another classification of these could be: distance sensors, position sensors, environmental sensors - sensors that provide information about various properties and characteristics of the environment (example: temperature, pressure, color, brightness), inertial sensors.

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Section: Image Processing Techniquementioning

confidence: 99%

Background-oriented schlieren technique in experimental research regarding the effect of explosion pressure

et al. 2022

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“…In the last years, computational fluid dynamics has been used to perform risk assessments, mainly in the oil and gas industry. Based on the prediction of consequences of a huge range of potential accident scenarios [2], a level or risk is then estimated.…”

Section: Introductionmentioning

confidence: 99%

Virtual experiments about hydrogen explosions with linear propagation

Șimon-Marinică,

Manea,

Vass

et al. 2024

MATEC Web Conf.

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The dangers associated with hydrogen mainly come from its wide flammability range, it’s extremely fast burning rate (having much more aggressive explosive properties than methane gas) and the considerable amount of energy released when it burns or explode. The development of new applications that use hydrogen as clean energy is constantly increasing, thus, hydrogen can be used on a large scale. This paper presents the use of computational fluid dynamics techniques, regarding the linear propagation of the explosion of air and hydrogen mixture in closed spaces, the main purpose being the determination of the overpressures to which a test stand of this processes is subjected.

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“…In order to observe the phenomenon of ignition [6] of an explosive atmosphere near a source of combustible gas, in the virtual domain a rectangular tube was built in which a methane gas leak was simulated. An ignition source was positioned at one end of the tube and an explosion pressure release hole was configured at the opposite end of the tube.…”

Section: Introductionmentioning

confidence: 99%

Virtual ignition of a methane leak by electric spark

Vlasin¹,

Ghicioi²,

Pasculescu³

et al. 2021

MATEC Web Conf.

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In the virtual environment, respectively in a rectangular tube with a hole at one end, a computational simulation was performed comprising two stages: the first stage aims at simulating a methane gas leak through a hole in the floor of the tube and its diffusion in the air of which the inner volume of the virtual environment is constituted. At the full end of the tube is arranged an electric ignition source that activates in parallel with the gas source, being observed the formation of the explosive mixture in the proximity of the ignition source and the moment of initiation of the explosive atmosphere. The second stage of the simulation is marked by a higher level of velocities characteristic of the explosive process of the airmethane mixture, which involves the use of different settings. The host of the computer simulation is the Fluent application of the ANSYS platform. Post-processing is performed both on the ANSYS platform, through the Fluent and Results applications and through the facilities offered by the Tecplot 360 application.

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Visualization and Record Methods for the Initiation of Air-Methane Explosive Atmospheres

Cited by 3 publications

References 0 publications

Background-oriented schlieren technique in experimental research regarding the effect of explosion pressure

Background-oriented schlieren technique in experimental research regarding the effect of explosion pressure

Virtual experiments about hydrogen explosions with linear propagation

Virtual ignition of a methane leak by electric spark

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