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Propagation and attenuation characteristics of shock waves in a gas–coal dust explosion in a diagonal pipeline network

In order to obtain the propagation and attenuation characteristics of a shock wave gas–coal dust explosion, a diagonal pipeline network was built to carry out a gas–coal dust explosion experiment. Methane with a volume fraction of 9.5% was mixed with 20 g of coal dust with a particle size of 50 μm....

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Autores principales: Jia, Jinzhang, Tian, Xiuyuan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9329475/
https://www.ncbi.nlm.nih.gov/pubmed/35896798
http://dx.doi.org/10.1038/s41598-022-17199-8
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author Jia, Jinzhang
Tian, Xiuyuan
author_facet Jia, Jinzhang
Tian, Xiuyuan
author_sort Jia, Jinzhang
collection PubMed
description In order to obtain the propagation and attenuation characteristics of a shock wave gas–coal dust explosion, a diagonal pipeline network was built to carry out a gas–coal dust explosion experiment. Methane with a volume fraction of 9.5% was mixed with 20 g of coal dust with a particle size of 50 μm. The shock wave attenuation characteristics in the diagonal pipeline network were characterized by the overpressure attenuation coefficient. The results showed that when the shock wave propagated in the diagonal pipeline network, it was offset and superposed multiple times. The overpressure attenuation in diagonal pipes was greater than that in the other pipeline branches. Secondary explosions occurred at all monitoring points. The propagation characteristics of shock waves is less affected by the pipeline network structure when it is close to the outlet of pipeline network. Nonlinear multivariate regression analysis was carried out to analyze the relationship between the overpressure attenuation coefficient and two adjacent monitoring points, the pressure before and after attenuation, and the pipeline angle. The functional relationship was in good agreement with the experiment data.
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spelling pubmed-93294752022-07-29 Propagation and attenuation characteristics of shock waves in a gas–coal dust explosion in a diagonal pipeline network Jia, Jinzhang Tian, Xiuyuan Sci Rep Article In order to obtain the propagation and attenuation characteristics of a shock wave gas–coal dust explosion, a diagonal pipeline network was built to carry out a gas–coal dust explosion experiment. Methane with a volume fraction of 9.5% was mixed with 20 g of coal dust with a particle size of 50 μm. The shock wave attenuation characteristics in the diagonal pipeline network were characterized by the overpressure attenuation coefficient. The results showed that when the shock wave propagated in the diagonal pipeline network, it was offset and superposed multiple times. The overpressure attenuation in diagonal pipes was greater than that in the other pipeline branches. Secondary explosions occurred at all monitoring points. The propagation characteristics of shock waves is less affected by the pipeline network structure when it is close to the outlet of pipeline network. Nonlinear multivariate regression analysis was carried out to analyze the relationship between the overpressure attenuation coefficient and two adjacent monitoring points, the pressure before and after attenuation, and the pipeline angle. The functional relationship was in good agreement with the experiment data. Nature Publishing Group UK 2022-07-27 /pmc/articles/PMC9329475/ /pubmed/35896798 http://dx.doi.org/10.1038/s41598-022-17199-8 Text en © The Author(s) 2022 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Jia, Jinzhang
Tian, Xiuyuan
Propagation and attenuation characteristics of shock waves in a gas–coal dust explosion in a diagonal pipeline network
title Propagation and attenuation characteristics of shock waves in a gas–coal dust explosion in a diagonal pipeline network
title_full Propagation and attenuation characteristics of shock waves in a gas–coal dust explosion in a diagonal pipeline network
title_fullStr Propagation and attenuation characteristics of shock waves in a gas–coal dust explosion in a diagonal pipeline network
title_full_unstemmed Propagation and attenuation characteristics of shock waves in a gas–coal dust explosion in a diagonal pipeline network
title_short Propagation and attenuation characteristics of shock waves in a gas–coal dust explosion in a diagonal pipeline network
title_sort propagation and attenuation characteristics of shock waves in a gas–coal dust explosion in a diagonal pipeline network
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9329475/
https://www.ncbi.nlm.nih.gov/pubmed/35896798
http://dx.doi.org/10.1038/s41598-022-17199-8
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