THERMAL SCIENCE

International Scientific Journal

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Dong Li

,

Shijie Dai

NUMERICAL SIMULATION OF THE EFFECT OF DIAPHRAGM ORIFICE DIAMETER IN A FLAMEPROOF ENCLOSURE WITH AN INTERCONNECTED STRUCTURE DURING PRESSURE PILING

ABSTRACT
Combustible gas explosions are typically triggered at high temperatures by the generation of electric sparks on starting, stopping, or short circuiting of electrical equipment. Flameproof enclosures are widely installed in the petrochemical industry as safety equipment for eliminating ignition sources. Such enclosures are designed with a double-cavity structure, and a hole plate is used to connect the two cavities. However, pressure piling occurs in such double-cavity-connected structures, resulting in flameproof enclosures requiring to bear higher pressure than designed, which is a safety hazard. However, few studies have focused on the effect of the diaphragm orifice diameter of flameproof enclosures. Because the explosion of combustible gas in a flameproof enclosure is a complex process, numerical simulation was performed to study the process. Fluent was used for numerically simulating the ethylene/air premixed gas explosion characteristics of double-cavity-connected structure flameproof enclosures. The effects of an orifice hole diameter from 10 mm to 45 mm on flameproof characteristics, including the maximum explosion pressure, maximum explosion pressure rise rate, and maximum explosion index, were examined. The results are critical for the effective design of a double-cavity flameproof shell and provide theoretical support for fire suppression in a flameproof enclosure.
KEYWORDS
pressure piling, orifice, numerical simulation, fluent
PAPER SUBMITTED: 2022-06-13
PAPER REVISED: 2022-08-15
PAPER ACCEPTED: 2022-08-19
PUBLISHED ONLINE: 2022-09-10
DOI REFERENCE: https://doi.org/10.2298/TSCI220613137L
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2023, VOLUME 27, ISSUE Issue 2, PAGES [1539 - 1551]
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Numerical simulation of the effect of diaphragm orifice diameter in a flameproof enclosure with an interconnected structure during pressure piling

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence