Ceiling radiation heat flux and downward received radiation heat flux of methane jet fire with hydrogen addition

被引：12

作者：

He, Qing ^{[1
]}

Gu, Mingyan ^{[1
]}

Tang, Fei ^{[2
]}

Sun, Xiepeng ^{[2
]}

Wang, Yang ^{[1
]}

机构：

[1] Anhui Univ Technol, Sch Energy & Environm, Maanshan 243002, Anhui, Peoples R China

[2] Univ Sci & Technol China, State Key Lab Fire Sci, Hefei 230026, Anhui, Peoples R China

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2024年 / 51卷

关键词：

Ceiling jet fire; Radiative heat flux; Flame emissivity; Hydrogen safety; Solid flame model; GRAY-GASES MODEL; WEIGHTED-SUM; NATURAL-GAS; THERMAL-RADIATION; SOOT FORMATION; MIXTURE; TRANSMISSION; TEMPERATURE; TUNNEL; FLAMES;

D O I：

10.1016/j.ijhydene.2023.01.375

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Radiation and flame scale characteristics of ceiling jet are important key elements, which are related to the safety of hydrogen energy transport. In this study, the flame radiation characteristics caused by hydrogen-blended natural gas (mixed gas) pipeline leakage fire were investigated experimentally. The effects of heat release rate, hydrogen addition ratio, nozzle diameter and source-ceiling height are considered. The flame shape of the ceiling jet fire is modeled by a cylinder cone and a cylindrical model. The WSGGM model is applied to calculate the flame emissivity. The flame emissivity is quantized by the equivalent diameter and gas type. The flame emissivity, downward received radiative heat flux and radiative heat flux under ceiling increase with the increase of hydrogen addition ratio. The view factor is calculated by the solid flame model. Moreover, the calculated flame radiative heat flux is in a favorable agreement with experimental results. The research results may provide reference for risk assessment of hydrogen mixing. (c) 2023 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：741 / 753

页数：13

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