Exploring the effects of turbulent field on propagation behaviors in confined hydrogen-air explosion using OpenFOAM

被引：9
作者：
Bo, Yaofen [1 ]
Li, Yanchao [1 ]
Gao, Wei [1 ]
机构：
[1] Dalian Univ Technol, Sch Chem Machinery & Safety Engn, Dalian 116024, Liaoning, Peoples R China
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2024年 / 50卷
关键词：
Initial turbulent kinetic energy; Flame propagation velocity; Flow velocity; Pressure propagation; LARGE-EDDY SIMULATION; BURNING VELOCITIES; MARKSTEIN LENGTHS; PREMIXED METHANE; FLAMES; COMBUSTION; MODEL; MIXTURES; LAMINAR; CLOSURE;
D O I：
10.1016/j.ijhydene.2023.07.303
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：
Explosion always happens in turbulent field, which is hard to measure in reality. This paper explores the influence of turbulent kinetic energy on the propagation behaviors of flame and pressure of stoichiometric hydrogen-air explosion in confined vessel, using large eddy simulation. The momentum equation and progressive variable equation are adapted to consider interaction of turbulence and flame. The results reveal that with initial turbulent kinetic energy increasing, its promoting effects on flame and pressure propagation weaken. For flame at low initial turbulent kinetic energy and low initial pressure, it undergoes three propagating stages: acceleration, steady propagation and deceleration. In addition, flame deceleration is caused by rapid decrease of flow velocity which falls faster with initial turbulent kinetic energy increasing. Furthermore, explosion pressure propagates faster with initial turbulent kinetic energy increasing. Sharp fluctuation of flow velocity appears in the flame zone where big pressure gradient exists. (c) 2023 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：912 / 927
页数：16
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