Effect of orifice plates spaces on flame propagation in a square cross-section channel

被引：7

作者：

Li, Quan ^{[1
]}

Lu, Shouxiang ^{[1
]}

Wang, Changjian ^{[2
,3
]}

机构：

[1] Univ Sci & Technol China, State Key Lab Fire Sci, Hefei 230027, Anhui, Peoples R China

[2] Hefei Univ Technol, Sch Civil Engn, Hefei 230009, Anhui, Peoples R China

[3] Anhui Int Joint Res Ctr Hydrogen Safety, Hefei 230009, Anhui, Peoples R China

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2019年 / 44卷 / 40期

基金：

国家重点研发计划; 中国国家自然科学基金;

关键词：

Hydrogen; Orifice plates; Separation distance; Jet flame; Pressure difference; HYDROGEN-AIR MIXTURES; BURNING VELOCITIES; SHOCK INTERACTIONS; PERFORATED PLATE; ACCELERATION; COMBUSTION; GAS; DETONATION; WAVE; TRANSITION;

D O I：

10.1016/j.ijhydene.2018.11.220

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：

This paper investigates the effect of orifice plate separation distance on flame behavior as well as pressure-time histories. Experiments were conducted in a 1 m long, 7 cm by 7 cm square cross-section channel, employing schlieren photography with high-speed camera for visualization to qualitatively identify the propagation mechanisms, and piezoelectric pressure transducers to measure pressure evolution. With two orifice plates in the path of the flame, the flame presents complicated propagating characteristics, i.e., compared to a planar flame, and a corresponding more intricate velocity time-history. It is found that acoustic waves generated in-between orifice plates, after reflection off the second plate, interact with the rear flame front to produce an approximately planar flame. This phenomenon vanishes with decrease in orifice plate separation distance, whereas, with increasing blocking effect the effect is enhanced. In addition, the pressure difference across the second orifice plate correlates with the jet flame length. (C) 2018 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：22537 / 22546

页数：10

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