高压物理学报2017，Vol.31Issue(4)：409-418,10.DOI:10.11858/gywlxb.2017.04.009
转弯结构对其前方直巷内气体爆炸冲击波的影响
Influence of Bend Structure on Air Shockwave Generated from Gas Explosion in the Straight Tunnel before the Bend
摘要
Abstract
The bend structure is one of the most basic building elements of a coal tunnel.A good understanding of its influence on the gas explosion is essential for estimating the tunnel's blast resistance and thus for optimizing the tunnel's design.In the present work,we studied the influence of the bend structure on shockwaves in the straight tunnel before and at the bend under premixed methane-air explosion using numerical simulations.The shockwave propagation in the straight tunnel before the bend was analyzed.For a one-bend tunnel,the closer to the bend,the more obvious the difference between the impulse at this location and that at the same location in a straight tunnel.For tunnels with different bend angles,the larger the bend angle,the greater the change in the impulse compared with that at the corresponding location in a straight tunnel.Based on the influence of the reflected shockwave on the original shockwave in the straight tunnel before the bend,the relation of the critical scaled distance with the bend angle was established.At the bend,as the bend angle increases,the impulse here increases,and its increase percentage compared with that at the corresponding location in a straight tunnel changes as well,whose relation was also proposed.关键词
气体爆炸/转弯结构/数值模拟/冲击波Key words
gas explosion/bend structure/numerical simulation/shockwave分类
数理科学引用本文复制引用
庞磊,刘海营,夏登友,吕鹏飞..转弯结构对其前方直巷内气体爆炸冲击波的影响[J].高压物理学报,2017,31(4):409-418,10.基金项目
National Natural Science Foundation of China(51404029,51604031) （51404029,51604031）
Open Project of Key Laboratory of Ministry of Public Security of Fire Fighting and Rescue Technology (KF201607) （KF201607）
