|本期目录/Table of Contents|

[1]张宝亮,丁〓珏,王庆涛,等.约束空间可燃气体燃烧爆轰特性的数值研究[J].中国安全生产科学技术,2012,8(8):23.
 ZHANG Bao liang,DING Jue,WANG Qing tao,et al.Numerical study on the combustion and detonation characteristics  of combustible gas in constraint space[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2012,8(8):23.
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约束空间可燃气体燃烧爆轰特性的数值研究
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
8
期数:
2012年8期
页码:
23
栏目:
学术论著
出版日期:
2012-08-31

文章信息/Info

Title:
Numerical study on the combustion and detonation characteristics  of combustible gas in constraint space
作者:
张宝亮 丁〓珏 王庆涛 刘〓义
(上海大学 上海市应用数学和力学研究所, 上海 200072)
Author(s):
ZHANG BaoliangDING JueWANG QingtaoLIU Yi
(Shanghai University, Shanghai Institute of Applied Mathematics and Mechanics, Shanghai 200072, China)
关键词:
约束空间甲烷燃烧爆轰高精度高分辨率数值格式
Keywords:
constrain space methane combustion detonation highprecision and highresolution scheme
分类号:
X932
DOI:
-
文献标志码:
A
摘要:
在可燃气体的输送、贮存、加工和使用过程中,容易发生可燃气体的燃烧和爆炸事故。文中基于有限体积方法,采用五阶WENO格式进行左右状态量的重构后,利用ROE格式进行空间离散,自行开发程序对甲烷氧气的气相爆轰波传播过程进行了数值研究。计算结果表明:在CH4质量分数为10%的混合气体中,高温高压气团可诱导气相发生爆轰,爆轰波以 21333 m/s的速度传播。在带有障碍物的约束空间内,文中分析了障碍物不同高度、不同间距条件下爆轰波传播时波的绕射、马赫反射等现象,给出障碍物表面压力随时间变化历程和冲量值,揭示波与障碍物的相互作用机理以及由此引发流场的变化规律,为有效地控制可燃气体的燃烧速率、防治爆炸灾害的发生提供理论依据。
Abstract:
For the transportation, storage, processing and use of combustible gases, combustion and explosion accidents happen frequently. In the paper, based on the finite volume method, the numerical study on detonation of methaneoxygen premixed gas by Fortran program was conducted by the fifthorder WENO scheme with interpolating left and right states across a cell interface and the Roe Riemann solver, which was low dissipation, strong resolution for the contact discontinuity and shock capture performance. The computed results showed that the propagation speed of detonation wave is 21333 m/ s ignited by high temperature and high pressure for the mass fraction 10% of CH4 Within the constraint space with obstacles, detonation wave propagation, diffraction, Mach reflection phenomenon for the different obstacles heights and spaces were analyzed numerically. The surface pressure and impulse of obstacle structures changing with time were discussed. Moreover, the interaction mechanism of wave and obstacle,and the consequent variation of flow field were revealed, which provides a theoretical basis for controlling the combustible gas burning rate and prevention of explosion disasters effectively.

参考文献/References:

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备注/Memo

备注/Memo:
国家自然基金资助项目(编号:10802046);上海市重点学科建设(编号:Y0103);上海大学研究生创新基金资助(编号:SHUCX112356)
更新日期/Last Update: 2012-10-16