油气爆炸的氮气非预混抑制实验

发布时间：2018-09-05 14:17

【摘要】：依靠激波管可视化实验台架,完成了油气爆炸的氮气非预混抑制实验,获得了火焰前锋在氮气非预混段内衰减、熄灭过程的高速摄影照片。通过对实验数据和高速摄影照片的分析,讨论了油气爆炸氮气非预混抑制过程的超压特性和火焰行为。结果表明,采用氮气非预混手段能显著降低油气爆炸过程的超压与超压上升速率。油气爆炸的氮气非预混抑爆过程经历了惯性相持期、抑制衰减期和扩散熄灭期3个阶段。氮气分子作为第三体参与化学反应并携带走高能自由基的能量,促使链式反应向中止链大量发展,这是油气爆炸氮气非预混抑制过程的主要机理。抑制衰减期的火焰由衰减抑制区和核心区火焰构成,火焰与氮气的相互作用主要发生在衰减抑制区内。在抑制衰减期内,火焰速度的衰减可用线性公式描述。
[Abstract]:Based on the shock tube visual experimental bench, the non-premixing suppression experiment of gas and oil explosion was carried out, and a high-speed photograph of the flame front attenuation and quenching process in the non-premixed section of nitrogen was obtained. Based on the analysis of experimental data and high speed photographs, the overpressure characteristics and flame behavior of non-premixing suppression process of nitrogen in oil and gas explosion are discussed. The results show that the overpressure and overpressure rise rate of the explosion process can be significantly reduced by using the non-premixing method of nitrogen gas. The process of non-premixed nitrogen explosion suppression of oil and gas explosion has three stages: inertia phase, attenuation stage and diffusion extinction stage. Nitrogen molecules as the third body take part in chemical reaction and carry energy of high energy free radicals, which promote the chain reaction to the termination of a large number of chain development, which is the main mechanism of non-premixed inhibition process of nitrogen gas in oil and gas explosion. The flame during the attenuation period is composed of the attenuation suppression zone and the core flame, and the interaction between the flame and nitrogen mainly occurs in the attenuation suppression region. The attenuation of flame velocity can be described by linear formula during the attenuation period.
【作者单位】：中国人民解放军后勤工程学院军事供油工程系;
【基金】：国家自然科学基金项目(51276195) 重庆市自然科学基金项目(cstc2016jcyjA1617)
【分类号】：O381

【共引文献】