以甲醇为辅助燃料的超临界水热燃烧反应器数值模拟研究

发布时间：2018-02-24 17:35

本文关键词： 超临界水热燃烧反应器模拟甲醇　出处：《现代化工》2017年06期 　论文类型：期刊论文

【摘要】：对容积式超临界水热燃烧反应器内的燃料与氧化剂的混合与燃烧反应的物理化学过程进行模拟研究,揭示了反应参数、燃料特性及反应器喷嘴尺寸对反应器内温度场、浓度场和燃烧反应速率场的影响规律。研究结果表明,同轴喷射的非预混水热火焰发生化学反应的区域是狭窄的,并且反应器内的最高温度出现在以轴线上出现化学当量的轴向距离定义的火焰长度位置处。初始燃料浓度的增加会使反应器内的火焰温度升高、火焰长度延长;氧化系数的增大,不仅降低了火焰温度,并且可以缩短水热火焰长度;随着入射速度的增加,反应器内开始出现最高温度的位置远离反应器入口,火焰位置延迟。
[Abstract]:The physical and chemical process of the mixing and combustion reaction of fuel and oxidant in a volumetric supercritical hydrothermal combustion reactor was simulated. The reaction parameters, fuel characteristics and the size of the nozzle of the reactor were revealed to the temperature field in the reactor. The effect of concentration field and combustion reaction rate field. The results show that the chemical reaction region of coaxial injection non-premixed hydrothermal flame is narrow. The maximum temperature in the reactor appears at the position of the flame length defined by the axial distance defined by the chemical equivalent on the axis. The increase of the initial fuel concentration will increase the flame temperature and prolong the flame length in the reactor. The increase of oxidation coefficient not only reduces the flame temperature, but also shortens the length of hydrothermal flame. With the increase of incident velocity, the position of the highest temperature in the reactor begins to appear far away from the inlet of the reactor, and the flame position is delayed.
【作者单位】：西北旱区生态水利工程国家重点实验室培育基地(西安理工大学);西安交通大学能源与动力工程学院热流科学与工程教育部重点实验室;
【基金】：国家自然科学基金(21606176) 陕西省教育厅开放基金(15JK1546) 西安理工大学科学研究计划项目(2015CX012)
【分类号】：TQ052.7

【相似文献】