掺氢对二甲醚层流燃烧特性的影响  

Influence of Mixed Hydrogen on Laminar Combustion Characteristics with Dimethyl Ether

作　　者：王鑫 WANG Xin(School of Automobile,Chang'an University,Xi'an 710064,China)

机构地区：[1]长安大学汽车学院,陕西西安710064

出　　处：《汽车实用技术》2022年第9期67-69,共3页Automobile Applied Technology

摘　　要：随着环境污染的日益严重和能源危机的不断加剧,寻找清洁可再生的替代燃料成为研究的热点,二甲醚和氢气作为具有优良性能的替代燃料受到了广泛关注。文章利用大型数值模拟软件CHEMKIN Ⅱ对二甲醚-氢气-空气预混合气的层流燃烧特性进行了数值模拟研究,分析了氢气掺混对二甲醚/空气预混合气绝热火焰温度和层流燃烧速度的影响规律。结果表明,混合气的绝热火焰温度与层流燃烧速度随混合气中氢气掺混比例的增大而升高;当量比的增大,混合气的层流燃烧速度和绝热火焰温度都呈现先增大后减小的趋势;二甲醚掺氢比例增大,绝热火焰温度与层流燃烧速度最高值对应的当量比逐渐增大。With the increasing severity of environmental pollution and the increasing energy crisis,the search for clean and renewable alternative fuels has become a research hotspot,and dimethyl ether and hydrogen have received extensive attention as alternative fuels with excellent performance.The laminar combustion characteristics of dimethyl ether-hydrogen-air premixed gas were numerically simulated by CHEMKIN Ⅱ,and the effects of hydrogen mixing on adiabatic flame temperature and laminar combustion rate of dimethyl ether-hydrogen-air premixed gas were analyzed.The results show that the adiabatic flame temperature and laminar combustion velocity of the mixture increase with the increase of the hydrogen mixing ratio in the mixture.With the increase of the equivalence ratio,the laminar combustion velocity and adiabatic flame temperature of the mixture increase first.The equivalence ratio corresponding to the adiabatic flame temperature and the maximum laminar combustion velocity increases gradually.

关 键 词：二甲醚 氢气 燃烧特性 绝热火焰温度 层流燃烧速度 

分 类 号：U464.114[机械工程—车辆工程]