微型动力装置内掺氢甲烷燃烧特性  

Combustion Properties of Hydrogen-Enriched Methane in Micro-Power Plants

作　　者：禹莉莉 王谦[1] 黄蓉 赵岩 柏金[1] YU Lili;WANG Qian;HUANG Rong;ZHAO Yan;BAI Jin(School of Energy&Power Engineering,Jiangsu University,Zhenjiang 212013,China)

机构地区：[1]江苏大学能源与动力工程学院,江苏镇江212013

出　　处：《河南科技大学学报（自然科学版）》2019年第1期30-36,108,共8页Journal of Henan University of Science And Technology:Natural Science

基　　金：国家自然科学基金项目(51476071)

摘　　要：针对微型动力装置存在的燃烧不稳定问题,研究了甲烷掺氢在圆柱型微燃烧室内的燃烧特性。确定了甲烷掺氢燃烧的空间气相化学反应机理,建立了自由活塞动力装置三维立体模型。在试验基础上,基于Fluent软件,数值模拟了甲烷掺混氢气和空气的燃烧过程,研究了掺氢比对微压燃着火界限、着火时刻、着火燃烧过程以及临界压燃初动能等的影响,分析了不同掺氢比条件下混合燃料的燃烧特性。研究结果表明:当物质的量比为0. 5时,掺入氢气可拓宽压燃气体着火界限,提高着火燃烧可靠性,使着火时刻提前。因氢气热值远低于甲烷热值,随掺氢比增大,活塞做功能力减小。当掺氢比为10%～20%时,装置具有稳定的燃烧性能和高做功能力。In view of the problem of combustion instability in the the micro homogeneous charge compression ignition(HCCI)free-piston power plant,the combustion propery of hydroge-enriched methane in a cylindrical micro-combustor was investigated.The chemical reaction mechanism of the space gas phase of hydrogen-enriched methane combustion was confirmed,and the three-dimensional model was established for the free piston power plant.The combustion process between hydrogen-enriched methane and air in the micro combustor was numerically simulated by using Fluent software based on experiments.The effects of hydrogen ratio on the ignition limit,ignition time,ignition process and critical burning energy of the critical combustion were studied.The combustion property of fuel mixtures with different hydrogen ratios were analyzed.The results show that while the mole raito is 0.5,the ignition limit of compression ignition gas can be widened by adding hydrogen.The reliability of ignition and combustion is improved and the ignition time is advanced.Because the heat value of hydrogen is far lower than that of methane,doing work of piston decreases with the increase of hydrogen blending ratio.When the hydrogen blending ratio is within the range of 10%to 20%,HCCI free-piston powerplant has stable combustion performance and high dynamic output performance.

关 键 词：掺氢甲烷 微燃烧室 均质压燃 掺氢比 数值模拟 燃烧特性 

分 类 号：TK463[动力工程及工程热物理—动力机械及工程] TK431